The Plants That Made America

As we mark the 250th Anniversary of America’s Declaration of Independence, let’s reconsider the American landscape. Is it still truly American?

Look around any suburban neighborhood. Do you see manicured lawns extending right up to the house? That’s the style favored by the same British aristocracy Americans rejected in 1776!

18th Century British landowners displayed their wealth and power with big lawns maintained by workers from the lower classes using hand scythes to cut the grass.

And do you see yards in your neighborhood with tightly-clipped evergreen shrubs arranged in rows? That’s the style favored by French nobility before the French Revolution!

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, more natural landscapes and the vast bounty of beautiful and useful plants native to this continent. These plants tell our American story! (Click on highlighted text below for more information.)

From the beginning, the awesome beauty of America’s trees captivated English explorers along the Atlantic coast. In 1584, explorers were so awed by the incredible beauty and fragrance of Roanoke Island’s Eastern Red-cedars (Juniperis virginiana) that they decided to make Roanoke the very first colonial settlement in America.

Farther north, in 1605, English explorers were stunned by the sight of forests crowding right to the shoreline including vast numbers of incredibly straight, tall White Pines (Pinus strobus). The British Royal Navy desperately needed a new source of specialized lumber for ships’ masts, so the White Pine became a motivating reason for colonizing America. But as colonists settled in New England, they also found the White Pine useful for building everything they needed to live. To prevent the growing American population from harvesting trees needed by the Royal Navy, the English Crown claimed all American White Pines over 24 inches in diameter to be property of the King, and imposed penalties for cutting them! The Crown’s over-reach triggered the Pine Tree Riot in 1771, the first violent protest by American colonists against the British, which likely served as inspiration for the Boston Tea Party.

Forest of Eastern White Pine

As tensions grew with England, Americans found other ways to protest using American plants. The hated Tea Act caused colonists to start using the leaves of a native shrub, Ceanothus americanus, or “New Jersey Tea,” instead of English imports. And in another practical act of rebellion, colonists started making their own ink and cloth dyes from “Pokeweed” (Phytolacca americana), a common American plant, thereby avoiding British taxes on imported goods.

Colonists learned from indigenous people to plant the “three sisters,” corn, beans, and squash, for a nutritious diet based on American plants. And the earliest American cookbooks included recipes for pumpkin pie and cranberry sauce, both from American native plants and echoing the first Thanksgiving.

Many of our best native landscape plants today were critical to the life and survival of early American settlers. They used Witch-hazel (click here and here for more), 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 repellants, 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 travelling ministers who performed wedding and funeralservices 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”

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”

After the Revolution, as our new country was still being explored, Thomas Jefferson sent Lewis & Clark on a daring mission of exploration to the Pacific Ocean. Part of their mission, expressly ordered by Jefferson, was to collect and document American plant species. Captain Meriwether Lewis collected specimens, and made drawings and paintings of over 200 plants he described as “common to this country,” but most unknown to science at the time.

From the first Thanksgiving through the era of Westward Expansion, 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 our 250th Anniversary by pledging to plant more great American plants. Many have been featured in this blog over the past several years. There are so many American trees, shrubs, and perennials that would make great additions to your yard!

Maybe to celebrate this special July 4, the Goldenrod called ‘Fireworks would be appropriate?

Solidago rugosa ‘Fireworks’

How to Do Fall Garden Clean-up

I prefer to do my fall garden clean-up with a good book and a glass of wine. But it works just as well with a nice cup of tea, followed by a nap.

The point is, the less garden work you do at this time of year, the better!

Sure, you can blow or rake fallen leaves off of driveways and patios, and move leaves from lawns to flower beds, shrub borders, and under trees. If you’re a real over-achiever, you can do a final weeding job, and maybe spread some compost around woodland plants. Then wrap up the fall chores by spreading fallen leaves over the soil to keep everything warm and snug over the winter. But you don’t really have to.

Fallen leaves are good for the garden, and a few leaves on the lawn are harmless

There are very good reasons to simply let leaves stay where they fall. And intentionally spreading fallen leaves, especially on plants along streets and driveways where salt application is expected, or where dogs visit to leave pee-mails for friends, adds some valuable protection for plant roots and stems. Fallen leaves are better than any sort of commercial mulch for that purpose because they are free, untainted by chemicals, and they add nutrients to soil and plants. In addition, those fallen leaves are likely hosting beneficial (and adorable) insects like butterflies that you’ll want to have around in the spring, and they protect valuable (and even more adorable) insects like fireflies and ground-nesting native bees.

