Old Man Cactus Description Cephalocereus Senilis grows white, wool-like fuzz from top to bottom. They grow vertical and can become quite tall. Pups will off-set at the base of the mother plant. A beautiful cactus to add dimension or to use as a focal point in your drought tolerant garden. Will also look beautiful in a classic terracotta pot. Beware, this cactus has long brown spines that poke through its white wool. Old Man Cactus Specs and Regions Native to: Andes of Peru, Bolivia, Argentina Zone: 9-11 Recommended light conditions: full sun Hardiness: tender soft succulent - will not tolerate frost Bloomtime: Spring Bloom Color: whitish pink Old Man Cactus Water and 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.