What’s in a Name?
Perennial goldenrod (Solidago spp.), now unfurling its sun-kissed heads in gardens, fields and hedgerows, goes by many names. Florists use the Latin genus name, “solidago” to describe the stems that they include in upscale arrangements. Some people call it a weed, and others condemn it as an allergen. If a weed is a plant that sometimes grows where it is not wanted, goldenrod fits the bill. It is not, however, an allergen. That distinction goes to one of its weedy fellow travelers, the sneeze-worthy ragweed.
A Daisy in Disguise
The solidago genus is home to between 80 and 140 species, native mostly to North America, with a few hailing from South America, Europe and Asia. The plants are characterized by alternate leaves that adorn branching stems. In some species those stems rise from basal rosettes. The golden flowerheads or panicles are composed of hundreds of tiny flowers.
Though goldenrod flowers don’t look like daisies, the solidago genus is part of the large Compositae or daisy family, kin to its frequent fall companions, asters.
In Vogue
As with other American native plants like Joe Pye-weed and Echinacea, goldenrod became a favorite with European gardeners, hybridizers and florists before it came into vogue in the United States. But now, American gardeners have recognized the value of easy-to-grow native plants that attract all kinds of pollinators. At long last, goldenrod, the stalwart denizen of hedgerows, roadside edges, and untended properties, is doing star turns in garden beds and containers. Cultivars and hybrids fit just about every situation, from rock gardens (‘Montana Minnie’ at three inches tall) to the backs of large borders (‘Golden Voices’, topping out at six feet or more).
Species Abound
Nature offers a wide variety of species, though some may be difficult to tell apart and natural interbreeding in the wild sometimes happens. The earliest blooming species include Solidago gigantea, found throughout North America, which, not surprisingly, rises to seven feet and may begin blooming as early as August. The related Solidago canadensis is slightly shorter at about five feet, and is distinguished by the horizontal flower panicles radiating outward at the tops of the stems. Lovely Solidago odora, native to the southern and eastern United States is shorter still, at two to four feet tall, and boasts the added attraction of leaves with an anise or licorice fragrance. Low-growing (one to three feet) Solidago flexicaulis, with zigzagging stems, is a good choice for shadier locations. Other native goldenrods popular with hybridizers include rough goldenrod (Solidago rugosa) and Solidago sphacelata or rough goldenrod.
On the Market
But you don’t have to distinguish among the many native species to find a great, garden-worthy goldenrod at local or online retailers. Popular varieties and species pop up in many places. ‘Golden Fleece’ a variety of rough goldenrod, features horizontal flower panicles and compact stature at 20 inches tall, making it a good choice for containers or beds. The celebrated ‘Fireworks’ is somewhat taller at 40 inches, with especially long golden panicles. For tremendous garden impact, try ‘Endless Stares’, a variety of Solidago mexicana that can soar up to eight feet and features distinctive dark purple stems. And, since gardens do not thrive on flowers alone, there is Hiddigeigei’, a goldenrod with golden green leaves and a top height of about 40 inches.
Get Growing
Goldenrod is an undemanding plant that generally does best in sun or very light shade, and looks spectacular combined with other fall flowers that like the same conditions, like asters or blue ageratum. Moist soil is ideal, but the plants have long subsisted in drought conditions once they are established. To give goldenrods the best start, mix a good soil amendment like Fafard® Premium Natural and Organic Compost with the topsoil when planting new specimens.
One caveat—Goldenrods have stayed around so long because many spread by underground rhizomes, forming sizeable clumps. They may self seed as well, which leads to plants that sometimes turn up in unlikely places. This is fine in informal planting schemes where, admittedly, goldenrod looks best, but may be less desirable in other garden areas. Fortunately the wandering seedlings can be grubbed out with a little effort.
Bees, butterflies and other pollinators will celebrate goldenrod’s homecoming in American gardens and flock to the radiant flower stalks. That is reason enough to grow and love it.