Trees for the Bees

Posted on June 29, 2016 by Scott Vogt

Are native wildflowers the only plants that bees love? I knew the answer to this question is no, but needed a reminder. The other day as I was giving a tour at the arboretum. We had stopped next to a Littleleaf Linden tree (Tilia cordata). It was extremely fragrant. It was also covered by pollinators including many different types of bees. The hum as they busily worked over the flowers was amazing. It made me think – Are there other trees that pollinators use throughout the year?

Littleleaf Linden

The plight of bees and other pollinators have been in the news lately. Beekeepers struggle with colony collapse. Pollinator populations continue to decline. Habitat loss and dwindling sources of pesticide-free plants make it harder for insects to find the food they need for their very survival. Wildflowers are promoted as the elixir for these endangered pollinators, but in reality a diverse network of food has never been more important. Trees are a vital food source for all sorts of insects. The abundance of flowers at a single location provide bees and other pollinators with valuable sources of nectar. Trees can be part of the solution to these problems. Here is a list of trees that pollinators will flock to when in bloom. Besides helping the pollinators they may give you some shade.

Black Cherry-Prunus serotina

This native tree can be found in the eastern half of the United States. Black Cherry is not a specimen tree, but offers fragrant, nectar-rich flowers followed by tangy fruit that wildlife enjoy. Plant along the outskirts of your property so it has adequate space, ultimately reaching 50-75 feet tall. Other cherry trees and fruit trees offer pollinators nectar early in the year. We certainly benefit from their work.

Black Cherry

Basswood-Tilia americana

This deciduous tree is a bee magnet. The clusters of fragrant yellow flowers in June and July attracts pollinators from all over the neighborhood. The foliage is heart shaped, which provides dense shade. It has an upright habit that develops into a broad spreading tree over time to 75 feet. The smaller (to 40-50 feet) non-native cousin Littleleaf Linden is just as alluring to pollinators. The variety ‘Redmond’ is one of the most common available at your local garden center.

Willows-Salix sp.

This is often overlooked as a group of trees, but it is extremely important to a wide variety of pollinators. Consider planting a pussy willow or weeping willow in your garden, especially if you have a wet spot. I grew up fishing around and under Black Willow trees along the East Emma Creek. I can still remember being scolded and even dive bombed by a Red-winged Blackbird that was protecting its nest in one of these Black Willow trees. They are not very ornamental, but valuable to a host of wildlife along with many different pollinators.

Pussy Willow

Catalpa-Catalpa speciosa

This is a tree that deserves wider use because it is very adaptable and tough. The showy, white flowers in June are sought by bees. These flower clusters develop dangling cigar-like seed pods. The heart-shaped leaves are attractive along with the irregular branching of the tree. It as many unique features that may be worth a try in your garden.

Catalpa

Black Locust-Robinia pseudoacacia

This native tree makes fantastic honey. The creamy white, fragrant flowers dangle from the branches in long 4-8 inch racemes. Bees flock to the flowers that are rich in nectar and pollen. The black locust tree is quite adaptable but needs full sun for best growth. Most trees reach 30-60 feet tall at maturity. Look for varieites called ‘Frisia’ or ‘Purple Robe’ to establish in your garden.

Black Locust

Diversity is the key to pollinator success. The pollinators needs a variety of plants that bloom a different times all through the year. Blooming trees literally take pollination to a new level. Your bee-friendly habitat needs some blooming trees.

Trees for the Bees Photo Credits

Plant profile: Golden Alexander (Zizia aurea)

Posted on June 15, 2016 by Scott Vogt

Several years ago as I was preparing for our fall plant sale, I noted that I had a flat of 32 golden alexanders (Zizia aurea) ready for the sale. I went back three days later and could not find the plants anywhere. I thought somebody had moved them, but later discovered the flat of plants had been eaten to the soil line by Swallowtail butterfly caterpillars. They were on several other plants in the gardens as well as a few random plants within the nursery. I was amazed at how voracious those caterpillars were. They literally ate the plants to the ground.

