New Favorite Plants

Every plant sale I find myself enthusiastically telling customers, “This is my favorite plant!” And every plant sale, that plant changes. Lets be honest, every DAY that plant changes! I am always finding new favorite plants that excite and inspire in the landscape. I have been especially impressed with the new shrubs and perennials in my home landscape. With little care and sporadic watering, they have beat the odds and survived in my laissez-faire landscape. Here are a few of my new favorite plants.

Phemeranthus calycinus – Rock Pink or Fameflower

Fameflower is one of very few native succulent plants in Kansas. The thick, needle-like leaves and wiry stems make it a unique addition to any garden. Photo from Wikimedia Commons

I found a few of these growing in the gravel under the benches in the Arboretum greenhouse and couldn’t bear to throw them away. I planted them in my native flower bed at home. A few tiny succulent leaves and a thin, hair-like root has turned into a huge, wonderful plant! Fameflower has never been a big seller, and it never caught my eye until now. These flowers bloom for weeks and weeks, the flowers opening and closing every day. Because they are succulent, they thrive in hot, full sun areas and require little water.

Amorpha fruticosa – false indigo bush

False indigo bush has huge, spikey blooms with showy yellow anthers. Photo from Wikimedia Commons

This shrub has been a favorite for a long time, but I had never planted one for myself. In the same genus as lead plant, it shares those lovely, pollinator-attracting purple spikes in late spring to early summer. The leaves are delicate and pea-like, and they are a favorite food of the silver spotted skipper caterpillar. I planted two of these shrubs in a low spot near the edge of my yard where water often collects after rain. They are thriving! To keep them from getting leggy, I plan to trim them back every spring.

These plants have only been planted for a few months, and already they are attracting wildlife! I saw some strangely folded leaves and upon further investigation found a caterpillar inside. This leaf folding is how the caterpillars create shelter for themselves as they eat.
They are very hard to photograph, but you can see the tiny black head with orange marking and light green body of the silver spotted skipper butterfly.
After blooming, it displays unusual drooping seeds heads.

Lythrum alatum – winged loosestrife

Don’t let the delicate purple flowers fool you; this plant is tough! It has already survived floods and drought in our small rain garden, and it was only planted in May.

No, this is not that terrible invader purple loosestrife taking over US wetlands. This is it’s well behaved native cousin. Wing-loosestrife has been a wonderful addition to our tiny rain garden area, and has come back from the brink of death multiple times when I have forgotten to water. That’s my kind of plant! Hummingbirds, long tongued bees, and skippers are all known to nectar on winged loosestrife.

More favorite plants to come….

This fall I hope to make a few additions to my beds. I need to add some filler and texture to my side yard, so I will plant mountain mint. A long blooming, drought tolerant favorite of pollinators, the white flowers will help blend the colors of the bed into a cohesive look. Pair that with the airy-ness of sand love grass and the charisma of cat claw sensitive briar, and I think the garden will shape up nicely!

Cat claw sensitive briar has spherical pink blooms and leaves that close up when touched. It can be found growing native statewide.

All of these plants and many more soon-to-be favorites are available for purchase at our FloraKansas Native Plant Festival September 10-13. Check our website for information about our member-only day, curbside pick up procedures, and Covid19 updates relevant to the sale.

Shrubs for Wet Areas

Last week while splashing around in a lake in Missouri, I noticed a shoreline of shrubs blooming and covered with pollinators. And wouldn’t you know, someone had just recently asked me to recommend some shrubs for wet areas in their landscape. (Yes, there ARE wet places in Kansas.) The first example was right in front of me. 

Buttonbush (Cephalanthus occidentalis)

That shrub I saw blooming along the lake was buttonbush. This deciduous shrub is commonly found in moist to wet areas in full sun to partial shade.  It can persist even when submerged for a time. The lustrous leaves shine in the sunlight. In early to mid-summer, the unusual, fragrant flower balls of this native shrub are magnets to a host of pollinators. 

