By Susan Harkins

Thank you to Connie May, Jonathan Kubesch, and Nick Koenig for sharing their technical expertise on milkweed.

The monarch butterfly, Danaus plexippus is now a candidate species for the Endangered Species Act. Habitat loss and pesticide use along their migratory routes are responsible for the decline of the monarch, but you can help by providing habitat in your own yard. You’ll need two things: nectar for the adults and milkweed (Asclepias) foliage for their caterpillars. By planting both milkweed and other native wildflowers, my yard turns into a five-star resort for not only monarchs, but other butterflies and moths, beneficial insects, and birds.

Plant a patch of native wildflowers to attract adult butterflies and milkweed for their offspring. The monarch caterpillars eat only Asclepias. Kentucky Asclepias species that easily make the move to home gardens are:

By planting both milkweed and other native wildflowers, my yard turns into a five-star resort for not only monarchs, but other butterflies and moths, beneficial insects, and birds.Despite its common name, swamp milkweed (Asclepias incarnata) will grow in most yards, though it will only reproduce reliably in wet spots. Be prepared to reseed or replant every few years to keep it going. Its deep-rose blooms are more spray-like than clusters and makes a stunning border for a larger area. It won’t spread to other areas, but it will fill in an area nicely.

Butterfly weed (Asclepias tuberoses) has the most spectacular color—bright orange. It’s a bit bushy, grows 2 to 3 feet, and likes a sunny spot. It looks lovely planted with rue. Butterfly weed is the most dependable for returning in the same spot each year, but it doesn’t spread quickly. The leaves are thin, and I find few eggs or caterpillars on them, but the adult butterflies and other beneficial insects feed on the blooms. Butterfly weed blooms persist longer into the late summer than other milkweeds. Plant a few for a bright pop of color or create a spectacular border. Once they’re established, they’re very dependable.

Plant whorled milkweed (Asclepias verticillata) for fragrant blooms and interesting green foliage. It’s easy to establish from seedlings and like butterfly weed, whorled milkweed grows 2 to 3.

Of the five species reviewed, green milkweed (Asclepias. viridis) has proven the hardest for me to establish in a garden setting. It grows wild in every direction at my friend’s farm, so I keep trying. I encourage you to do so too because it’s so worth it! Its showy blooms are similar to common, but green, and the plants are shorter.

This article is about species that will work well in your home gardens. I don’t recommend that you plant common milkweed (Asclepias syriaca) in your yard. I include it to be comprehensive, but it’s beautiful in a big field far enough away that it doesn’t breech your landscaped yard.

In bloom, common milkweed is gorgeous and fragrant. Plant enough to cut some of those showy dusty-rose clustering blooms to bring inside because the scent is seductive. It prefers a sunny, well-drained spot and can reach seven feet. It spreads aggressively and dislikes intensive management. To be happy, plant it and plan to leave it be, keeping in mind that the caterpillars will completely defoliate it—another reason not to put it in your yard.

There are other species native to Kentucky, but these listed have proven most successful for me. I encourage you to explore the other species and experiment! The more you know about milkweed, the more successful your efforts will be. Common, swamp, and butterfly are readily found in nurseries in the spring. Seeds for all can be purchased online and at nurseries.

By Susan Harkins

Kentucky doesn’t have many winter-hardy wildflowers, so gardeners plant non-natives—daffodil, crocus, and hellebore mostly—to brighten up their early spring yards. By the end of February, I’m crabby and needing a respite and those early blooms sooth my soul and remind me that within a few weeks the world will be warm and full of color again. Daffodils bridge the gap between my “I’m going to die…” stage and “Ah! Spring!” You don’t have to rely on non-natives though, thanks to Hepatica.

Hepatica isn’t Kentucky’s earliest native bloomer. That distinction probably goes to Symplocarpus foetidus, commonly known as skunk cabbage or polecat weed. Unless you have a shady bog to fill, you probably can’t rely on skunk cabbage to scout out spring. The next earliest native bloomer is Hepatica. By mid-April, they’re everywhere, but I’ve spied them earlier.

If they bloomed any later, these small delicate flowers would be totally overwhelmed by the riotous outbreak of warmer spring colors. Somehow, they arrive at just the right time.

Kentucky claims two varieties: Hepatica americana and Hepatic acutiloba. You might once have known this native as Hepatica nobilis, but that is the European species and it no longer applies to our Kentucky species.

Botany

Tiny hairs protect the tender buds that often push through late snow. If you examine them closely, they look fuzzy, as if they’re wearing fur caps for protection. Hairs also protect the stems and leaves, and it’s possible the hairs help retain heat. They are “evergreen,” living a full year.

Blooms appear in a variety of colors: white, pink, lavender, purple, and blue. Their “petals” are actually sepals held in place by three bracts. The number of sepals varies, and they last for weeks. Heart-shaped leaves grow at the stem’s base. Hepatica means liver in Latin, and the name is derived from its liver-shaped winter leaves. That also explains its common names, liverwort and liverleaf.

