Cereus spegazzinii f. cristata

This Cereus spegazzinii, also known as Monvillea spengazinii, is a crested form of the cactus from South America, native to regions of Argentina, Bolivia, Brazil, and Paraguay. This form results from a mutation that disrupts apical growth, leading to a fan-like, undulating shape rather than the cylindrical habit typical of the species. In its natural environment, it occurs in open, arid grasslands and rocky outcrops with good drainage and high sunlight exposure.

Care Tips:

• Light: Requires full sun or bright filtered light to maintain form and spine colour
• Water: Water thoroughly when dry; allow potting medium to dry out completely between waterings
• Humidity: Low humidity preferred; sensitive to prolonged damp conditions
• Media: Fast-draining, mineral-rich cactus mix with added pumice or coarse sand
• Temperature: Thrives between 10–30°C; shelter from frost
• Fertiliser: Use a diluted cactus-specific fertiliser during active growth in spring and summer
• Repotting: Infrequent; only when rootbound or medium becomes compacted