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The All-American Yard

Summertime, and it’s the 4th of July! American Independence Day!

We love celebrating the Stars & Stripes — flying the flag, draping patriotic bunting on the porch, and decorating everything with red, white, and blue.

But wait! Is your landscape part of the theme? Is it proudly American? Or is it decorated with English Ivy, Norway maple, Chinese silver grass, New Guinea impatiens, Korean dogwood, and Japanese honeysuckle? It’s a shame that so many suburban landscapes today are decidedly…. un-American!

Look around your neighborhood.

Do you see big open lawns extending right up to the house? That’s 19th Century British style!

In the 1800’s, British aristocracy used cheap manual labor to maintain expansive lawns in a display of wealth and power.

Are there yards in your neighborhood with tightly-clipped evergreen shrubs arranged in rows? That style goes all the way back to 17th Century France!

French royalty favored shrubs clipped into artificial shapes

Should we really be trying to copy that?

It’s funny if you think about it!

American history is closely tied to wilder, natural landscapes and a vast bounty of beautiful and useful plants. Those plants tell our American story!

For example, if you have an Eastern Red-cedar (Juniperis virginiana) in your yard, you should know that in 1584, English explorers were so awed by the incredible beauty and fragrance of Roanoke Island’s Eastern Red-cedars, they decided to make Roanoke the very first colonial settlement in America.

Many of our best native landscape plants today were critical to the life and survival of early American settlers. They used Witch-hazel (read more here & here), Arborvitae, Bee Balm, and hundreds of other plants for medicine. They learned which native plants were good for food and which were useful as building materials. They used native plants to improve their lives — native junipers made good pest repellents, and Bayberry scented their candles and removed odors in their homes.

The common names of many native plants still tell us so much about our past. In New England, colonists relied on the bloom time of Amalanchier shrubs to alert them to the beginning of the shad run as fish started migrating up-river from the sea, so they called the plant “Shadbush.” In other towns, settlers called the same plant “Serviceberry” because its bloom time marked the season when traveling ministers who performed wedding and funeral services could begin using local roads again as the snow melted. Those uses may be gone, but the names still link us to our history.

Amelanchier, “Serviceberry” or “Shadbush”

You could show your patriotism on Independence Day by planting a White Pine in your yard. Before the Revolution, the English Crown claimed exclusive use of all American White Pines for the British Royal Navy for ship masts. The Crown’s over-reach triggered the first violent protest by Americans against the British, which likely served as inspiration for the Boston Tea Party. In another practical act of rebellion, colonists started making their own ink and cloth dyes from Pokeweed, an American plant, thereby avoiding British taxes on imports.

Indigenous people introduced colonists to Joe Pye weed as an effective treatment for typhus, and so it was named for a highly-respected indigenous leader. Amsonia or Eastern Blue Star was named for a physician who once treated George Washington, and two early American botanists named their discoveries of indigenous woodland plants, Jeffersonia diphylla and Franklinia alatamaha, after our founding fathers. Both Thomas Jefferson and George Washington were hobby botanists, and when Washington lost interest in European plants, he began collecting and growing native American Redbud trees, among others, for his own estate.

Cercis canadensis or “Redbud”

From the first Thanksgiving through the War of Independence, America’s native plants supported settlers and, quite literally, built America. But today, as more Americans have moved to suburban areas, landscapes composed mostly of lawn grass, with a few tightly-clipped, non-native shrubs, have become standard.

The default suburban landscape today

The resulting loss of insects, birds, and wildlife is well-documented and tragic. By eliminating pesticides, reducing lawn, and planting native trees, shrubs, grasses, and perennials, homeowners and gardeners can help save and rebuild American biodiversity.

But we can also reclaim American history! Learning about native plants teaches us about our past. The best landscapes give us a sense of place and connect us to what is truly American.

Suburban landscapes with native plants

Let’s celebrate the 4th of July by planting a few great American plants! Many have been featured in this blog over the past several years. Maybe the Goldenrod called ‘Fireworks’ would be appropriate?

Solidago rugosa ‘Fireworks’

So, buy American! Plant American! Go USA!

Baptisia: It Will Return!

“Perennials” are plants that come back every year… at least in theory. In reality, some perennials are short-lived and only come back for a few years. Others may come back every year, but not necessarily where you planted them – they pop up in other places, or dramatically expand their territory. Some perennials need to be divided (split at the roots) to stay vigorous, or they will languish and stop blooming.