I have seen up to two dozen swallowtail butterflies on one plant when in bloom. It has a rounded-upright habit ultimately reaching 8-10 feet tall and wide. ‘Sugar Shack®’ is a shorter form that works well in the landscape. Fruit persists into winter, adding winter interest. 

The Sputnik-like blooms of Buttonbush

 

Elderberry (Sambucus canadensis)

Elderberries are under appreciated as landscape plants.  Even in the wild they often blend into their surroundings.  They are only noticed when they burst into bloom in early summer with dense clusters of white flowers.  Pollinators seek out these flowers and cover the flat-topped bundles. 

Consider planting elderberry shrubs in a drainage area or part of the yard that always floods – they thrive in excess water. Many people use the raw elderberries in jams, wines, and home remedies. ‘Adams’ and ‘York’ are two types of elderberry we recommend for heavy fruit production. You must have at least one of each for best fruiting. 

Elderberry Blooms

Dogwoods (Cornus sp.)

Some of the shrub dogwoods (Silky Cornus ammomum, Cornus racemosa and Cornus drummundii) are good options for wetter areas in the landscape. Each is a little different in height, shape and habit. However, they all offer creamy-white blooms in late spring or early summer. While in bloom, these shrubs are teaming with pollinators. Birds and other wildlife will eat the fruit that is produced. ‘Red Rover’ is a compact selection of silky dogwood with attractive blooms, bluish fruit and nice fall color. 

Others

Black and Red Chokecherry, Aronia melanocarpa and Aronia arbutifolia

Possumhaw, Ilex decidua

Deciduous Holly Fruit in winter

Winterberry, Ilex verticillata cultivars and hybrids

Spicebush, Lindera benzoin

Arrowwood Viburnum, Viburnum dentatum

Blackhaw Viburnum, Viburnum prunifolium

Rusty Blackhaw, Viburnum rufidulum

As it turns out there are very few plants that will grow in soil that is constantly saturated. These shrubs are more tolerant of wet sites than others. Obviously, all plant roots require oxygen in order to function and grow properly.  These shrubs persist in soil that lacks oxygen or is periodically flooded without succumbing to diseases and site related problems. 

Try some of these native shrubs that are more adapted to these adverse conditions. You can find them at our FloraKansas Native Plant Festival in September!

Short and Sweet: Short Plants for the Prairie Garden

Prairie gardens can sometimes be seen as messy. I have heard it many times while discussing garden plans with Arboretum members. They don’t want it to look too wild. This is a very natural tendency; humans like order, we like patterns, we don’t like chaos. But it is evident by the decline of bird, amphibian, and pollinator species that our desire for the tamed, picture-perfect lawn is ecologically unreasonable.

“What is good in terms of ecological function is often disorderly, and what is neat and tidy is often not sustainable.”

Planting in a Post Wild World, 2015

Joan Nassauer of the University of Michigan does some excellent writing, thinking and teaching on the idea that humans will respond better to ecologically friendly landscapes if they look intentional, framed, and well managed. I think the first and easiest way to achieve this for beginner prairie gardeners is to carefully manage plant height. Choosing short plants preserves sight lines, scales down the planting, and helps the viewers of your landscape more feel comfortable, less hemmed in by foliage. Here are some of our favorites!

Petite Garden Performers

Hymenoxys scaposa (prairie sunshine)

Perky Sue (Hymenoxys scaposa) has semi-succulent foliage and cheerful flowers that bloom all season long.

Hymenoxys has become a new favorite landscape plant for me. Perfect near sidewalks and in tight spots. It is a tiny little powerhouse of bloom if you keep it in full sun. Beware of planting it in a wet spot; soggy soil shortens its lifespan.

Scuttelaria resinosa (skullcap)

Scutellaria resinosa (skull cap) a wonderfully petite mint-family plant native to North Central Kansas. Photo By C. Freeman

This plant makes a short, rounded clump of purple-blue flowers. It thrives in dry, poor soil and isn’t as aggressive as other mint family plants. As a bonus, it also has some interesting medicinal benefits.

