Landscaping With Native Plants, Northeast U.S.: Perennial Sun Gardens

The first four perennials native to the Northeastern United States featured are all good plants to grow in wet areas of your landscaping. Two of them, in particular, are typically found growing near water in the wild: namely, Northern blue flag and marsh marigold. Another that is commonly found growing in moist conditions is the horsetail plant.

Irises are one of the most exquisite perennials in the plant world. If you agree, then you may be intrigued by the prospect of growing a native iris in your landscaping. Northern blue flag (Iris versicolor) furnishes you with an opportunity to do just that if you are a resident of such areas as New England, Kentucky, Minnesota, Ontario, and Newfoundland.

Names can be deceiving, and plant names are no exception. Some of the native plants on this list have names that make them sound like they come from the seedy part of town. Does Joe-Pye weed deserve to be classified as a weed? Or is this stately plant with fluffy mauve flower clusters deserving of a spot in perennial sun gardens? Only you can decide. But if you're the type influenced by what the avant-garde have to say, take note that many designers hold Joe-Pye weed (Eupatorium maculatum) in high regard.

The common name "marsh marigold" for Caltha palustris is both revealing and deceiving. The "marsh" part of the name accurately reveals its tolerance for soggy soil, which is a trait that makes it a logical choice for a ground cover to use around a water feature for spring color. It is not, however, a true marigold.

Bee balm cultivars have become so popular in landscaping that many people who live in regions where bee balm is a native perennial might not readily recognize it as such. However, residents of Oswego, New York, should know the difference. Due to the fact that the Oswego Indians concocted a medicinal tea using the leaves of bee balm (Monarda didyma), a nickname for this plant is "Oswego tea."

Black-eyed Susans (Rudbeckia hirta) are tough and make good full-sun plants. They tolerate considerable neglect, although you surely can improve their appearance in your perennial sun garden by supplying a modicum of TLC. As is often the case with tough plants, black-eyed Susans, under some conditions, can be even more carefree than you want them to be. In fact, some gardeners have called them "thuggish."

Wild violets (Viola sororia) don't have "weed" in their common name, but they might as well—in the opinion, at least, of many homeowners who lump them together with other common lawn weeds and wage war upon them. But, what's not to like about a flowering ground cover with a pretty bloom and that requires no maintenance?

Columbine (Aquilegia) comes in many colors, and this one shown is a yellow cultivated type. But the native type that qualifies columbine for inclusion in this article is red (A. canadensis); you can often see it growing on rocky cliffs in New England. Columbine is one of those "swing" plants (at least at the northern end of its range): you can use it in perennial sun gardens, but, if you're willing to tolerate reduced flowering, it will also work in areas with partial shade.

Azure bluets (Houstonia caerulea) are the "whatchamacallit" of the plant world in eastern North America. The range of this omnipresent native perennial stretches from the northern reaches of Quebec to the southern tip of the toe of Louisiana. This tiny ground cover spills across roadsides far and wide in great drifts, although people are only aware of it in the springtime when it's flowering. Its ubiquitousness notwithstanding, hardly anybody knows what it's called. Just by reading this article, you know something that 99-plus percent of people do not know!

While some people find a sort of odd beauty in the flowers of common milkweed (Asclepias syriaca), most gardeners grow it with butterflies in mind. Specifically, common milkweed plays host to the wormy young of the prized monarch butterfly. If you're not riddled with entomophobia, you might even enjoy watching the caterpillars, themselves eating the milkweed vegetation.

Asclepias tuberosa is also a kind of milkweed, albeit one not quite as well known to the general public as the prior entry. Gardeners, however, are well acquainted with this native perennial: its lively orange flowers have made it more successful commercially than its more demure cousin.

Yarrow (Achillea millefolium) is native both to North America and to Europe. This fact has given rise to questions as to the provenance of some yarrow communities in the former. According to Doug Ladd, "Some scientists think that most North Woods populations are introduced European weeds, while others believe most local Yarrow plants are native to the region" ( p.161). Those of you who aren't sticklers for such details will be more interested to know that this common wildflower is easy to grow: it's not easily deterred by poor soil and is considered a drought-tolerant perennial.

Although black-eyed Susans are rugged, the Culver's root is every bit as upper-echelon in the category of tough plants. It is also one of four native perennials covered in this article that is tall enough to make an impact in the background even when smaller plants or other objects occupy the foreground, the other three being Joe-Pye weed, common milkweed, and goldenrod.

The last three native perennials on this list come into their own in late summer or early fall (depending on the specific type grown, where you live, and the growing conditions present).

Purple love grass (Eragrostis spectabilis) is the odd-ball on this list. For one thing, it's grass. Secondly, many people (even plant lovers) don't pay much mind to it. Don't ignore the masses of small, red flowers it produces. When it is present in sufficient numbers, it gives the appearance of a reddish haze hovering over the ground. When it's done flowering, the stalk breaks off curiously, making it resemble a "native tumbleweed." Since it grows wild along roadsides, it must be highly tolerant of poor soil, road salt, and other pollutants (which suggests a potential use for it in the landscape).

Not everyone will love purple love grass. Most of you will relegate it to weed status. But there are worse ground covers that try to grow along the roadside on a large, rural property, where whatever you grow will be battered by road salt and other pollutants, and where growing conventional ground covers might be cost-prohibitive.

Many North Americans despise goldenrod, a native perennial that grows in thick stands, forming a monoculture. Giving the naysayers the benefit of the doubt, their disdain might be because goldenrod is so common. Don't people often take for granted the things closest to them?

But viewed objectively, goldenrod is a magnificent wildflower. Pretend you had never laid eyes on it before, before observing it in the photo. How could you not admire those large plumes of flowers in that bright golden color? Admit it: if goldenrod were native, instead, to some distant land, and you saw it for sale in a garden catalog, you'd probably be itching to buy it.

If you do not live in North America and are considering growing goldenrod, be aware that, while it can naturalize readily, this vigorous spreader may naturalize so easily as to become an invasive plant.

Despite its common name, this treat for late summer and early fall is native to most of North America, not just the New England states. Although people commonly call this and similar plants "asters," they are also part of the overall aster family. This family of flowers is the North's largest. Among the plants mentioned above, alone, the following are all members of the aster family:

• Joe-Pye weed
• Black-eyed Susan
• Yarrow
• Goldenrod

Like the Northern blue flag and marsh marigold, the purple pitcher plant likes water. If you ever encounter it in the wild (many never do—you have to be willing to get off the beaten path to find it), it will likely be in a swampy area. Watching the development of its flower annually is priceless.

Pokeweed is attractive, but the purple berries (its best feature, aesthetically) are quite poisonous (so beware if young kids will be playing in the yard). This is an herbaceous perennial that can get quite tall (8 feet) under the right conditions (namely, partial sun, ample water, and a fertile loam). A large pokeweed plant covered with racemes of berries in fall is an impressive sight.