The beautiful bloom of Golden Alexander

Golden alexander (Zizia aurea) is the Kansas Native Plant Society 2016 Wildflower of the Year. They are most often found in prairie savannas, woodland edges, wooded bottomlands, stream banks, moist meadows, and floodplains. They are quite adaptable once established surviving even the driest summers.

The deep green leaves of golden alexanders are distinctly divided and tough. This wildflower grows between 12″ to 36″ tall with yellow flowers in flat topped umbels forming in May and June. The seeds that develop resemble dill seeds. Be careful! If it is happy, it will self-seed and colonize an area.

Zizia aurea is an important plant whether in bloom or not blooming. It is a member of the parsley/carrot family, which are host plants for Swallowtail butterflies. When in bloom, many other pollinators are attracted to the bright yellow flowers. It is a pollinator magnet.

Blue False Indigo with Golden Alexander in the foreground and background

This native wildflower is extremely easy to grow in either full sun or partial shade. I tend to plant it in areas that receive morning sun and then are shaded during the hottest part of the day. It can thrive in clay soils and the shiny foliage and vivid yellow flowers make this a welcome addition to your wildflower garden. Plant a few as an offering to the Swallowtail butterflies. In my opinion, this is a plant that should be in every garden.

Plant Profile: My Run-in With A Texas Buckeye

Posted on May 4, 2016 by Scott Vogt

There are some experiences we will always remember and others we need to be reminded of from time to time. One of those experiences happened for me with the Texas Buckeye near the Arboretum parking lot. Each spring when it blooms, I am reminded of the time I about killed that tree.

Texas Buckeye Blooms

It was one of the first years I was working as the horticulturist/grounds manager. I was mowing close to that tree, which had been planted the year before. It was supported with wires from the trunk to stakes in the ground. I turned the mower and WACK! The top of the tree hit me on the head.

Have you ever had the sudden realization that something isn’t right? Have you ever had that feeling in the pit of your stomach to not turn around? I turned around to see that the back of my mower had caught one of the wires and pulled the tree over, breaking the trunk about two feet off the ground. I wanted to crawl in a hole.

The Texas Buckeye (Aescules glabra var. arguta) tree, which was now laying horizontal, had been sought diligently for this specific spot. In one second, I had killed it.

Have you ever had thoughts of hiding something you did wrong? That thought flashed into my mind. Will anyone notice? I was in a jam. So, I decided to take my lumps.

I walked into Larry Vickerman’s office, who was the director at that time, and told him the bad news. To his credit he didn’t yell at me, but I certainly would have deserved it. He took a look at it and we decided to try to set it upright again. We gently unhooked it from the mower and made it vertical and then wrapped the place where it bent over with tree wrap. We crossed our fingers that it would survive. It did survive the rest of that year and bloomed the next year. It has continued to bloom each year since and each spring I am reminded of the time I was hit upside the head. Maybe there is a lesson to be learned in this story. Maybe I need to be hit upside the head from time to time.

Anyway, if you look close, the scar is still visible, but it has fully healed. This beautiful small tree has palmately compound leaves that will turn yellow-orange in the fall. The real show in is May when the creamy, yellow flower panicles emerge. The blooms are spectacular and very eye catching, because they appear at the ends of the branches. It is an understory tree, which becomes most visible when in bloom. The leathery seed pods develop later in the year and contain tannish-brown, shiny seeds that look like “buck (deer) eyes” . The seeds are known to be poisonous along with all parts of the plant as well. If the tree becomes really drought stressed, it will prematurely drop its leaves. Ultimately reaching 20-25 feet tall and 15-20 wide, it is a wonderful small tree for the landscape.

This is a great native small tree that deserves more use. Each year, I get a renewed sense of relief, because I know what I did to it, yet is still thrives. If this Texas Buckeye can survive being toppled by a mower, it can survive anything you throw at it.

