I grow mine out in the garden and they do fine, especially in a neglected part of it. Maybe that's why they've survived for decades - they never get dug out. Thimble Farms in British Columbia Canada offers 9 kinds, generally $4 or $5 each. They ship to the U.S. http://www.thimblefarms.com/perennials%20h-z.html Diane Whitehead Victoria, B.C., Canada cool mediterranean climate mild dry summers, mild rainy winters