Amsonia ‘Blue Ice’

Most Amsonia spp. can get quite large, but the ‘Blue Ice’ variety delivers nice foliage and blue spring bloom in a tighter package.

Amsonia ‘Blue Ice’ offers all the great qualities of Amsonia – colorful fall foliage, blue spring blooms – but stays under 18 inches. Wonderful as a filler plant for any gaps in the garden.

Oenothera macrocarpa (Missouri evening primrose)

Oenothera macrocarpa (Missouri evening primrose) – photo by Michael John Haddock

Missouri evening primrose is an underused landscape plant. Less than a foot tall, this spring stunner is great around sidewalks or trailing ever-so-slightly off rock edging. The blooms are large and eye catching early in the season.

Sporobolus heterolepis (prairie dropseed)

Pugster Blue butterfly bush and prairie dropseed mix well in the landscape and both stay under three feet tall. Photo courtesy of Walters Gardens, Inc.

Last but not least, prairie dropseed is a short prairie grass that can be used to blend different colors and species together. Because grass acts as a unifying element it helps to lead the eye from one area to another.

All these plants will be available at our spring FloraKansas Native Plant Festival. Staff members will be there to help you choose the best plants for your space. We can make recommendations for a beautiful, ecologically friendly landscape.

Plant Profile: Possumhaw Holly, Deciduous Holly

If you have been walking through the Arboretum over the past few weeks, you probably noticed the deciduous holly.  Ilex decidua gets so much attention because of its incredibly lustrous fruit of red, orange, and yellow.  As the leaves fall away each year in November and December, the fruit magically appears and remains on the tree for most of the winter. 

‘Sundance’ Deciduous Holly

Fruit

These colorful berries are not a preferred food of birds, but become more appetizing when snow covers the ground.  Often trees are completely stripped of berries in a couple days after a heavy snow, because other food sources are not readily available.  Many birds, including cedar waxwings, flock to these trees to feed on the fruit later in winter.

Deciduous holly requires male and female plants to produce fruit.  Tiny white flowers appear before the leaves in March and April.  We have several male selections planted in close proximity to the female plants to assure the development of the attractive fruit each year.  It is best to keep the fruit producing female plants in the foreground and tuck the male forms out of sight.  We have used the branches with fruit cluster as holiday decorations.

Evergreen wreath
Holly berries as part of an evergreen wreath

Habit and Site Preferences

Deciduous holly, or Possumhaw as it is often called, is a small tree or large shrub that grows 15-20 feet tall. The smooth gray bark of the trunk and branches hold the fruit on the upper half of the plant.  Here in the Arboretum, we have both tree forms and suckering shrubs. Either is attractive and the suckering shrubs making a nice screen. As their name indicates, they are deciduous, dropping the leaves in autumn to fully reveal the berries.      

These deciduous trees grow best in full sun or partial shade.  Trees are more vigorous and produce more berries in full sun.  We have several along our creek channel and some around our parking lot.  They are quite adaptable to wet or drier conditions.

A few selections at the Arboretum:

‘Council Fire’ – An upright, rounded form growing 15′ tall and 10′ wide, this plant is superior for its ample fruit production and retention in clusters along the stems.

‘Council Fire’

Red Escort’ – This is a male selection (pollinator) with glossy leaves and a habit to 20′ tall.

‘Warren’s Red’ – This cultivar grows on the eastern border of the Arboretum parking lot.  It is very hardy and consistently produces fruit.  It is more shrub-like and upright, ultimately reaching 15’ tall. 

‘Warren’s Red’

‘Sundance’ – Nice tree form to 10’ tall and 8’ wide.  It has the longest lasting fruit, which is orange-red.

‘Sundance’

We are planning to have several deciduous holly varieties at our spring FloraKansas Native Plant Festival. Check out our Native Plant Guide for these cultivars along with Ilex verticillata varieties. Each will give you great winter color and habitat for the landscape. We love their hardiness and toughness as well as the beautiful fruit. Why not give them a try?

