How to Water Peruvian old man cactus?
Moderate regular watering, allowing brief slight drying between soakings

Peruvian old man cactus · Espostoa lanata
Also known as: cotton ball
Grow in cactus compost in a sunny position. Water moderately during the growing season and keep almost dry in winter. See houseplant cacti and succulent cultivation for further information
Moderate regular watering, allowing brief slight drying between soakings