Native Plant Combinations for the Landscape

Posted on April 20, 2016 by Scott Vogt

Many people who visit our FloraKansas Plant Sale are very interested in converting their gardens to using native plants, but they often are unsure of which plants to put together and in what configurations. Here are a few tried and true combinations that I have enjoyed, both in our plantings at the Arboretum, and at my home. I hope these suggestions start to get your creativity flowing.

(In addition, you may want to check out these other resources: Landscaping Recipe Card, Establishing Native Plants, and Other Native Plant Landscape Designs)

Perennial Gardens Using Natives

Use these native plant combinations in either a foundation or island planting. Each garden can be modified to fit your space. These plant combinations have been carefully selected to provide year around interest with minimal maintenance required, and will attract a diverse group of pollinators.

PERENNIAL BORDER-SUN

Five Panicum ‘Northwind’ and five Baptisia ‘Pink Truffles’ in the back row, alternating
Seven Aster ‘Raydon’s Favorite’, middle back row
Seven Penstemon ‘Dark Towers’, middle front row
Seven Solidago ‘Little Lemon’ and seven Bouteloua gracilis ‘Blonde Ambition’ in the front row, alternating

PERENNIAL BORDER-SUN Less than 36 inches tall

Seven Panicum virgatum Cheyenne Sky’ in the back row
Seven Agastache ‘Summer Love’ in the middle back
Five Echinacea paradoxa and five Schizachryium ‘Standing Ovation’, alternating in the middle front
Five Aster ‘Snow Flurry’, five Callirhoe involucrata and five Bouteloua ‘Blonde Ambition alternating in the front row

Purple Poppy Mallow and Blue Grama

ISLAND PLANTING-SUN

Three Cephalanthus ‘Sugar Shack’ (Center)
Five Schizachyrium ‘Blue Paradise’, five Liatris spicata ‘Alba’, three Butterfly weed, alternating in the middle row back
Five Aster ‘October Skies’’ and three butterfly weed middle row front
Seven Oenothera macrocarpa and seven Prairie Dropseed, alternating front row

Butterfly weed and Shasta Daisy

SHADE

Three Oakleaf Hydrangea, back row
Five Solidago caesia, middle row back
Five Aquilegia canadensis and five Polygonatum biflorum, middle row front, alternating
Nine Carex eburnea, front row

Plants for containers

These combinations will provide interesting colors, textures and blooms throughout the growing season. Each list of plants are for larger pots that are at least 12-18 inches in diameter. Place center plants in pot first, then arrange other perennials evenly around the rim of the container. I really enjoyed my potted native plants last year. It was amazing to watch the pollinators come up to my back deck. It was like having a front row seat.

SUN

Three Coreopsis ‘Cosmic Eye’
Two Heuchera
One Gaura ‘Rosyjane’
One Schizachyrium ‘Twilight Zone’ (Center)

Three Agastache ‘Raspberry Summer’
One Panicum ‘Northwind’ (Center)
Three Monarda ‘Grape Gumball’

One Physocaprus ‘Tiny Wine’
Three Agastache ‘Kudos Yellow’
Three Bouteloua ‘Blonde Ambition’

SHADE

Three Heuchera ‘Autumn Leaves’
Three Carex appalachica
One Solidago odora (Center)

Three Native Ferns
Two Wild Ginger
One Aruncus ‘Misty Lace’ (Center)

PART SUN

One Rhus ‘Tiger Eyes’ (Center)
Two Heuchera ‘Obsidian’
Two Aster divaricatus ‘Eastern Star’

These are do it yourself native plant combinations that will work well, if matched to your landscape. They will provide easy care, attract a wide variety of wildlife, while providing beauty for your garden. Just choose a set of plants that fit your area or pot.

As the saying goes, “…if you build it they will come” or in this case “…if you plant it they will come.” Have fun in your garden this year.

Katie’s Plant Picks: Mint Family

Posted on April 13, 2016 by Katie Schmidt

Working in the Arboretum greenhouse is a terrible temptation. I love my perennial garden at home and I never stop adding new specimens, so our selection of natives and adaptables this year is a treasure trove for me. I must truly exercise some self control to prevent my entire paycheck from turning into wildflowers. Until I win the lottery or inherit a rich uncle’s fortune, I will have to just pick a few favorites!

