Old man cactus (Cephalocereus nudus)
Care, watering, light and tips for Old man cactus on Floravia.
Quick facts
- Family: Cactaceae
- Difficulty: Easy to care for
- Watering: every 21 days
- Light: Full sun
- Temperature: 10–40 °C
About Old man cactus
Cephalocereus nudus, commonly known as Scaly-flowered Tetecho, is an impressive, slow-growing columnar cactus that can reach considerable heights, often branching from the base. Its stem is covered with short, dense spines, giving it a robust and almost hairy appearance at the top, where it produces its flowers. It's an excellent choice for desert gardens, xeriscaping, or as a striking centerpiece in large pots on sunny patios.
Native range
Mexico
Care tips
This cactus thrives in full sun, requiring at least 6 hours of direct sunlight daily for optimal growth. Watering should be sparse, allowing the substrate to dry out completely between waterings; in winter, reduce it drastically. Use a very well-draining substrate, specifically for cacti and succulents, to prevent waterlogging, which is the most common and fatal mistake for this species.
How to save a dying Old man cactus
- Warning signs
- Soft/black base (rot), wrinkled/dry stem (extreme dehydration), brown/black spots (fungi/pests).
- First aid
- If rot, cut to healthy tissue. If dry, water moderately. Isolate if pests.
- What kills it
- Overwatering (roots sensitive to moisture) and lack of light (weakens and etiolates).
- Can it be saved?
- Yes, if rot hasn't reached the apex or if the stem still has viable tissue and isn't completely dehydrated.