Once the sepals die, a set of new leaves emerge to continue soaking in the sun’s ray, storing up energy for next spring’s early blooms. As winter moves in, the leaves darken until they seem to disappear, but they’re ready to start photosensitizing with spring’s first hint of sun. That “evergreen” leaf is the reason Hepatica can bloom so early in the spring.

You might wonder how this flower pollinates considering how few insects are out and about in early spring. Cross-pollination by an insect, such as solitary bees, is preferred, but this plant is autogamous–it can fertilize itself!

In your garden

Besides keeping you sane until spring truly erupts, this little beauty makes a lovely garden plant. Once established, they spread quickly and form little clumps of flowers that are a sweet complement to crocus and other non-native spring bloomers.

Plant Hepatica in a moist rich soil that receives only a few hours of sun (not full shade). Because they can so easily be obscured, plant them in mass or among ornamental rocks. They need good air flow to prevent leaf spotting.

Fortunately for gardeners, Heptica grows easily from seed. The small seeds are ready to collect in late spring; if the seeds aren’t easy to remove, they’re not ripe. It’s easier to cut the entire star-shaped seed cluster into a bag than to collect only the seeds because of their small size. The seeds are still green when ripe and need a period of warm stratification, followed by cold stratification before they will geminate. For that reason, I recommend that you sow them immediately.

Seeds germinate and produce seed leaves the next spring. They’ll produce flowers their second year, so plan ahead. If you’re germinating in flats, prepare to keep them for two years before transplanting.

Whether you’re a native purist or simply looking for a bridge into spring, consider Hepatica. It’s so delicate that it hardly seems possible that it has survived the harsh winter, but year after year, it not only returns, it celebrates, and we celebrate in kind.

By Susan Harkins

A few summers back, I stopped outside a local nursery to admire a huge pot of Sporobolis heterolepis, commonly known as prairie dropseed. I gently caressed the long thin green leaves and tiny brown seeds. Not only was the tactile sensation comforting, the released fragrance, similar to cilantro, was mesmerizing. It grows in my yard, but I thought to myself then that the next year I would have a pot of dropseed on my porch. Someone knew what they were doing when they positioned that pot of dropseed at the entrance to the store.

This native grass is aptly described as an elegant fountain. Its fine-textured arching leaves grow up and curve down toward the earth. Loose branching clusters of airy florets produce tiny fragrant brown seeds. This time of year, when our fields and yards are a blaze of yellow and purple, dropseed offers lovely spots of gold, orange, and pink.

Botany

Sporobolis heterolepis is a warm-season deciduous bunchgrass, which simply means it grows in clumps. The 3 to 8 inch panicle comprises multiple branches that terminate in small spikelets. A single floret has three reddish anthers and a short feathery stigma when in bloom. Once pollinated (by wind), the floret produces a mostly round small seed in a hard hull. It’s a dense turf with alternate basal leaves.

Culture

This drought-tolerant native prairie grass is often used to fight erosion and control water runoff because of its deep fibrous root system. As you might expect, it grows well in dry soil and full sun. Because it tolerates heavy clay, it’s a good species for Kentucky gardens. It also grows in glades and open areas left by human development.

I’ve found that this perennial likes a bit of room. If too crowded, they don’t reach their normal 2 to 3 feet in height and spread.

Propagation

Seeds are best collected in October before they drop from their hulls. They germinate in cool weather so sow in the late fall or early spring; they require stratification if sown in the spring. (An easy stratification method is to sow in dry soil for at least ten weeks.) Although Sporobolis heterolepis grows easily from seed, it’s not a prolific self-seeder, so don’t expect it to fill in as ground cover. Division is possible, but difficult because of its dense root system. Many experts recommend divisions over seeds, but I’d rather seed heavily or buy mature plants than take a chain saw to the roots because that’s the only way I’d be successful!

In your garden

Due to its late blooming florets, this species is a fall beauty, and its arching leaves lend elegance almost year round. Snow doesn’t flatten the leaves and the graceful leaves and seeds poking through a new snow are lovely.

Plant in mass or as a single focus point. However, I don’t recommend them as a formal border because this species is diverse in form from plant to plant. They’re not a cookie-cutter plant. Plant 18 to 24 inches apart and don’t crowd them. It can hold its own against Andropogon gerardii, big bluestem, and Sorghastrum nutans, Indian grass, but don’t allow nearby taller plants to block the sun; placement is important when combining Sporobolis heterolepis with taller prairie grasses.

Patience is a virtue, so they say, and you’ll need it with this species when growing from seed or plugs. It takes nearly five years to fully develop from seed, so I recommend buying large plants if you want a quick display from this plant. Once established, this grass requires little care, but keep it well watered the first year. Dethatch it once a year and remove weeds; that’s it!

