Summary
As the scientific name suggests, Solidago gigantea is indeed a large goldenrod species, although it was not the tallest in the trial. Smooth goldenrod is often maligned by those who associate it with large vigorous goldenrods such as Solidago altissima (tall goldenrod) and Solidago canadensis (Canada goldenrod); however, S. gigantea has a less aggressive habit and is worthy of consideration for garden use where space and conditions allow. The common name smooth goldenrod refers to the waxy hairless stems of this species which can vary in color, but some of the more ornamental specimens display purple to almost black stems. The tips of growing stems nod in a shepherd’s crook shape before straightening to produce elegant one-sided inflorescences in late July and August, making this one of the earliest of the mid-Atlantic goldenrods to flower. The bloom time of S. gigantea is perfectly aligned with that of New York ironweed (Vernonia noveboracensis), and both share a predilection for wet habitats. Smooth goldenrod can be grown in drier soils, although plants will be shorter and have increased susceptibility to powdery mildew.
Details
- Rating
4.0 (Top Performer) - Common Name
smooth goldenrod