Eve's Pin Cactus Plant Description Opuntia subulata Eve's Pin Cactus, which is a member of the family Cactaceae, is also known by its alternate scientific name, which is Austrocylindropuntia subulata. Eve’s Pin can reach a height of 12’ feet and a width of 5’ feet. This unusual and attractive cactus grows in a tree-like formation. Its stems are deep green, un-segmented, and cylindrical. Eve's Pin Cactus Plant Specs & Regions Native to: S. America Zone: 9 Hardiness: tender soft succulent - will not tolerate frost Recommended light conditions: full sun to partial shade Bloomtime: Spring through Summer Bloom Color: red Eve's Pin Cactus Water & Light Recommendations Watering Needs Indoors: Instead of giving your succulents gradual sips of water throughout the week, give them a good soaking, to the point where water runs out the drainage holes at the bottom of the pot. Be sure to empty the water that runs into the saucer, succulents do not like to sit in water. Then let the soil dry out completely before watering again. Watering Needs Outdoors: In the Summer water your succulents every two weeks, by soaking them and letting them dry before watering again. In the Winter water your succulents once a month. Technical Information About This Plant Requires bright light for most of the day. Or constant dappled shade. Best to water every 2 weeks.