Old Man Cactus is a tall columnar cactus from central Mexico, covered in long white hairs that give it a shaggy look. It is grown mainly for that woolly appearance, and it needs very sharp drainage and plenty of bright sun.
Family
Cactaceae (Cactus family)
Grows as
Succulent
Light
Full sun
Water
Water thoroughly only when the soil is fully dry, and water sparingly in winter.
Soil
Very well-drained cactus mix, more free-draining than standard potting soil.
Temperature
18–30 °C; protect below 10 °C
How easy
Easy
Safety
Not toxic to cats or dogs (ASPCA).
Native range
NE. Mexico (to Veracruz)
Climate
desert or dry shrubland
About
Cephalocereus senilis, the old man cactus, is a species of cactus native to Hidalgo and Veracruz in central Mexico. It is threatened in the wild, but widespread propagation and popularity in cultivation have reduced the demand on wild populations.
How to grow it
Cephalocereus senilis is a very popular cactus in cultivation, grown for its woolly appearance. It prefers a very well-drained soil mix (more so than many other cacti), and much bright sunlight, which encourages growth of the hair.
Text excerpted from the Wikipedia article Cephalocereus senilis by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.