Our favorite sources

Mountain Valley Growers. An excellent site for organic seedlings, including 17 varieties of mint. mountainvalleygrowers.com

Kitazawa Seed Company. This company based in Oakland, California, specializes in Asian herbs and vegetable seeds, including five varie­ties of shiso. kitazawaseed.com

Baker Creek Heirloom Seed Company. This source has earned a dedicated cult following for its more than 1,400 unusual seeds. rareseeds.com

Companion Plants. Sells seeds and plants of unusual herbs, including hoja santa. companionplants.com