Silphium Species, Starry Rosinweed
Silphiumasteriscus
Synonym
Silphium
gatesii
Silphium
laevigatum
Silphium
scaberrimum
I grew this plant easily from some seed given to me. I do not know how old the seed was. I sowed it in spring indoors and by August I had...Read More
One day the plant was beautiful and full of blooms and about 4' tall. The next day it was dying. Anyone know what could cause this? I ...Read More