Shade Plants in Their Natural Habitat

On vacation in early July, some friends and I explored Devil’s Lake State Park, Wisconsin. Rocky and rainy, with lushly forested slopes, it is a very different landscape from my beloved Kansas. While hiking I saw many of my favorite shade plants living in situ, outside the confines of our carefully cultivated gardens. To spot them in their natural habitat is always a thrill!

Devil’s Lake State Park offers well kept hiking trails, rock climbing and water recreation.

Jack-in-the-Pulpit

Jack-in-the-Pulpit was growing along the hiking path ringing the lake. Easy to confuse with poison ivy because of its three leaves, colonies of them grow in part sun locations. In early spring their fluted blooms appear, inconspicuous in yellow and brown. In hot locations they will conserve their energy and go dormant for the summer.

Arisaema triphyllum, Jack-in-the-Pulpit

Ferns

Ferns were growing out of every crag, reaching their delicate fronds upward. Kansas does actually have many of our own native ferns, but they are much harder to find than those in wetter climes. I was really having a hard time keeping up with our hiking group because I was so fascinated by the diversity of ferns around us! I saw christmas ferns, lady ferns and wood ferns all in less than a mile’s walk.

The dots on the underside of the fern frond are spore clusters called ‘sori’.

Coral Berry

I also saw groups of coral berry (Symphoricarpos) growing in the understory, their fruits shining in the dappled light of afternoon. There are lots of cultivars of this plant quite suitable for sunnier locations. They make wonderful bushes for foundation plantings or filler amongst other shrubs.

Luckily you don’t have to go all the way to Wisconsin to see these beauties. All the plants listed in this post will be available at our fall FloraKansas Native Plant Festival fundraiser! Call or email Arboretum staff for more information.

Woodland Phlox

Few plants are as visually striking to me in spring as woodland phlox with its showy lavender color, blooming mid to late April in Kansas. Woodland phlox (Phlox divaricata) is a woodland understory species with a vast native range that covers much of the Eastern U.S. (including the eastern third of Kansas) and Canada.

A Book About Phlox

Jim Locklear, a former director for Dyck Arboretum of the Plains, published in 2011 the book Phlox: A Natural History and Gardener’s Guide. In his description of woodland phlox (he calls it timber phlox), Jim highlights just how perfect this species is found to be: “It speaks volumes that horticulturists in eighteenth-century Europe just left timber phlox alone. While they started refining the other phloxes coming in from the American colonies as soon as they got their hands on them–making selections and breeding new hybrids–they found little reason to fiddle with timber phlox. What could be done to improve upon the earthy, cerulean mood it brought to the springtime garden? Today, timber phlox is an essential element of the shade and woodland garden on both sides of the Atlantic, valued for the bluish hues of its fragrant flowers and its early season of bloom.”

Growing Woodland Phlox

Growing woodland wildflowers in historically prairie-adapted Kansas can be a struggle. Even under the shade of city shade trees, the hot, windy summer conditions here still make it challenging to replicate a moist, cool woodland understory environment where these plants thrive. But among the spring woodland wildflowers I’ve inserted into the shady areas of my home landscape, woodland phlox seems to be one of the easier species to establish. It is even spreading specifically in the locations where I have planted it.

Missouri Botanical Garden (MOBOT) provides the following for the best conditions in which to grow woodland phlox: “Best grown in humusy, medium moisture, well-drained soil in part shade to full shade. Prefers rich, moist, organic soils. Appreciates a light summer mulch which helps retain moisture and keep roots cool.” As with any new planting, be sure to give it regular water as needed for the first year, and since it is a woodland species, supplemental water after that during hot summer droughts.

MOBOT further describes that the genus name is derived from the Greek word phlox meaning flame in reference to the intense flower colors of some varieties. The species epithet divaricata means spreading. Woodland phlox attracts butterflies and hummingbirds.