If you, like me, have a fond eye for every flower, then it may be helpful to guide your shopping this year by selecting a plant family to collect. Researching a scientific plant family and finding those species native to your area can help lend a theme to your garden, add cohesiveness, and curtail your wild garden spirit.

This year I am going to plant from the mint family, Lamiaceae, or formerly, Labiatae. Lucky for me, our upcoming sale has lots of gorgeous options!

A red variety of bee balm shown with solidago (Left) and a light purple Monarda fistulosa (Right). Bee balm is part of the mint family.

Family Traits

Lamiaceae (lame-ee-ay-see-ee or lame-ee-ay-see-ii) is a large plant family with of over 3500 species. In science lingo, families are groupings of plant genera – a fancy way to say that these plants share common traits. A tell-tale sign of a mint family member is a strong aroma from the leaves, be it traditionally minty or not. These plants are some of the most valuable aromatic, culinary and medicinal crops in the world – rosemary, oregano, thyme, basil, salvia, hyssop, bee balm, and lavender are all a part of this big family.

Mint family plants commonly have square stems and flowers with bilateral symmetry (top and bottom do not match but sides mirror each other). The pictures in this post will hopefully help you to recognize some of the common traits shared among the mint family, and soon you will be identifying mint family species on your own!

Following are my top mint family picks from our plant sale, along with a list of varieties available.

Agastache ‘Raspberry Summer’ (left) Salvia azurea (right)

My Plant Picks

One of my top picks from the mint family is agastache, commonly known as hyssop or hummingbird mint. It thrives in sun and heat and its leaves emanate a wonderfully minty scent. Its tubular flowers attract hummingbirds to the garden. We are offering it in yellow, orange, blue, violet, and pink – perfect for whatever color combination you can dream up! Blooming from early summer to late fall, agastache is a showstopper year after year in the landscape.

A. foeniculum – Agastache ‘Kudos Yellow’ ‘Kudos Coral’ ‘Raspberry Summer’ ‘Summer Sunset’
‘Summer Love’ ‘Blue Boa’ ‘Violet Visions’

Salvia is another sun loving flower that I will be adding to my garden this year. Pictured above is a native variety, growing as tall as 5 feet in the right conditions. Salvias come in all shapes and sizes; mound forming, tall and showy, wispy, etc., and many different colors. Their long flowering spikes add nice movement in the breezy garden and are beloved by butterflies. The sale will have saturated deep blues and magenta available, as well as lighter tones, pink and lavender.

S. azurea ‘Grandiflora’ – S. pitcherii ‘Nekan’ – S. greggii ‘ Furman’s Red’ ‘Ultra Violet’ – S. nemerosa Violet Riot’ ‘Pink Dawn’ ‘Crystal Blue’ ‘Caradonna’ – S. macrophylla ‘Hot Lips’ ‘Windwalker Royal Red’

If you love the smell of Earl Grey tea then monarda is for you! Commonly called bee balm or wild bergamot (because of its similar fragrance to Citrus bergamia, source of earl grey tea), the leaves of this plant release their pleasant aroma every time you water or brush past. This year we are offering many different varieties of monarda, some native and others hybridized, in various shades of red and purple.

M. fistulosa – M. didyma ‘Pardon My Pink’ ‘Pardon My Purple’ ‘Pardon My Cerise’ ‘Leading Lady Plum’ ‘Grape Gumball’ ‘Lilac Lolipop ‘ ‘Cotton Candy’ ‘Cherry Pops’ ‘Rockin Raspberry’

It’s hard to only pick a few when we have so many ‘minty’ options! More than just the three discussed here, we also have catmint (Nepeta sp.), Russian sage (Perovskia atriplicifolia) and lavender (Lavendula ‘Phenomenol’), and many more. If you come to the sale, you know where to find me – hovering near the mint family plants, sniffing away!