Mourning Cloak butterflies spend the winter in fallen leaves and emerge in early spring

Bagging leaves is so much work, and so unnecessary. But it does make it easier for those of us who need more of them to cart them away! We routinely swipe bagged leaves from around the neighborhood to mulch around plants in common areas, like traffic islands, for winter protection.

A bag of leaves “borrowed” from a neighbor and put to good use

If you have way too many leaves for your own garden, consider using the excess to expand into parts of your lawn for new beds for shrubs and perennials in the spring. Simply define a section of lawn for a new planting area and pile the excess leaves 3 to 6 inches deep. Put up a simple temporary fence, if you like, to contain the leaves over the winter, and let them sit there until spring. A deep layer of undisturbed leaves will eventually kill the lawn, enabling you to plant directly into the soil the following season. If you still have too many leaves, adding them to a compost pile or bin is a great way to turn them into excellent, and free, fertilizer.

Another chore to skip in the fall is cutting plants back. Native grasses and perennials, in particular, are loaded with nutritious seeds that birds can forage all winter long. Cutting these valuable sources to the ground, while buying commercial seed mixes for birdfeeders, is counter-productive. I have been endlessly entertained watching song sparrows and dark-eyed juncos repeatedly jumping up from the ground to grab seeds from the tops of Switch Grass and Prairie Dropseed. And goldfinches adore the seeds of Coneflowers and Black-eyed Susan. Masses of tall perennials and ornamental grasses left standing also provide essential cover for songbirds hiding from predators and stormy weather.

Perennials left standing can provide food for birds all winter
Goldfinches feed on Echinacea.

For many years, suburban gardeners considered “neat and tidy” to be the proper garden aesthetic, but that view is rapidly changing. Modern landscape designers very intentionally include grasses and perennials specifically for “winter interest.” The movement of these plants in the wind, and their muted winter colors and interesting shapes, make their inclusion in contemporary designs essential. Cutting them to the ground destroys that beauty, resulting in a barren landscape all winter. Wait until spring — the best time to cut back grasses and perennials is early spring, just before new growth begins.

Switch grass (Panicum virgatum) catches the afternoon sun

So, garden friends, take it easy! Leave the leaves. Don’t put down shredded bark or wood chip mulch. Let plants go to seed. Stop dead-heading and tidying up. Let Nature do its own thing for the plants, insects, and birds we want to have around in the spring.

Let it go – it’s beautiful!

And it’s a lovely day to take a nap!

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!

Soggy Solutions

Do you have a soggy situation in your yard: a low spot where water always puddles for a few days before drying up? If so, lucky you! You’ve got the perfect spot for some beautiful water-loving shrubs!

Rainstorms are becoming more frequent and more intense. Suburban lawns often have mushy patches that don’t really recover, even after the ground dries. Turf grass roots sitting in standing water are deprived of oxygen and soon die. You could spend hours – and dollars — aerating, re-seeding, or laying new sod only to see the same thing happen again in the next downpour.

Lawn grass can’t live in water-logged soil

Or, you could plant a few native shrubs that would be happy to soak up that water! Some of our most desirable native plants evolved near ponds, streams, and in wet meadows. They can live in standing water for days at a time, and take up excess water that otherwise becomes mosquito-breeding habitat. Even better, because they are native to our region, they are winter-hardy and provide food for pollinators and birds.

It’s not hard to remedy a soggy area of lawn. You can plant right into the wet areas, even without removing any surviving lawn first. With the right plants, not much soil amendment is necessary, either. Dig a hole about the same depth and twice the circumference of the root ball of the shrub. Loosen the root ball if it is very tightly bound. Adding a few shovel fulls of compost and mixing it with the soil in the planting hole can help. But don’t plant too deep. Keep the crown of the plant just above the soil line. And give your new plant some company! More plants take up more water, reduce compaction, and improve soil drainage, which improves survival odds for all of the plants.

