Old man cactus (Cephalocereus senilis)
Care, watering, light and tips for Old man cactus on Floravia.
Quick facts
- Family: Cactaceae
- Difficulty: Easy to care for
- Watering: every 20 days
- Light: Full sun
- Temperature: 10–40 °C
About Old man cactus
Cephalocereus senilis, commonly known as the 'Old Man Cactus', is a columnar cactus native to Mexico, famous for its long, silky white hairs that give it an aged appearance. These hairs are not only decorative but also protect the plant from intense sun. It's an excellent addition to cactus collections, desert gardens, or as an indoor plant in large pots, adding an exotic and distinctive touch.
Native range
Central Mexico
Care tips
This cactus thrives in abundant direct sunlight, ideally 6 to 8 hours a day; lack of light can cause its hairs to become less dense. It requires very moderate watering; allow the substrate to dry out completely between waterings, especially in winter. Use a well-draining substrate specific for cacti and succulents. A common mistake is overwatering, which can lead to root rot, so it's crucial to ensure good drainage and avoid excessive watering.
How to save a dying Old man cactus
- Warning signs
- Soft, dark base (rot), wrinkled, flaccid stem (underwatering/damaged roots), yellowing wool or pests.
- First aid
- For rot, cut affected part with sterile knife until healthy tissue. Let it callous, then repot in dry substrate. For dehydration, check roots and water moderately.
- What kills it
- Overwatering is the number one killer; this plant hates soggy soil. Also lack of light or improper substrate.
- Can it be saved?
- Yes, if rot hasn't reached the upper stem or if dehydration isn't extreme. Act quickly.