New Plants around the Grounds

I recently spoke at the Oklahoma Native Plant Network fall festival in Oklahoma City. They had a day full of speakers, including representatives from Tulsa Botanic Garden, the Xerces Society and Bat Conservation International. But the real treat of course was the plant market outside the presentation hall. So many great native treasures were available from local vendors, I couldn’t resist buying a few new plants. I was able to get a few hard-to-find species for installation on the Arboretum grounds. Keep an eye out for these beauties on your next visit.

Callicarpa americana var. lactea – White American Beautyberry

Photo provided by the grower, Wild Things Nursery of Seminole, Oklahoma.

I didn’t even realize a naturally occurring white variety of beautyberry existed until I saw it being sold by Wild Things Nursery at the ONPN event. All the same lovely characteristics as its purple cousin – shade tolerant, pollinator friendly, bird attracting – but with striking white berries on arching stems. Marilyn, the owner of Wild Things Nursery said she collected the seed over twenty years ago down a shady dirt road in north western Arkansas. According to her they come true from seed reliably. Beautyberry are marginally edible, though not very tasty. Find these new additions in the back of the Compassionate Friends Garden near the hedgerow at the arboretum.

Hibiscus laevis – Halberd-leaf Rosemallow

Our pond has several lovely Hibiscus moscheutos thriving along its edge, and I am excited to add H. laevis to the mallow collection. This is a slightly taller species with narrow leaves, as the name implies, in the shape of a medieval sword. Native throughout the eastern half of the US, though much of its wetland habitat in the mid-Atlantic has been disturbed. Sadly, it is not as commonly found as it once was. I’ll be planting this on tip of the island, where there is some space on the banks thanks to our latest renovation. I found this at a great plant at a vendor called Duck Creek Farms from Mounds, Oklahoma.

Native Range of H. laevis, according to USDA plants database

Wisteria frutescens – American Wisteria

Anyone who has seen the opening scenes of Bridgerton house on Netflix’s hit show will recognize the pendulous purple blooms of Wiseria vine. But most of the Wisteria you see in media and in formal landscapes is the asian variety. Beautiful, but at a price: invasive in certain parts of the country and downright pushy in the garden, it needs diligent trimming to keep growth in check. But native W. frutescens is a great alternative to its exotic cousins, and with plenty of color to spare. I’ll plant this next spring near a leg of our new octagonal gazebo soon to be erected in the Birdwatch Garden.

Shop Til You Drop

Photo by Sue in az, Public domain, via Wikimedia Commons

In between shopping for the Arboretum, giving the keynote presentation of the festival, and networking with all the like-minded conservationists and plant peddlers, of course I also snagged a few things for my own landscape! I found blackfoot daisy (Melampodium leucanthum) for a hot, dry spot near my front sidewalk. I also found an adorable spineless cactus (possibly Optunia ellisiana?) to plant nearby. Here’s hoping these cuties fill in the rather inhospitable space between my purple prairie clover and creeping sedum.

If you are in the area, put ONPN’s fall festival on your radar for next year. It was a great time to learn about native plants and related topics in conservation. And you will never see me turn down an opportunity to buy plants and support small growers!

Messy Trees

I love this time of year. Cool mornings and warm afternoons are a welcome break from the heat of summer. This time of year also reminds me that not all trees are the same. Some have beautiful fall colors of orange, red, yellow and purple while others shades of tan and brown. Once the leaves drop from the trees, the fruit stands out even more.

We also quickly realize that some trees are “messier” than others. Whether it is the leaves that drop, the fruit that drops or the sticks that litter the yard, trees are constantly dropping something. Sure, there is not a perfect tree that magically cleans up after itself, but there are some trees to avoid planting in certain locations within your landscape if you have a choice. Here is a list of trees to think twice about planting in your landscape.

Sweet Gum (Liquidamber styraciflua)

This ornamental tree is primarily grown for its brilliant fall color of oranges, reds, yellows and purples. It can be quite stunning, but it also produces copious amounts of spiky gum ball fruit. My in-laws had one of these growing in their front yard and it was a prolific fruit producer that they complained about every year. Like most messy trees, it has its place in the landscape, but not in a place where your grandchildren will be walking barefoot.

Sweet gums have great fall color, but spiny fruit

Catalpa (Catalpa speciosa)

The large heart shaped leaves of this native lowland tree along with the fluffy white blooms in the summer can be reasons to have this tree in your landscape. However, the long cigar shaped seed pods and thousands of catalpa caterpillars are major drawbacks. I have one of these trees in my yard in a low spot that has standing water when it rains. I can appreciate the blooms from a distance but in the fall, I do have to collect the large leaves so they don’t smother my lawn.

Catalpa heart-shaped leaf with long cigar shape fruit pod

Cottonwoods (Populus deltoides)

These trees are notorious for dropping sticks and debris throughout the year. The fluffy cotton clogs up air conditioner units and seedlings sprout up any place with constant moisture in the spring. They are also susceptible to many diseases and insect pests. As our state tree, their native habitat is along rivers, streams and ponds. Their roots are typically shallow, buckling sidewalks and driveways. My colleagues have been lobbying to cut one of these down that currently grows on the edge of our prairie.

Black Walnut (Juglans nigra)

This tree is often found along prairies, stream margins and fencerows. While native, you should avoid planting a black walnut along streets and driveways. The round, hard nuts will stain concrete and they are tripping hazards. The fruit and foliage can be quite pungent as well and the leaves are a favorite of walnut caterpillars. These pests can become so numerous that they will totally defoliate the tree. It also produces a toxic compound that can kill other plants you are trying to grow around and under its canopy. Leave it in the wild and go to it to collect the black walnut fruit if you like to eat them.

Oaks (Quercus sp.)

I hesitated including oaks in this list, but then I looked at my back deck, currently covered with tiny acorns. We value oaks for their long life, shade, hardiness, fall color (sometimes), and wildlife attraction to our yards. In fact over 900 species of winged insects rely on oaks for their life cycles, not to mention birds and other wildlife. If you plant one of these mighty oaks in your yard, just know that you have to take the good with the bad. In my case, the good far outweighs the bad.

Pin oak acorns roll around my backyard like marbles, but at least the squirrels are happy.

Ginkgo (Ginkgo biloba)

The ginkgo tree is a living fossil with distinct fan-like leaves. The beautiful yellow fall color and hardy disposition make it a much sought after street tree. However, there are male and female trees. The female trees produce a fruit that is both messy and smelly. Some liken the fruit smell to rotting flesh. If you really want a ginkgo in your landscape, seek out one of the many male varieties.

Other obvious trees to avoid

Bradford pear, mimosa, Goldenrain tree, silver maple, Norway maple, weeping willow, river birch, Siberian elm, tree of heaven, mulberry, black locust and Russian olive.

Choose Wisely

As I said earlier, there are no perfect trees. We view some trees as “messy” because they require us to repeatedly clean up the yard. Every tree drops something, but messy trees with stinky, messy fruit and large branches that can damage your house or pests are more problematic. If possible, do your research before planting so you know what to expect as the tree matures. To get good shade, you might have to put up with some messiness. If you are stuck with a messy tree, either embrace its faults by regularly cleaning up the mess or choose to have it removed.

As you know, trees in Kansas are a luxury, so think carefully before removing a mature tree. The downsides of a mature tree needs to far outweigh the upsides. In the case of my 60 year old oak trees that frame my backyard, I regularly pick up fallen branches and routinely blow off my deck and sidewalks of acorns and leaves. I have come to appreciate these trees because they attract so many different forms of wildlife, provide shade, and add to the diversity of my entire landscape.