There are plenty of Goldenrods in North America; 31 species only in Ontario. Goldenrod species are highly variable and difficult to identify. Although often associated with invasiveness and called weeds, this is not always the case and some species are quite rare or even threatened.
I think there is space for a small goldenrod in any garden, and this one is a relatively small size, about 25-30 cm high, with deep yellow flowers at the beginning of the summer. All goldenrods are important food sources for quite a few species of pollinators.
It would be a good addition for the rock and scree gardens, or a dry meadow. It is drought resistant and actually looks best when kept on the ‘lean’ side.
Germination: easy, done it myself – sown in the fall or in the spring after cold-moist stratification.