Live Equisetum Horsetail - Bamboo - Zen Koi Pond Water Garden Evergreen Plant 3-4 horsetail rooted strands, 1-2 feet long (Will fill in and be a full pot in a year) Min. Temp: -20 F (Hardy in USDA Zones 6 to 10) Light: (shade-sun 1-5): 3-5 Cold hardy and evergreen! Beautiful bamboo like plant for your koi pond or zen garden. Ships from Texas!