Conveniently, woodland phlox is showing off its flare along the path to our Dyck Arboretum greenhouse to the delight of the throngs of people visiting during our spring FloraKansas Plant Festival happening this weekend. Consider adding woodland phlox to a shady location in your landscape and enjoy its “earthy, cerulean mood” for many springtimes to come.

A few plants for your sunny spot

Over the past several months, as I have been working on landscape designs for homeowners, I have been noticing a few trends. 

  • First, homeowners are increasingly interested in native plants.  They understand the benefits of utilizing native plants both to the environment and the wildlife they are trying to attract.  The advantages of native plants have been noted in previous blog posts.
  • Secondly, they want something interesting happening/blooming in their landscape throughout the year
  • Thirdly, they want native grasses incorporated into the design. 

To help fill these needs, I have come up with a list of my favorite plants for the landscape that I try to work into most designs. If you need help with your landscape or have questions about using native plants, give us a call or come to the FloraKansas Native Plant Festival. We would be happy to visit with you.

As you know, each landscape is unique and only a handful of these plants will work in specific yards, but they are all hardy and easy to maintain.  These sun loving perennials have beauty and landscape value too.   Here are some of my favorite native or adaptable plants to use for a sunny landscape in South Central Kansas:

Switchgrass (Panicum ‘Northwind’)

This grass is incredible! Do you need a vertical element in the landscape? Then this is the grass for you. The upright clumps have wide steel blue leaves that turn a golden yellow in the fall. The unique flower panicles emerge in September and are held towards the middle of the clump close to the foliage.  Ultimately, it reaches four to five feet tall.  I love this grass because it will not fall over. 

Threadleaf Bluestar (Amsonia hubrichtii)

This is an all-season perennial with fantastic ornamental features that make it stand out from other wildflowers.   In May and June, clusters of small powder blue, star-like flowers top the strong stems.  The stems are encircled with soft, narrow leaves resembling pine needles, making each plant look like a small shrub with feathery texture and incredible fullness. I have found them to be extremely hardy, drought tolerant and very low maintenance.  Other forms worth considering are Amsonia ‘Storm Cloud’ and Amsonia ‘Butterscotch’

Prairie Dropseed (Sporobolus heterolepis)

At one time, this was one of the top selling grasses nationwide.  It is a favorite of mine because it is long-lived and tough.  It is so tough they are planted en masse in street medians.  The fine textured leaves and airy, fragrant panicles are a nice addition to any landscape.  Each clump can reach 12-18 inches wide and up to 24 inches tall.  The entire plant turns shades of orange and yellow in the fall, providing multiple seasons of interest.  It is great in a border, as a groundcover, in an informal prairie setting, or as an accent to other short or mid-range perennials.  I like to mix it with short heath asters, purple poppy mallow, evening primrose or Missouri black-eyed susan. 

Purple Poppy Mallow (Callirhoe involucrata)

Some like it hot, but these like it really hot.  The deep tap root of Purple Poppy Mallow sustains it during times of drought.  These roots are starchy and supposedly taste like a sweet potato.  (I don’t know if I am that hungry, but it may be worth a try.)  The magenta cup-like blooms appear throughout spring and into summer.  I like to interplant them with low grasses or shorter perennials that bloom later in the season, such as blazing stars or goldenrods.  The stems hug the ground and ultimately spread 24-36 inches wide and 6-12 inches tall.

Penstemon ‘Dark Towers’ (Penstemon digitalis)

I love this penstemon in the perennial border.  The pink flowers in spring have just a blush of white and develop interesting seed heads.   It adds outstanding form and texture to any landscape throughout the year.  Penstemon ‘Dark Towers’ is a beautiful selection of smooth penstemon with reddish-purple foliage that is attractive even when blooming is complete.

