Light
Direct Sun
Requires at least 6 hours of direct sunlight daily; ideal for south- or west-facing windows.
Reference image Coryphantha sulcata
Pineapple Cactus
Overview
Coryphantha sulcata is a low-growing, clumping succulent perennial cactus famous for its attractive yellow flowers with reddish centers 1. It is commonly known as the pineapple cactus or furrowed nipple cactus due to its unique tubercular structure.
Taxonomy and Naming
This species was originally described in 1845 by the renowned botanist George Engelmann. The genus name Coryphantha derives from the Greek words for 'top' and 'flower', referring to the apical blooms, while the specific epithet sulcata means 'furrowed' or 'grooved' in Latin, pointing to the distinctive groove on the upper side of the tubercles 2.
Natural Distribution and Habitat
Its native range extends from South-Central United States, primarily in Texas, down into northeastern Mexico 1. It thrives in gravelly, limestone soils, rocky hillsides, dry shrublands, and desert grasslands, often growing under the shelter of nurse plants.
Appearance
The stems are globose to short-cylindrical, eventually offsetting to form dense mounds. The tubercles are prominent, bearing a deep longitudinal groove on their upper surface. Radial spines are needle-like, yellowish-brown, and spread outwards. Large, showy yellow flowers appear from the plant's apex during late spring and summer.
Care in Cultivation
In cultivation, it requires full sun to maintain its compact shape and promote healthy spination and flowering. The soil must be highly porous and mineral-based. Water thoroughly during the hot summer months only after the soil has completely dried out, and keep completely dry in winter.
Common Care Mistakes
Overwatering is the primary cause of failure, quickly leading to root and stem rot. Placing the plant in low-light conditions results in etiolation (weak, stretched growth) and susceptibility to pests like mealybugs.
References
Watering
10-30 Days
Allow soil to dry out 100% between waterings. Cease watering during winter dormancy.
Soil
Well-draining, pumice and sand-rich cactus mineral mix
Prefers mineral soils rich in pumice, gravel, coarse sand, and minimal organic matter.
Safety
Pet Friendly
Non-toxic, but features sharp spines that can cause mechanical injury to skin and pets.
Difficulty
Moderate
Easy to moderate; highly resilient provided it is kept dry in winter and given bright light.
Native Habitat
North America (Texas, Northern Mexico)
Native to the rocky limestone hillsides, gravelly plains, and semi-arid grasslands of Southern Texas and Northern Mexican states such as Coahuila, Nuevo Leon, and Tamaulipas.
Frequently Asked Questions
How often should I water Coryphantha sulcata?
Water deeply in summer only after the soil has dried out completely (approx. every 10 days). In winter, withhold water entirely to prevent rot.
Is it toxic to pets?
No, it is chemically non-toxic, but the sharp spines can cause physical injury to curious pets.
Is it cold hardy during winter?
Yes, it is remarkably cold-hardy down to -12°C (10°F) for brief periods, but only if the soil is kept absolutely bone-dry.
Where should I place it indoors?
Place it in the brightest spot available, such as a south- or west-facing windowsill that receives direct sunlight.
What kind of pot and soil should be used?
Use a well-draining clay pot with drainage holes and a gritty cactus mix high in pumice, sand, and fine gravel.
When and how does it bloom?
It produces large, showy yellow flowers from the grooves at the top of the stem in late spring to summer.
What is its growth rate?
It is slow-growing, but over several years, it will offset from the base to form attractive, clustered mounds.
My cactus is getting soft, what should I do?
Softening usually indicates root rot due to overwatering. Stop watering immediately, and check the roots. You may need to propagate healthy offsets to save the plant.
Should I fertilize this cactus?
Apply a low-nitrogen cactus fertilizer once or twice during the active spring and summer growing season; do not fertilize in winter.
How do you propagate offsets?
Carefully detach offsets from the base in spring, let the cut callouse for a few days, then place on dry, sandy cactus soil until roots form.