Coryphantha cactus (Coryphantha pycnacantha)
pycnacantha
About this plant
Coryphantha pycnacantha is a small, round cactus known for its dense clusters of spines and occasional yellow flowers. It is a slow-growing plant that stores water in its thick stem, making it very drought-resistant. This cactus is often grown as an ornamental plant in rock gardens or as a potted succulent.
Taxonomy
Higher classification: Order Caryophyllales
Origin & Distribution
- Native region
- Mexico
- Distribution
- Native to parts of Mexico, especially in dry, rocky areas.
Care
- Suitable locations
- Indoor, Outdoor, Balcony, Greenhouse
- Preferred window facing
- South-facing, West-facing, East-facing
- USDA hardiness zones
- 9-11
- Soil pH
- 6.0-7.5 (neutral to slightly acidic)
- Soil type
- well-draining cactus or succulent mix
Watering. Water sparingly, allowing the soil to dry completely between waterings. Reduce watering in winter when the plant is dormant.
Fertilizing. Feed with a balanced, diluted cactus fertilizer during the growing season (spring and summer) about once a month. Avoid fertilizing in winter when the plant is dormant.
Coryphantha pycnacantha is a drought-tolerant cactus that prefers bright sunlight and well-draining soil. It needs infrequent watering, especially in cooler months, and is generally easy to care for if kept dry and sunny. Overwatering can cause root rot, so watering should be done sparingly.
Propagation
- Propagation methods
- Seeds, Cuttings
Ornamental features
- Flowering
- Yes
- Flowering period
- spring
Dense spines covering the round stem and bright yellow flowers in spring.
Toxicity & Safety
Non-toxic to humans and pets, but spines can cause injury if touched.
Allergy information
Coryphantha pycnacantha is a cactus and generally does not cause allergies. However, some people might be sensitive to its spines if touched, which can cause skin irritation. To avoid problems, handle the plant carefully and wear gloves when needed.
Common problems
Common problems include root rot from overwatering and sunburn if suddenly moved from shade to intense sun. Pests are rare but can include mealybugs or spider mites.
Uses
Primarily grown as an ornamental plant for its unique appearance and flowers. Suitable for rock gardens and succulent collections.
Notes
When repotting, be careful of the spines. Use gloves or tools to avoid injury. The plant prefers to be slightly root-bound and does not need frequent repotting.