Baptisia (“Wild Indigo” or “False Indigo”), on the other hand, is truly perennial. There are documented cases of gardens, abandoned and neglected for over 30 years, where the only remaining original plant was Baptisia – still growing right where it was first planted, and still blooming.

Baptisia australis (Blue Wild Indigo) in spring

Baptisia is as beautiful as it is durable. It sends up vertical stalks loaded with flowers in May and June. All summer long, it acts like a shrub, 3 to 4 feet tall and wide, with blue-green foliage that remains fresh even in the hottest weather. In the fall, it produces attractive pods that add seasonal interest. The whole plant dies back to the ground after a few hard frosts, remaining unharmed by snow mounds or road salt throughout the winter. In spring, this reliable perennial definitely returns.

Baptisia australis flower

Baptisia evolved growing in open meadows and prairies. It is in the legume family, which explains the sweet-pea shape of the flowers. Like other legumes, Baptisia is nitrogen-fixing. Essentially, the plant manufactures its own nitrogen fertilizer, so it can live in very poor soil. Baptisia roots can extend 7 feet deep, even into hard-packed prairie, so it is drought tolerant.

Though Baptisia is easy to find in plant nurseries, you may be inclined to give it a pass when you first see it. It looks a bit like purple asparagus coming up in early spring. Because of its deep roots, nurseries can offer only very young plants, but a small plant will fill out dramatically after two or three years in the ground.

A one-year old Baptisia australis in the Pollinator Garden at the Nature Center

Baptisia is very low maintenance. It never needs dividing. In fact, once its deep roots are established, it really should not be moved or divided. The best bet is to buy container plants and give them enough room to mature undisturbed. Note, however, that the one non-negotiable for Baptisia is sun – 8 to 10 hours a day. Even very long-established plants will begin to fade if they become shaded by trees and shrubs. So, plan ahead when deciding where to site Baptisia.

A 15-year-old stand of Baptisia plants in mid-June

There is a lot to choose from in the Baptisia family these days – at least 3 garden-worthy species, plus hybrids and cultivars. Here are a few favorites:

Baptisia australis, or Wild Blue Indigo, is a species native to New York and always our first choice. Its natural habitat varies from moist woodland edges to open prairie. Its original native range extends south as far as Georgia and west from Nebraska to Texas. It likes our acidic soil, and is hardy in Zones 4-9. It is not generally attractive to deer, and it is the host plant for the Wild Indigo Duskywing butterfly.

Baptisia sphaerocarpa (Yellow Wild Indigo) is not native to New York, but is native farther west and south from Missouri and Oklahoma to Texas. Baptisia alba (White Wild Indigo) is native in the Southeast from Virginia to Florida. Both of these Baptisia species are winter hardy to Zone 5, and do well in New York gardens.

Baptisia sphaerocarpa (Yellow Wild Indigo)
Baptisia alba (White Wild Indigo)

Interestingly, these three Baptisia species have yielded natural hybrids resulting in some very beautiful flower color variations. Hybrids called ‘Purple Smoke’ and ‘Twilight Prairie Blues’ are often available and seem to perform as well as the species.

Hybrid Baptisia ‘Twilight Prairie Blues’

New cultivars have been developed by growers and are sold under various names such as ‘Lemon Meringue,’ ‘Dutch Chocolate,’ and ‘Cherries Jubilee.’ Whether these cultivars provide the same benefits to wildlife as the species is unknown.

So, if you want a true perennial that will come back every year, never need dividing, never need fertilizing, and will be beautiful for many years to come, try Baptisia!

Wild Yellow and Wild Blue Baptisia in the garden
THIS BLOG IS AUTHORED WEEKLY BY CATHY LUDDEN, CONSERVATIONIST AND NATIVE PLANT EDUCATOR; AND BOARD MEMBER, GREENBURGH NATURE CENTER. FOLLOW CATHY ON INSTAGRAM FOR MORE PHOTOS AND GARDENING TIPS @CATHYLUDDEN.

Early Bloomers: Native Perennials For Spring

“April cried and stepped aside, and along come pretty little May”
-Rogers & Hammerstein

April’s daffodils are fading, but May is the best season for flowers! Are you ready for spring planting? Plant sales are happening all around us. Let’s make a shopping list!

This year, consider skipping the big box stores and garden centers selling flats of annuals for flower beds. Who really wants to watch tropical plants (wax begonias, New Guinea impatiens, petunias) wither and die in our very un-tropical weather? If you are going to all the expense and trouble of planting flowers in your yard, why not choose a few of these native perennials that can withstand our variable climate and come back strong next year?