Some information fact checked at http://delta-intkey.com/angio/www/labiatae.htm
Photos from Dyck Arboretum archives and Walter’s Gardens media resources.

Wonderful White Wildflowers

Posted on March 2, 2016 by Katie Schmidt

Our greenhouse is finally filling up, and what a sight! Little green sprouts are popping up in their pots, eager for more warm weather. By the time our plant sale rolls around the greenhouse will be a gallery of purple, pink and orange blooms! Unfortunately, all that gorgeous color will surely steal the spotlight away from some of my favorite white flowering species. Too many native and adaptable white wildflowers don’t get the attention they deserve in the modern garden. Opposite of the recent Oscar’s controversy, we aren’t giving these wonderful whites enough attention! White flowers add brightness to shady or green-dominated areas and won’t clash with your existing color palette.

Here are a few of my top picks from our upcoming plant sale that will add an under-celebrated species and a pop of brightness to your landscape:

Dictamnus albus – Gas Plant

Dictamnus albus, Gas Plant – https://commons.wikimedia.org/wiki/File%3ADictamnus_albus_280506.jpg

Dictamnus albus could be the conversation piece of your garden this year! Contrary to what its name suggests, it has a pleasant, citrus aroma when in bloom and the flowers are good for cutting. The “gas” in its common name refers to its flammable nature – the whole plant is covered with a thin layer of volatile oils that, in the right conditions, can be ignited for a brief flash of blue flame. A fun patio party trick, to be sure! These volatile oils can cause skin irritation (known as phytophotodermatitis, if you are looking to impress your friends or physician) akin to a chemical burn, a result of the oils reaction to sunlight on the skin surface. In my opinion, the beauty and intrigue are worth the small risk. Known for its longevity, it is perfect for a full sun or part shade area that is not likely to be disturbed, for the health of your epidermis and for the happiness of the plant.

Parthenium integrifolium – Wild Quinine

Parthenium intergrifolium, wild quinine – https://commons.wikimedia.org/wiki/File%3AParthenium-integrifolium-wild-quinine-0a.jpg

Tragically underused in today’s gardens, wild quinine blooms reliably all summer long and produces attractive seedheads for dried arrangements during fall and winter. Dreamy pearl-like flower clusters form atop serrated foliage. It thrives in full sun and isn’t preyed upon by bunnies and deer – the leaves are sandpapery and unpalatable. An attractant for equally undervalued pollinators, many species of beetles, wasps and flies flock to wild quinine to feed on its pollen and nectar. Tall and clump forming, it creates a dynamic backdrop for other, shorter flowers.

Ceoanthus americanus – New Jersey Tea

Ceanothus americanus, New Jersey Tea – https://commons.wikimedia.org/wiki/File%3ACeanothus_americanus.jpg (Public Domain)

A showy native shrub, New Jersey Tea grows to 3 – 4 feet tall and produces panicle shaped flower clusters in late spring to midsummer. The eastern namesake comes from its use as a surprisingly yummy tea substitute during the Revolutionary War and also utilized by Native Americans for various internal ailments*. The dense and vigorous growth habit make it difficult to transplant once established, so pick a permanent home for it in your garden. Ceaoanthus is quite tolerant of drought and poor soil, growing well in rocky, sloping areas. The Spring Azure and Summer Azure butterflies (Celastrina sp.) use New Jersey tea as their larval host plant and continue to feed on the nectar as adults. A great alternative to high maintenance, non-native shrubs.

I’ll be saving my pennies to snag a few of these beauties for my own garden, and hopefully some of you will as well. A complement to any landscape or flower arrangement and a haven for special pollinators, why shouldn’t we adore them?

Attributions:

Gas Plant: By Bernd Haynold (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html), CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/) or CC BY 2.5 (http://creativecommons.org/licenses/by/2.5)], via Wikimedia Commons

Wild Quinine: By Adamantios (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0) or GFDL (http://www.gnu.org/copyleft/fdl.html)], via Wikimedia Commons

*info from Medicinal Wild Plants of the Prairie, Kelly Kindscher 1992

Spring Flowering Native Plants

Posted on February 17, 2016 by Brad Guhr

I love changes in the seasons. The dawn of spring, however – giving forth increased warmth, a variety of distinctive earthy to sweet smells, green and colorful sights, and sounds from many species of waking wildlife — is a favored time of the year.