Assuming the spot is mostly sunny, and usually dries out a few days after a rainstorm, any of these great shrubs will work beautifully:

Buttonbush (Cephalanthus occidentalis)
Buttonbush produces really interesting flowers from early to mid-summer that last for weeks. The flowers look like 1½-inch white spheres and attract hummingbirds and butterflies. The leaves are large, glossy green, and make a gorgeous background for the flowers. After the flowers fade, hard spherical nuts resembling buttons develop and often last through the winter until birds harvest them.

Buttonbush flowers
Photo: Lady Bird Johnson Wildflower Center

Native to swamps and streamsides from Canada to Florida and west to the Mississippi River, Buttonbush is hardy in Zones 4 to 10. In the Northeast, the shrub can reach 6 to 12 feet tall and 4 to 8 feet wide. In colder zones, the shrub may die back to the ground in winter and grow back to 3 to 4 feet in summer. Pruning is not necessary, but if you want to keep it a bit smaller, it won’t mind being pruned in early spring since the flowers form on new growth.

Buttonbush becomes a large rounded shrub in suburban landscapes
Photo: American Beauties Native Plants

Buttonbush loves wet soil, including areas that are often flooded with shallow standing water. It is generally deer-resistant once established, but young plants should be protected in the first few years. The shrub is happy in full sun or part shade.

Possumhaw viburnum (Viburnum nudum)
Also called Smooth Witherod, this shrub is one of our most attractive native plants for suburban landscapes. It will tolerate wet, boggy soil, though it does perfectly well in average soil as well, and is a great foundation plant. Native to woodlands, swamps, and thickets from Newfoundland to Florida, it grows 6 to 12 feet tall and 4 to 15 feet wide. It has shiny green leaves, big lacy white flowers in spring, and berries that turn colors from pink to blue to black. It also has spectacular fall leaf color. Possumhaw doesn’t need pruning and is not particularly attractive to deer. This plant works in almost any yard, but it is an ideal solution for a wet area.

Viburnum nudum as a foundation plant at the Nature Center
Possumhaw berries change colors as
they ripen
Vibrant fall color and berries

Winterberry (Ilex verticillata)
It’s hard to imagine a more useful landscape plant than Winterberry. It can live in standing water, but is also fine in average landscape conditions. It produces brilliant red berries in the fall that feed migrating birds.

This popular shrub is great in wet soil
Robins, mockingbirds, blue jays, cardinals, and cedar
waxwings flock to Winterberries

Pussy Willow (Salix discolor).
Willows are wetland plants, and our native Pussy Willow is the most beloved of the bunch. As a multi-trunked shrub or small tree, 6 to 15 feet tall, Pussy Willow makes a great focal point where water collects. Plant it, then add two or three of the shrubs described above, and a formerly soggy mess will become your favorite part of the yard! For more information on this great little tree, read our earlier blog post here.

Pussy Willow (Salix discolor) is an easy-to-love small tree
Fuzzy catkins show up in early spring and feed emerging pollinators

So, as you start dreaming about spring flowers, don’t forget about spring “showers,” which are more likely to be torrential downpours these days. Plan ahead for standing water and add some of these water-loving plants to your spring shopping list!

THIS BLOG IS WRITTEN 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.

Mighty Arborvitae

Arborvitae gets no respect.

Though Arborvitae (Thuja occidentalis) may be the most-planted tree in suburban America, it has been given a diminished role unworthy of this majestic native tree. Planted by the thousands along property lines by developers, builders, and landscapers, rows of crowded Arborvitae trees, standing shoulder to shoulder, have become the de-facto fences of suburbia.

A typical builder installation of Arborvitae
Arborvitae “fence” on a property line

Without room to spread their branches or reach their natural height, Arborvitae is often topped and heavily pruned to form hedges. They handle this assignment very well, but Arborvitae can do so much more!

If you’ve only seen Arborvitae used as a hedge, it may surprise you to learn that in its natural habitat, it can grow 50 to 60 feet tall and live for hundreds of years! In fact, the largest known specimen is over 100 feet tall and more than 40 feet wide at the crown. The oldest living Arborvitae is thought to have germinated from seed in 952 A.D., and is now 1,071 years old! Based on ring counts on dead trees, there are verified specimens of Arborvitae that lived to be over 1,800 years old.

