Live Equisetum Horsetail Plants - Bamboo - Zen Koi Pond Evergreen Plant 10-15 horsetail stalks from a one gal pot approx. 1-2 ft. tall Beautiful bamboo like plant for your koi pond or zen garden. Cold hardy and evergreen! Max. Height: 6 feet tall Max. Diameter: .5 inches wide Min. Temp: -20 F (Hardy in USDA Zones 6 to 10) Light: (shade-sun 1-5): 3-5 Cannot ship to California or Hawaii