Spring-blooming prairie and woodland plants are among the first to take advantage of warmer soils and days with increasingly just enough sunshine. Their green shoots emerge early and produce colorful flowers that feed early pollinators and brighten sunny to partially-shaded landscapes.

The following are some of my favorite spring prairie and open woodland plants that also serve as landscaping gems because they flower in March, April, and May:

a.	Baptisia australis var. major	blue false indigo	full sun
b.	Callirhoe involucrata	purple poppy mallow	full sun
c.	Clematis fremontii	Fremont’s clematis	full sun
d.	Geum triflorum	prairie smoke	full sun
e.	Koeleria cristata	Junegrass	full sun
f.	Oenothera macrocarpa	Missouri evening primrose	full sun
g.	Penstemon cobaea	penstemon cobaea	full sun
h.	Penstemon digitalis	foxglove beardtongue	full sun
i.	Pullsatilla patens	pasque flower	full sun
j.	Tradescantia tharpii	spiderwort	full sun
k.	Verbena canadensis	rose verbena	full sun
l.	Amsonia tabernaemontana	blue star	part shade
m.	Aquilegia canadensis	columbine	part shade
n.	Heuchera richardsonii	coral bells	part shade
o.	Senecio plattensis	golden ragwort	part shade
p.	Zizia aurea	golden alexander	part shade

There are so many benefits to be found in landscaping with native plants. They will greatly enhance the biological diversity and ecology of your yard by providing food for insect larvae and flower nectar for pollinators. Small mammals and birds feast on the abundance of available seeds. Predatory insects, birds, mammals, amphibians, and reptiles will find food in the abundance of available insects. Even the smallest of native gardens can be a mini wildlife sanctuary.

Native plant gardens connect us to our natural and cultural history. Even if you don’t use your home landscape today as your grocery store, home improvement store, and pharmacy, Plains Indians and later European settlers certainly did just a few generations ago. The plant and animals of the prairie (especially the bison) were critically important to human survival.

The deep roots and unique traits of native plants make them very adaptable to our Kansas climate and provide sensible and sustainable landscaping. Once established, these plants require little to no supplemental water and require no fertilizers, herbicides or pesticides if properly matched to the site.

Even if you are only interested in colorful garden eye candy, this list of spring flowering native plants will provide a beautiful array of flowers to brighten your spring landscape. You can find these plants at our FloraKansas Plant Sale.

Photo Credits

Asters: Autumn’s Crescendo

Posted on September 23, 2015 by Scott Vogt

Mention fall blooms to most gardeners and they think of chrysanthemums. Blooming in September and October, “mums” are the major source of color in most late-season gardens.

Another group of fall-bloomers that are just as attractive, but not as well-known, are the asters. Asters are related to chrysanthemums (both are in the Sunflower Family) and have similar daisy-like flowers. Like chrysanthemums, asters also come in a wide variety of sizes and colors and are perennial, meaning they come up year-after-year. There are several native asters in the collections of the Dyck Arboretum and these are discussed below.

The New England aster (Aster novae-angliae) occurs in eastern Kansas. One of the taller species, this plant may reach three to four feet in height. The flowers are generally a shade of purple in color, although pink and white-flowered forms have been found. ‘Purple Dome’, ‘Hella Lacy’, ‘Alma Potschke’ and ‘Vibrant Dome’ are good varieties for the garden.

New England Aster with Monarch

The sky blue aster (previously Aster azureus, now Aster oolentaniensis) grow two to three feet tall and has a bright blue flower. Also occurring in eastern Kansas, this species in particularly useful as a garden plant because it can tolerate dry shade. ‘Bluebird’ is a nice selection.