An ancient stand of Arborvitae on cliffs overlooking
Northern Lake Michigan
Photo: C.J. Earle

Arborvitae is one of the common names for Thuja occidentalis and means “tree of life” in Latin. It was named by the French sea captain, Jacques Cartier, when he was exploring Canada in 1536. After months at sea, Cartier’s crew, including two young members of the Huron native tribe who had been sailing with them, were all suffering from scurvy. On the way up the St. Lawrence River, Cartier dropped the two young men at their home village. When he later returned, he was astonished to find the two Hurons fully recovered from all symptoms of scurvy while his French sailors were still suffering. He asked the Huron elders to teach him the cure, and they showed him how to make a medicine, a tea rich in Vitamin C, from the foliage of Thuja occidentalis. Cartier brought the life-saving plant back to France, making it the first North American tree introduced to Europe.

The native habitat of Thuja occidentalis is swamps, low woods, and forest edges from northern Canada south to New York and Connecticut and west to Michigan and Northern Indiana. It is an evergreen conifer, extremely cold hardy, and adapted to poor rocky soils all the way to the edge of the Canadian tundra. Sometimes called Northern White Cedar, Eastern White Cedar, or Swamp Cedar, Arborvitae is not a true cedar in the Cedrus family, none of which are native to North America. But the fragrance of its foliage and bark, and the usefulness of its wood, are similar.

Arborvitae often grows in very thin, poor soil in northern
North America and is adapted to extreme cold. This forest of
Arborvitae is at the brink of the Niagara Escarpment in Northern Wisconsin.
Photo: C.J. Earle

The foliage of Arborvitae is flat and scale-like and has a spicy fragrance when crushed. Native peoples used it not only for medicine but also used the fragrant foliage as insect-repellant bedding. They stripped the tree’s shredding bark to make rope and twine, and they found many uses for the rot-resistant wood, including canoe frames and roofing shingles.

Thuja occidentalis has significant value to wildlife. It is a favorite food of white-tailed deer, as suburban homeowners often discover to their dismay. Twigs and foliage of Arborvitae constitute as much as 10 to 25% of the winter diet of deer, who will browse it as high as they can reach. In northern forests, the tree also provides highly nutritious food for snowshoe hares, porcupines, red squirrels, and beavers. Many native birds find nesting sites in Arborvitae and insects to feed their young. The seeds are the preferred source of food for Pine Siskins, birds indigenous to the Northeastern US.

It is sadly ironic that one of the most-planted trees in suburbia is disappearing in the wild. Thuja occidentalis is listed as Threatened in Connecticut, Illinois, Kentucky, and Maryland and Endangered in Indiana, Massachusetts, and New Jersey. Development is the primary culprit as forests are cleared to make way for more suburban homes.

It is equally sad that the rows and rows of Arborvitae planted on suburban property lines are not nearly as valuable to wildlife as they should be. The most popular varieties of Arborvitae are cultivars or hybrids that offer little value to wildlife – other than deer. A cultivar called ‘Emerald Green’ Arborvitae was developed in the 1950s in Denmark, just in time for the rapid expansion of the US suburbs after WWII. It quickly became the ubiquitous hedge plant we see all around us. In a tight hedge, and with limited biological diversity due to clonal reproduction by nurseries, its value to insects and birds is limited.

Not Native

Another Arborvitae popular with builders is a hybrid called ‘Green Giant,’ which is a cross between a species indigenous to the Pacific Northwest and a Japanese species. As a hybrid between two non-natives, ‘Green Giant’ has very little value to insects or birds in this part of the country. If you can find the straight species of Thuja occidentalis (without a cultivar name), plant that. If not, ‘Emerald Green’ is a better choice than ‘Green Giant.’

Thuja occidentalis is an amazing tree. It deserves to be more than a fence! Given enough room to take its natural form, Arborvitae merits a starring role in suburban landscapes.

Growing the way nature intended, Arborvitae takes its
rightful place with Oaks, White Pines, and Junipers in
Northeastern landscapes

In our last blog post [Privacy Without “O-fence“], we urged homeowners to diversify their hedges and privacy screens by planting a mix of native trees and shrubs to increase habitat and biodiversity. Too much of any one plant becomes a mono-culture, limiting resources for wildlife. Unfortunately, that is what has happened to this magnificent native tree.

Don’t limit Arborvitae to this poor fate

Think of Arborvitae as an easy-care, long-lived, medium-sized, native, hardy evergreen that will enhance your landscape as part of a diverse planting of trees, shrubs, and perennials. You won’t be sorry!

Mighty Arborvitae

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.