Here are some great early-blooming native perennials that start to shine just as the daffodils fade from view:

Zizia right now!

In a sunny area, try Golden Alexander (Zizia aurea or aptera). With masses of big yellow flowers, Zizia looks just like sunshine. It is in the carrot family and is the native host plant for Black Swallowtail butterflies. If you plant it, you will definitely see them. The plants spread themselves around where they are happy and are easy to grow. Never more than 2 to 3 feet tall and about 2 feet wide, blooming from late April well into June, Zizia tolerates a little shade, but does best in average garden soil with a mostly-sunny exposure. And it is deer-resistant.

Do you usually plant annuals along your front walk? Try these early-blooming native perennials instead:

Moss Phlox (Phlox subulata)
blooming now
Prairie Smoke (Geum triflorum)
blooming now
Pussytoes (Antennaria plantaginifolia) blooming now

Prairie Smoke blooming in late May

Moss Phlox or Creeping Phlox is widely available and popular –for good reason! It blooms profusely from late April into May and is available in a huge array of colors, from white and pastel or hot pink, to a variety of blues. It needs full sun and sandy or pebbly well-drained soil, so it is perfect for lining a sunny path where the soil tends to be poor. After blooming, it forms a weed-suppressing, green, mossy clump that stays through the winter and reliably blooms again the next spring.

Pussytoes and Prairie Smoke also work along concrete, gravel, or masonry paths, and for the same reasons. They don’t mind the thin rocky soil typically remaining after construction of paved surfaces; they don’t mind reflected heat and cold from pavement; and they tolerate drought and salt better than most garden plants. See our post on these and other great plants for walkways here.

Jacob’s Ladder (Polemonium reptans) blooming now

How about an early-bloomer for shade?

For a fabulous front-of-the-border plant in dappled shade, or a great choice for underplanting trees, try Jacob’s Ladder (Polemonium reptans). It is one of the very first plants to break ground in the spring, and within a couple of weeks, it is covered with light blue flowers that are magnets for the first bumblebees emerging from hibernation. The foliage stays green all summer and has interesting leaves spaced evenly along the stem inspiring the name “ladder.” There are some tempting cultivars of Jacob’s Ladder on the market with variegated or multi-color foliage, but they seem to suffer in Northeastern winters. The old-fashioned Jacob’s Ladder species is not only reliable, but spreads slowly to make a lovely ground-cover.

Two other early bloomers for shade are Woodland Phlox and Wild or Spotted Geranium.

Woodland Phlox (Phlox divericata) blooming now

Woodland Phlox is a true woodland species, preferring humusy soil where leaves are allowed to stay on the ground and decompose naturally. It loves the even moisture of a shady wooded area, but does well in cultivated shade gardens with rich soil and good drainage. Colors range from nearly white to pale pink or true blue. Grow it under mature trees and shrubs where fallen leaves provide winter cover and summer moisture protection. It blooms early and is a great native replacement for vinca. Rabbits may hit young plants, so a repellant is advisable.

Wild or Spotted Geranium (Geranium maculatum)

A favorite early-blooming native for part-shade, Geranium maculatum is a total winner. It blooms on and off for months and the leaves are beautiful all season long. It’s a great edge plant between lawn and taller shade perennials and will form substantial clumps growing slowly from the crown, and even occasionally sending seedlings into nearby areas. The flower colors are soft pastels that seem perfectly at home in dappled shade or morning sun.

Fringed Bleeding Heart (Dicentra eximia) blooming now

If there is one early bloomer that will capture your heart, it is this one. Dicentra eximia starts blooming with the daffodils in early April, and will still be blooming in October! The lacy fern-like foliage forms a soft mound about a foot high and wide, though older plants may be 18 to 24 inches tall. The flowers are suspended like charms on slender stalks just over the leaves, each cluster lasting a week or more. Fading flowers still look good as they gradually turn white, so dead-heading is unnecessary to keep the plant looking fresh all summer. Deer and rabbits ignore Fringed Bleeding Heart, but it is not a strong competitor and can be overwhelmed by thugs like ivy and vinca. It is happiest in part sun and very well-drained, even rocky or sandy soil. Too much moisture or heavy soil will shorten its life-span. Unlike the Asian bleeding heart, Dicentra eximia will not disappear after blooming, and it is surprisingly tolerant of drought. For more information click here.