Aromatic aster (Aster oblongifolius)

This diverse wildflower grows throughout the state, and is more drought-tolerant than other aster species. Its name alludes to its fragrant purple/pink flowers and foliage that exudes a pungent aroma.  This species typically grows about two feet tall, but shorter varieties also exist.  Garden-worthy varieties include ‘Dream of Beauty’ (one foot tall with pink blooms), ‘October Skies’ (2’ x 2’ with light blue flowers)  and ‘Raydon’s Favorite’ (3’ x 2’ with light blue flowers).

Aster ‘Raydon’s Favorite’ in full bloom

Butterfly Milkweed (Asclepias tuberosa)

Butterfly milkweed is a stout one to two foot tall perennial with a deep, coarse, fibrous root system.  Flowers vary in color from deep orange-red in the eastern part of its range to lighter orange and finally yellow farther west and south in Kansas.  Unlike the numerous other milkweeds found in Kansas, butterfly milkweed does not exude a white milky sap when the stem is cut or a leaf is removed.

Do your garden a favor and include some butterfly milkweed.  Its many ornamental and functional assets, plus its rugged character will make it a focal point in the summer garden for years to come.  Plus, you will be rewarded as pollinators such as Monarchs seek out this beautiful native wildflower.

I could choose many more garden worthy perennials, but I only have so much space. You can find these and many other native plants at our spring FloraKansas Native Plant FestivalCLICK HERE for the 2019 Native Plant Guide.  These garden worthy perennials would be at home in any sunny spot in your yard.  Why not give them a try?

Stately Natives

This past Monday, at the swearing in of the new Kansas governor, some native plants from Dyck Arboretum got their time in the limelight. Cuttings from our grounds of evergreens, red twig dogwood, big bluestem and more were featured in the inaugural stage decorations out front of the state house. These natives are perfect for floral arrangements, and are also great performers in the landscape.

Dried grasses, evergreens, mixed with vases of white tulips brought a formal feel to the event while still showcasing Kansas flora. Photo by Jerry Jost

Originally, the volunteers helping to plan the inauguration festivities were looking for potted evergreens, tiny pines and spruces, lined up neat and tidy. When they contacted the Arboretum for those plants, I disappointed them — we don’t have a huge stock of evergreens outside of our sale times. But I asked, “Why not something native? Why not something that reflects the beauty of Kansas in January?” Needless to say, they were right on board.

Kirsten of Blue Morning Glory Studio was the perfect florist to take on this challenge. She regularly designs with native, home-grown and wild sourced elements. She graciously invited me to partner in the process. I have done some small floristry projects in the past, a few weddings or special events, but nothing quite so grand as this! I was immediately energized by the opportunity to work with native material from the Arboretum grounds I know so well.

The Plan: Dyck Arboretum would provide native plant materials, Kirsten will provide vision, expertise, schematics, LOTS of white tulips, and I will deliver the plant material and assist with the build at the Capitol.


My car was completely packed with plant material. So full and fragrant with evergreens, in fact, we had to drive to Topeka with the windows down.

Blue Arizona cypress made up a huge part of the display, really tying into the blue of the inauguration stage and harkening to the blue dominating the Kansas state flag. The cuttings smell fresh and citrusy, making them fun to work with. Arizona cypress (Hesperocyparis arizonica) grows well here in Kansas, making a nice privacy hedge or evergreen shelter for birds. Native to the southwestern United States and northern Mexico, it can handle drought and extreme conditions.

(Left) Arizona Cypress tree in the Northwest corner of the Arboretum. (Right) Cypress foliage

We used eastern red cedar, with its comparably greener hue, to balance the colors and make it look lush and “friendly”, as one of the state house volunteers described it. Our ‘Canaertii’ cedars in The Mother’s Garden are good at resisting the brown/yellow cast that cedars tend to take on over the winter. Deep green and well-berried, with an open branching habit, these cedars are much more attractive yard trees than regular cedars,
and come in handy at Christmas time for making wreaths and swags.