The aromatic aster (Aster oblongifolius) grows further west than the previous species, and is a more drought-tolerant plant. Its name alludes to its fragrant purple flowers and pungent foliage when bruised. This species grows about two foot tall. We have ‘Dream of Beauty’ (short with pink blooms), ‘October Skies’ (2’ x 2’ with light blue flowers) and ‘Raydon’s Favorite’ (3’ x 2’ with light blue flowers).

Aster oblongifolius ‘October Skies’

The heath aster (Aster ericoides) has the smallest flowers of any in the group, but it produces them in large enough numbers to make an impressive show. In the late summer, it is covered with tiny white daisies. Typically, it grows to two feet tall. This adaptable plant occurs throughout much of Kansas. ‘Snow Flurry’ is a groundcover form only reaching 6-8 inches tall.

Fendler’s aster (Aster fendleri) is the smallest of all the Kansas asters, only reaching about eight inches in height. Occurring in central and western Kansas on dry, rocky prairie, it is probably the most drought-tolerant of our native asters. In September these low plants are literally covered with lavender daisies. The variety ‘My Antonia’ would make a nice addition to a xeric garden.

A few varieties for shade would be White Woodland Aster (Aster divaricatus ‘Eastern Star’) which makes a great groundcover with white blooms and mahogany stems. It only reaches 12 inches tall. The other woodland aster is Blue Wood Aster (Aster cordifolius) which is taller (3’ X 3’) with loads of tiny light blue flowers.

White Woodland Aster

In addition to being appreciated by humans, many asters also attract many different pollinators including Monarchs. Planting asters is a good way to bring these beautiful creatures into the home garden.

Of the asters described above, only New England aster is widely available for purchase. We carry many of these asters at our FloraKansas plant sales. The others can be obtained from mail-order nurseries that specialize in wildflowers.

These native wildflowers are good examples of plants that are not only beautiful and useful, but also hardy and adapted to our climate and growing conditions. In my opinion, you should give them a try.

Silphiums: Four Pillars in the Tallgrass Prairie

Posted on August 19, 2015 by Scott Vogt

2015 seems to be the year of the genus Silphium in the arboretum. In recent years, I can’t remember them looking so bright or growing so tall. With the spring and summer rains these sun-loving, yellow-flowered plants have reached a new level. In fact, they are among the tallest plants of the prairie in late summer and autumn. We grow and sell four species: Prairie Dock, Silphium terebinthinaceum; Cup Plant, Silphium perfoliatum, Compass Plant, Silphium laciniatum; and Rosinweed, Silphium integrifolium. Each of these are distinct and easily identified by their unique leaves.

Prairie Dock (Silphium terebinthinaceum)

I call this the Hosta of the prairie. It almost has a tropical-look to it, with large rough leaves up to one foot wide and two foot long. It will make a statement in the landscape, but give it plenty of room and keep it away from walkways, because the long stems tend to arch over the path. Individual clumps can become large over time reaching six feet in diameter. The yellow flowers develop in mid-August atop tall leafless stalks. This member of the tallgrass prairie is one of my favorite wildflowers. In my opinion, Prairie Dock is a must in your wildflower garden. Update (2023), I love this plant but we have found that it self seeds everywhere. If you include it in your garden be prepared to deadhead after flowering to avoid a monoculture of prairie dock. Use with caution.

Prairie Dock

Prairie Dock with Missouri Black-eyed Susan

Cup Plant (Silphium perfoliatum)

A natural bird bath in the landscape. Each pair of leaves clasps around the stem forming a small basin. When it rains, these crude cups fill with water that is then available to wildlife. They stand tall in the landscape and therefore work well as a screen. I have also used them as a dark green background for other shorter perennials like black-eyed Susan, and gayfeather. The yellow blossoms can be seen starting in July and are visited by a host of butterflies. Later, birds cherish the seeds. Cup Plant thrives in heavier clay soils or even wet conditions. It will be happy in any setting if given ample sunlight.