So, check out your local native plant sales, or visit a good nursery that carries a varied selection of perennials. Some of these plants are available at garden centers if you know what you’re looking for – check the Latin names to avoid mistakes and non-native hybrids.

And if you plant these early bloomers now, you will see them again next spring and, hopefully, for many springs to come!

Wait! Hold Off on Your Spring Clean-Up!

A day or two of warm sunshine in early spring makes us all eager to clean up the mess left by winter. We are so ready for spring that we just can’t wait to make our yards neat and tidy.

But wait! Resist the urge! Leave the leaf blower in the garage a little longer. Don’t rake the leaves from under your trees and shrubs. Don’t cut down your ornamental grasses and perennials. And don’t turn over the soil in your flower beds just yet. If you can be a bit more patient, the pay-off is enormous!

A lot of important stuff is happening in your yard in early spring, and you really should let it happen undisturbed.

Beneath all those dead leaves, pine needles, and broken twigs littering our yards, the roots of landscape plants are just waking up. Winter debris actually protects roots and tender new growth, providing essential insulation during the transition from winter to spring. Exposing those roots to unpredictable cold snaps and icy winds is asking for trouble. In addition, leaving soil bare only encourages weeds to develop before landscape plants have a chance to leaf out and shade surrounding soil.

Early spring storms and freezing temps can harm exposed roots

And there are other important things happening under the mess. As the weather gets warmer, butterflies over-wintering in fallen leaves and plant debris begin to emerge. How tragic is it that the prettiest butterflies of early spring are being carted away by lawn crews or left to die in leaf bags at the curb?

Mourning Cloak butterflies survive the winter in brush piles and leaf litter. They emerge early, but only when temperatures are warm enough. Don’t lose them by cleaning up too soon!

Birds that have survived the winter, or arrived after long migrations, are desperately looking for food in the lean stretch between winter berries and summer insects. As weather warms, caterpillars and other insects hatch in leaf litter where birds scratch around to find them. Clearing those leaves away too early means loss of critical food for birds just when they need it most.

In early spring, a White-throated Sparrow hunts insects in leaf litter

Native bees and fireflies also nest over winter where leaf litter covers the top inch or two of soil. Removing the protective leaf cover too soon exposes them to the cold. Turning over the soil too early destroys the nests, causing the death of essential pollinators, as well as summer’s fireflies.

Firefly larvae spend the winter in topsoil protected from freezing by a cover of leaves

So, what is the right time to begin spring clean-up? There is legitimate debate in ecological gardening circles about this topic. One school of thought is to wait until temperatures are regularly in the 50’s, allowing most ground-dwelling insects to emerge. Others note that many species of valuable insects emerge much later in the season, and some insects that nest in the hollow stems of perennials may even need more than one season to complete their life-cycle. Those experts recommend leaving some portion of un-cut or partially cut flower stems standing from season to season, never cutting all of them to the ground. All experts agree that leaving as many fallen leaves, and as much undisturbed soil, as possible — for as long as possible — increases survival rates of insects and birds.

The best approach is to adopt different clean-up strategies for different habitats. If you have a wooded area, let the leaves stay there indefinitely. “The best place for leaves is under the tree they fell from,” according to Dr. Doug Tallamy. And if you can’t wait to blow or rake dead leaves from hardscape and lawn, simply move them to wooded areas and spread them under trees and shrubs to preserve all of their ecological value on your property. If there are just too many leaves to make that possible, find an area where you can pile leaves loosely until it’s time to compost them. And don’t worry about clearing old leaves away from perennials in wooded shade gardens. After all, native shade plants evolved growing in forests. They have no problem emerging through leaf litter when they’re ready.

Early native perennials, like Jacob’s Ladder, happily emerge through the winter leaf cover
Trillium
Native columbine

If you have sunny areas where you’ve planted flowering perennials and ornamental grasses, always leave them standing over winter. Then, wait longer than you think you should before cutting them back in the spring. If you wait until mean temperatures are regularly at least 50 degrees, the roots of your plants will be protected from late cold snaps and heavy spring rains, and you will be giving songbirds a better chance to grab the last seeds and earliest emerging insects. Leave a few stems of each perennial, especially the hollow stems, cut a foot or two above ground level, for nesting bees at the end of summer. New growth will soon cover the bare cut stems.

Not yet! Wait a little longer to cut everything back.