Florists always use some optical magic to make a focal point appear within an arrangement. This time we opted for the deep browns and blacks of rudbeckia triloba seed heads. This native is a mainstay on our grounds and in many landscape designs. Hardy, long lived and brilliantly yellow, it blooms early to mid summer and stays standing tall into winter. Harvest for your own dried arrangements or leave it outside for birds to nibble on.

Rudbeckia missouriensis seed heads from the Gjerstadt garden on Arboretum grounds.

As with any floral design, we needed some accent plants — just a little something to excite the eye. A few sprigs of red twig dogwood, a graceful arc of alder branch (complete with catkins!) were perfect additions. The alder trees on our grounds are not native and are in pretty rough shape from the harsh Kansas living, but they still produce adorable little cones that make excellent design elements or craft material.

Governor Laura Kelly with Kirsten Bosnak and I, plus our handy helpers Bob and Chris.

I am so happy to have been a part of this unique design process with Blue Morning Glory Studio, and to create displays that honor Kansas’ prairie heritage. If you are interested in creating your own floral displays with natives, the first step is to integrate them into your landscape and live with them through the seasons. Attend one of our upcoming Native Plant School classes, our FloraKansas Native Plant Festival, or stroll the sidewalks at Dyck Arboretum to be inspired by the native flora and re-energize your relationship with the land.

Plant Profile: The Versatile Viburnums

In addition to our interest in native trees, shrubs, wildflowers and grasses, one of the goals of the Arboretum is to grow plants which, while not native, are adapted to the rigors of the central Kansas climate. We are especially interested in displaying plants that are not widely grown in the area, but that show excellent hardiness and landscape potential.

The viburnums are a perfect example.  While not as widely known as forsythia and lilac, these shrubs deserve much more use in our landscapes. Not only do they offer year-around show of ornamental attributes, such as abundant floral displays, fragrance, outstanding fruiting characteristics, and fall color, they are also hardy and can serve a number of important uses in the landscape.

The Arboretum collection currently features a number of different viburnums, each displaying unique characteristics and qualities.  Most of the viburnums can be seen along the east border of the Arboretum, just south of the parking lot. A planting on the north bank of the Amphitheater features several additional kinds along with some newer varieties in the Pinetum.

Fragrant snowball viburnum – Viburnum x carlcephalum https://en.wikipedia.org/wiki/Viburnum_%C3%97_carlcephalum

The three most fragrant viburnums in the Arboretum’s collection are the Koreanspice Viburnum (Viburnum carlesii), fragrant viburnum (V. x carlcephalum), and Judd viburnum (V. x juddii). These three are somewhat similar in appearance because the latter two are hybrids involving a cross between the Koreanspice and another viburnum. They are medium size shrubs (6-10 feet tall). However, our collection also includes a dwarf form of the Koreanspice. All produce clusters of fragrant white flowers in April into May followed by inconspicuous black fruits.

Another fragrant type in the Arboretum is Burkwood Viburnum (Viburnum x burkwoodii). This semi-evergreen grows 8-10 feet fall and produces a white snowball-like flower cluster in April. The fragrance in somewhat sharper, almost spicy.

Like the burkwood viburnum, Willowwood viburnum (Viburnum x rhytidophylloides ‘Willowwood’) is semi-evergreen, retaining its furrowed, leathery leaves throughout much of the winter. This 7-10 foot shrub blooms in April and often to a lesser extent again in October. The blue-black fruits are attractive and can be quite abundant. Another form that is really attractive is ‘Alleghany’ which has tough, leathery leaves, attractive white flowers and abundant bunches of reddish-purple fruit.

Alleghany Viburnum. Photo by Emily Weaver

The Wayfaringtree viburnum (Viburnum lantana) grows as a large shrub or small tree (12-15 feet). While not fragrant to any degree, it produces an outstanding floral display in May, followed by red-black fruit in late summer that persists into fall. Fall color is often red, although it is not consistent.

