Obtained the seed in the 2022 Nov. DnD seed swap. It's hard to find Helenium varieties to grow. I will reach out to the man featured in the 2022 Gardener's World who maintains the national collection of Helenium there to see if he sells seed.
From the Missouri Botanical Gardens: Uses in borders. Also effective in prairies, meadows, cottage gardens, rock gardens, wild gardens or disturbed areas. Impressive when massed. Common name of bitterweed is in reference to this plant containing a toxic substance which causes milk to taste bitter when cows graze on the foliage.
Common name of sneezeweed is reportedly in reference to a former snuff-like use of the dried and powdered flowers of this plant by members of some native American Indian tribes for treatment of blocked sinuses.
NOTE that the plant is poisonous to most mammals, and if eaten by cows will cause their milk to become bitter and unusable. Helenium amarum is classed as an invasive weed in the USA, where it has spread widely in its native range and now covers a substantial portion of the grazing land in Texas. Source:
https://www.cabi.org/isc/datas...