If you find you have too much plant and leaf debris to keep in existing areas of your yard, don’t send it all away. Consider turning part of your lawn into an expanded planting area in the new season. Mark off a new garden bed, add an edger, and pile the plant debris there to smother lawn and enrich the soil for the trees, shrubs, or native perennials you want to add this summer. By the time you’re ready to plant, you’ll have a good head start preparing the new beds.

So, relax for a few more weeks each spring! Thumb through garden catalogues, scout the local native plant sales, and plan your new yard projects for the summer. If you use a professional landscape crew, save a few bucks and tell them to start later. Their work schedule doesn’t have to determine your garden schedule.

We’re all eager for spring. You’ll know it’s here when you start seeing bumblebees buzzing around and realize you haven’t needed a jacket to go outside for a whole week. That’s when spring clean-up season is finally here!

The All-American Shamrock

Legend tells us that St. Patrick used a shamrock, with its three leaves on a single stem, to teach ancient Celtic peoples about the Christian trinity. There is no agreement among historians, theologians, or botanists, however, as to which specific plant is the legendary Irish shamrock.

Some believe St. Patrick’s shamrock was one of several species of clover (Trifolium spp.) native to Europe and Britain. Others claim that the true Irish shamrock is in the family Oxalis, perhaps due to a report from a 16th Century Englishman who wrote that the Irish ate “shamrocks,” and plants in the Oxalis family were known to be edible. Adding to the confusion, the Irish word “seamróg” means “little clover.”  

Today, in honor of St. Patrick’s Day, several Oxalis species are sold as shamrocks both here and in Europe, which just annoys those who insist the traditional shamrock is a clover. In 1988, someone conducted a public opinion poll in Ireland asking which plant is the true shamrock, and the results split among several plants, including two varieties of clover and at least one Oxalis, with no real majority view.

In any case, St. Patrick’s Day seems an appropriate time to nominate an American native plant as the New World shamrock. Yellow Wood Sorrel (Oxalis stricta) is sometimes called “sourgrass,” “pickle plant,” or adding to the general confusion, “lemon clover.” As a candidate for St. Patrick’s Day shamrock, Yellow Wood Sorrel certainly looks the part. 

Yellow Wood Sorrel in bloom
Photo: Ansel Oomen, Bugwood.org

Yellow Wood Sorrel is useful, maybe even pretty if you look closely, and it is found absolutely everywhere. Yes, it is a weed! You’ve probably pulled it out of your lawn, your garden, your containers, your driveway or sidewalk — maybe without knowing or caring what it is.

Like many other weeds, Yellow Wood Sorrel grows in a wide variety of habitats – sun or shade, dry or wet, and rich or poor soil. Each of its 3 leaves has a fold down the middle. At dusk, the leaves close up and stay that way until warmed again by the sun.

The little yellow flowers have 5 petals and bloom from spring through late fall. The plant produces lots of seeds in capsules that stand upright above the foliage. When the seeds are ripe, the capsule explodes, throwing seeds up to 3 feet away! 

Oxalis stricta leaves fold up at night like little pleated skirts
Photo: Courtesy of Pixabay.com 

Yellow Wood Sorrel is edible, though in very large quantities it may be mildly toxic. You really should try clipping some tender leaves, or the little yellow flowers, and sprinkling them like micro-greens on top of salads, fish, or chicken. The taste is like lemon, sour and a bit bitter, but refreshing. Tender stems and leaves may be steeped in hot water (a handful of leaves per pint of water) to make a lemonade-type drink high in Vitamin C.

Bees, butterflies, and ants make use of the flowers of Yellow Wood Sorrel, and its long season of bloom means the flowers are available throughout the nectaring season. Perhaps we should be grateful that this weed provides some wildlife benefit by stubbornly popping up in even the most manicured suburban landscapes.

Yellow Wood Sorrel is a small weedy plant that grows everywhere
Photo: T. Webster, USDA, Bugwood.org

So, the next time you find yourself pulling Yellow Wood Sorrel from all the places it doesn’t belong, think of it as shamrock and then save a few leaves for your lunch. Sláinte!

THIS BLOG IS AUTHORED WEEKLY BY CATHY LUDDEN, CONSERVATIONIST AND NATIVE PLANT EDUCATOR; AND BOARD MEMBER, GREENBURGH NATURE CENTER. FOLLOW CATHY ON INSTAGRAM FOR MORE PHOTOS AND GARDENING TIPS @CATHYLUDDEN.