Another large shrub is the Wentworth cultivar of the American cranberrybush (Viburnum trilobum ‘Wentworth’). The Wentworth viburnum was selected for its large, edible fruits, which progress in color from yellow to red to bright red and persist throughout winter. Birds seek out the fruits from fall through winter.  I have often thought that this shrub was at is best on bright winter days with the fruit highlighted against a snowy background. It is also attractive in May with its show of white, flat-topped flower clusters. A dwarf form of the American cranberrybush is found on the north bank of the Amphitheater.

Tucked up under the northeast corner of the Visitor Center is a viburnum that is very attractive. The Doublefile viburnum (Viburnum plicatum forma tomentosa ‘Shasta’) is stunning in bloom as the flowers are held horizontally above the branches.  It has insignificant fruit, but the spring flower show makes up for it.

Doublefile viburnum

The last two species in the Arboretum collection are the Blackhaw (Viburnum prunifolium) and southern or rusty blackhaw (V. rufidulum). These two species are native to Kansas and distinct from each other. Blackhaw viburnum is a large shrub or small tree that has smaller leaves and brighter fall color with oranges, yellows and reds. The dense flower clusters develop into purplish-black fruit that the birds love.

Rusty blackhaw is not widely available in the nursery trade at this time, but extremely adaptable and hardy. The glossy dark green leaves turn a nice burgundy-purple in the fall. Large, white, flat-topped clusters of flowers appear in early spring and later produce bunches of fruit that change from red to purple through the fall.  Again, many types of birds cherish the nutritious fruit.  These two native viburnums are my personal favorite, because they are the most adapted to our Kansas landscapes and have so many wonderful qualities.

Viburnum prunifolium. Photo by Janelle Flory Schrock

Viburnum rufidulum fruit. Photo by Emily Weaver

Any way you look at them, the viburnums are a versatile and highly ornamental group of plants that deserve a greater use in the landscape. We will continue to integrate new species and varieties into our plantings as development of the Arboretum progresses.






Plant Profile: Rattlesnake Master (Eryngium yuccifolium)

There are quite a few native wildflowers that everyone knows – coneflowers, gayfeathers, prairie clovers, evening primrose and so on. But when I tell folks to try some rattlesnake master, Eryngium yuccifolium, I get the blank stare, or the proverbial crickets in the room sound. What does that do? What does that look like?  True, it is one of the lesser known wildflowers, but I contend that it is just as attractive as some of the common wildflowers.

Rattlesnake master, Eryngium yuccifolium, gets its name from the belief that the roots have the ability to heal snake bites. In today’s world, I would stick to the true antidotes. Often the root was dried and used in bitter teas as a supposed cure for maladies such as venereal disease, liver problems, impotence, expelling worms and to induce vomiting. It makes me thankful for modern medicine, but back in the 18th and 19th centuries many herbs from the prairie were used to cure a variety of ailments because they had nothing else.

This unique wildflower’s scientific name comes from the close resemblance the leaves have with a yucca plant. The sword-like leaves have soft tiny barbs along the edges that make it easily recognizable. In the summer, the white thistle-like flowers develop atop the stout upright stems. Even though it looks like a thistle, it is actually a member of the carrot/parsley family. Rattlesnake master ultimately reaches about three to four feet tall with a spread of one to two feet. I like to combine them in groups of three in the middle to back of the flower bed.

In the landscape or in a prairie, it is quite a striking plant. The grey-green foliage and one inch diameter flower heads make it stand out in the garden as an accent plant. The flowers slowly dry and become yellow-brown later in fall and into the winter. The stalks are sturdy and remain well into winter, providing interest in the landscape. We have even used them in dried flower arrangements.

Plant them in full sun or part shade for best growth. They are quite adaptable, but prefer a medium to dry soil. I have planted in spring and fall with easy establishment either time of the year. This is a plant that should be used more in roadside plantings, prairie restorations, prairie landscape settings, and in your wildflower garden.

You may never need a rattlesnake master for a snake bite, but you do need some rattlesnake master in your garden. Its attractive appearance and resilient beauty are outstanding. Plus, pollinators love it too.  You may have just found your next favorite plant.