Cup Plant with water

Cup Plant Flower

Compass Plant (Silphium laciniatum)

Do you need directions? This is the plant that can help. The interesting basal leaves look like flat hands. Those lower leaves usually orient themselves north-south to minimize exposure to the intense summer sun, hence the descriptive common name. These extremely tall (up to ten feet) wildflowers are found in prairies and glades throughout the eastern third of Kansas. Each stem is covered with tiny white hairs that give it a rough, bristly feel. The bright yellow flowers emerge along the upper parts of the plant in summer. Split or broken stems exude a clear sticky resin much like pine sap. Native Americans used this resin as a mouth-cleansing chewing gum. I think I will stick with Trident®.

Dyck Arboretum Blog: Silphiums, Compass Plant

Compass Plant Leaf

Rosinweed (Silphium integrifolium)

Rosinweed is shorter, but just as tough as the other Silphiums. Again, the name describes the resin exuded if the stem is bruised or broken. The golden yellow flowers that mature at the top of the stems are beautiful in the summer. It is a pollinator magnet, attracting bees, butterflies and even hummingbirds to the flowers. It becomes a natural bird feeder in the fall and winter as the seeds are devoured by birds. It is quite drought tolerant once established and is at home in a wide variety of soils.

Rosinweed

While each of these wildflowers are unique in appearance, especially as you look at the leaves, they all have that “clear, sticky juice” that exudes if the stem is damaged. I love them in the landscape, but they need room because they grow so tall. They are great in prairie settings or areas on the periphery of your yard. You can’t go wrong – just give them plenty of sunlight so the sunflower-like blooms can brighten your summer landscape.

Each of these plants can be purchased at our FloraKansas Fall Plant Sale, September 11 to 13.

Three Native Sedges Made for the Shade

Posted on July 29, 2015 by Scott Vogt

One of the toughest areas to grow plants is in dry shade. There is a smaller plant palette that grows in these harsh conditions compared to more sunny locations in your yard. Root competition really limits what will do well under the trees. While most home landscapes have at least one area that is either partially or fully shaded throughout the day, it can be difficult finding native alternatives to the standard plants like hostas chosen for these shady niches.

There are a few native plants that will thrive in this tough environment. Here are three native sedges that are worth considering.

Appalachian Sedge – Carex appalachica

An exciting native sedge that works well in mass plantings (one to two foot spacing), along shady slopes and “no mow” lawns. It is gaining in popularity because it is so easy to grow. We have carried it the last few years at our plant sales and customers who have tried it come back wanting more. It forms a true clump with narrow leaves only getting 6-8 inches tall. Each clump spirals upward as each blade intermingles with the others. It is a shade to part sun-loving sedge that is quite appealing.

Carex appalachica Photo Courtesy Hoffman Nursery, Inc.

Bristle-leaf Sedge – Carex eburnea

This fine-leaved sedge makes an excellent ground cover or lawn alternative for that shady spot. The fountain-like clumps of dark green foliage are soft to the touch. It stays short only reaching 6-12 inches. Over time, the individual tufts will grow together forming a thick sod. In the fall, the clusters turn a nice tan. It appreciates sharp drainage, but not too much sun. Plant them in mass for dramatic effect.

Carex eburnea Photo Courtesy Hoffman Nursery, Inc.

Pennsylvania Sedge – Carex pensylvanica

This sedge is tough. It spreads by runners forming a dense mat after several years. This quality is why many use it as a great lawn substitute for the shade. The fine textured leaves are soft under your feet, too. It is most effective when planted in mass. You will appreciate its drought tolerance and resilient nature once it is fully established.

Carex pensylvanica Photo Courtesy Hoffman Nursery, Inc.

See, there are some plants that flourish in the shade of trees. They even mix well with many other types of woodland wildflowers such as woodland phlox, columbine, wild geranium, and golden ragwort, and Short’s Aster. You can find these companion plants along with the aforementioned sedges at our FloraKansas Fall Plant Sale. Each of these low-growing sedges are delicate with arching leaves that are very appealing as ground covers. In my opinion, they are definitely worth trying.