Sulcorebutia crispata is a charming, low-growing cactus that readily forms clusters of small, globular stems adorned with distinctive, short black spines pressed flat against its mauve to violet-green tubercles, creating a subtle "fishbone" pattern. In spring, it bursts forth with disproportionately large and vibrant magenta flowers that emerge from near the base of the stems, offering a striking contrast to its petite form and dark spination. This Bolivian native is a favorite for its compact size and impressive floral display.
 
Appearance:
Stems: Typically forms small, globular to somewhat flattened, clustering bodies. Individual stems are usually 2-4 cm tall and 3-5 cm in diameter. It readily forms clumps, sometimes creating quite dense mounds.  
Tubercles: The stem surface is covered in flat tubercles, about 5mm wide, arranged in up to 16 spiral lines that merge at the apex. The color of the tubercles can vary between violet-green and a brighter mauve.  
Areoles: Long and narrow with short white felt.
Spines: Characteristically has 9-11 short, black radial spines, only 1-2 mm long. These spines are flattened against the tubercles and point diagonally downwards, often giving a distinctive "fishbone" appearance. Some varieties or forms might have slightly different spination, sometimes appearing more bristly or curved.
Roots: Conical.
Flowers: Produces relatively large and showy funnel-shaped flowers, typically 2-5 cm long and 3.5-5 cm wide. The floral tube is yellowish-green with tan-colored scales, and the tepals are usually a deep magenta with a clearer throat. Flowers arise from areoles near the base of the stems.
Fruit: Reddish-brown, small (4-5 mm wide).
 
Native Habitat:
Native to the high-altitude regions of Bolivia in South America.  
Cultivation and Care:
Light: Requires bright light to maintain a compact form and encourage flowering. While it appreciates full sun, it's advisable to provide some protection from intense afternoon sun during the hottest months to prevent scorching.  
Temperature: Prefers warm temperatures during the growing season but needs a cool and dry winter rest (around 0-10°C or 32-50°F) to promote flowering in the spring. It is not frost-tolerant and should be protected from freezing temperatures.  
Watering: Water moderately during the active growing season (typically spring and summer), allowing the soil to dry out completely between waterings. Keep it almost completely dry during the winter rest. Overwatering, especially during the dormant period, is a major risk and can lead to root rot. Ensure good drainage.
Soil: Needs a very well-draining, coarse, mineral-based soil mix. A commercial cactus and succulent mix amended with extra perlite, pumice, or grit is ideal.
Potting: Repot only when the plant has outgrown its pot. Use a pot with good drainage. Be careful when handling the roots as they can be delicate.
Fertilizing: Fertilize sparingly during the growing season with a diluted, low-nitrogen, high-potassium cactus fertilizer, perhaps once a month. Avoid fertilizing during the winter.
Air Circulation: Good air circulation is important to prevent fungal diseases, especially in humid conditions.  
 
Propagation:
Offsets (Pups): The easiest and most common method of propagation is by separating the offsets (small side shoots) that the plant readily produces.
Carefully detach the offsets once they have developed to a reasonable size.
Allow the cut ends to callous over for a few days in a dry, shaded location.
Plant the calloused offsets in well-draining cactus soil.
Water very lightly at first and gradually increase as the roots establish.
Seeds: Can also be propagated by seed, although this is a slower process. Sow seeds in a well-draining seed-starting mix and keep them warm and slightly moist until germination occurs.  
Grafting: Sometimes, Sulcorebutia, including crispata, can be grafted onto more robust rootstock, especially if they are difficult to root or are particularly sensitive to root issues.
 
Key Features and Distinctions:
Clustering Habit: Readily forms clumps of small heads.  
Short Black Spines: The short, black spines lying flat against the tubercles are quite characteristic.
Magenta Flowers: Produces beautiful, relatively large magenta flowers from low on the stem.  
Cool Winter Rest: Essential for flowering and overall health.
Sensitivity to Overwatering: Requires careful watering, especially during dormancy.
 
Sulcorebutia crispata is a delightful small cactus that is prized by collectors for its clustering habit, unique spination, and vibrant flowers. With proper care, including bright light, well-draining soil, and a distinct winter rest, it can be a rewarding addition to any cactus collection.
 
* Picture and information intended only as a guide.  Size and colours of plants will vary, not any 1 plant is exactly the same and minor variations will occur.
 
** All plants will be posted bare rooted.