If you garden for wildlife, the seeds persist into winter providing food for birds. Its clumping nature provides habitat and protection for birds and small mammals and nesting material and shelter for native bees.

Although it’s slow to establish, Sporobolis heterolepis is one of the showiest bunch grasses. It fits into almost any landscaping theme, from formal to rustic. It’s a great plant for restoration projects and is trouble free once established. But for me, the fragrance is its most endearing quality—put a pot on your porch and enjoy.

By Susan Harkins

As the song goes, June is busting out all over! No month is kinder to Kentucky wildflowers than June. The delicate and often elusive ephemerals have given way to an abundance of rambunctious textures, colors, shapes, heights, and fragrances. If you love wildflowers, you have to love June. Maybe that’s why so many brides choose June—it’s all about the bouquet! A spectacular bouquet will include Baptisia australis. Regionally, you might know this species as wild blue indigo or false blue indigo.

There’s something magical and exotic about this flower—its structure is so different from what we usually see in our gardens. I expect to see fairies flitting about as the sun sets and the moon begins its climb into the night sky. I tell my grandchildren if they want to see fairies, that’s the flower to watch.

Botany and wildlife

Baptisia is in the legume (Fabaceae) or pea family, which explains the bloom’s departure from the more familiar trumpet and ray flowers. In addition, Baptisia has both male and female flowers. The blooms mature from the bottom up, and the older female flowers produce lots of nectar. Blooms toward the top of the stalk are pollen-rich males.

A bumble bee travels to the preferred lower flowers, seeking their nectar prize. The bee grasps the female’s pistils and thrusts itself inside the bloom. Eventually, the bee makes its way up the stalk, reaching the male flowers. This same propelling action brushes the pollen-covered anthers across the bee’s abdomen. After reaching the top, the bee flies to the female flowers at the bottom of the next stalk, depositing its pollen onto the female pistils.

The blooms also attract butterflies and hummingbirds, and Baptisia is the only known host of the Wild Indigo Duskywing (Erynnis baptisiae) butterfly.

Another native Baptisia is Baptisia alba. It’s similar in every way to australis but its blooms are white. There’s a yellow variety, Baptisia sphaerocarpa, but it isn’t native to Kentucky.

Culture

When Mary Carol Cooper gave me my first Baptisia, she advised me to find a sunny spot and leave it there. They grow a long taproot and don’t like to have their roots disturbed. Besides, you might not be able to move it even if you decide to. Established plants resemble asparagus when they break ground in early spring but underneath, the roots are woody. I’d describe the roots as a steel octopus. Established Baptisia is almost impossible to dig up without superpowers.

They prefer fun sun but will tolerate a bit of shade. They’re very forgiving in their water needs, so go for sun first, then water. However, they need well-drained soil. Steer clear of high pH soils or amend the soil regularly if necessary. Baptisia blooms from April to July. If they stay small and the leaves are a bit yellow, pH might be your problem. They take a few years to produce volumes of blooms, but they are worth the wait.

Propagation

Given Baptisia’s rooting disposition, division isn’t a great method of propagation. Cuttings will root but few will sprout the next spring.

Seeds are the way to go. To collect, wait for the pod to turn brown or black. Blooms persist toward the top while pods ripen along the bottom. Fortunately, they hang on to the plant for weeks so they’re easy to find. Store dry seeds in the refrigerator. They’re easy to germinate and require only 10 days of cold moist stratification and then scarification in hot water. Plant about ½ inch deep.

Because Baptisia is a legume, it requires microorganisms that inhabit nodules on the plant’s root system. If you’re purchasing a healthy plant, don’t worry about it. You might never need to know this, but it can’t hurt to tuck away this bit of botanical trivia in your brain’s gardening section.

In your garden

In nature, you’ll find Baptisia along moist woodland edges and prairies. In your garden, give special care not to crowd them. They grow large and bushy so give them lots of room. The blooms are small, but the volume creates a showy vertical display. You might want to surround them with a bit of ground cover but don’t ask them to compete with another showy plant.

This bushy perennial grows from two to four feet from its woody base. While not a shrub, one plant can spread to three feet. One Baptisia is beautiful and three make a breathtaking display. However, in my opinion, a mass planting loses its visual impact because you see only the color and not the individual, and spectacular, plant.

Baptisia of any color provides both height and depth to any sunny garden spot. It’s spectacular as a focus spot or in a perennial border with other natives. After blooming, its blue-green foliage makes a nice backdrop for later bloomers and persists into cooler weather as do the dark seed pods.

When purchasing plants, look for older plants that are blooming; from seed, this plant takes three years (and patience) to produce flowers. Give Baptisia what it needs, and not only will it take center stage, but it will also be hearty—to the extent of being almost indestructible.