Mammillaria magnifica

Mammillaria magnifica is a clump-forming cactus from Mexico. Its native range covers the states of Morelos and Puebla. It belongs to the cactus family, Cactaceae. Kew places it in desert or dry shrubland. LLIFLE suggests it may also grow in deciduous forest. Its stems grow fast and produce many offsets. These form broad mounds as the plant ages. It suits pots, though older clumps need room to spread.

The upright, round stems reach 1.3 feet (0.4 metres) tall. Each measures about 0.16–0.30 feet (0.05–0.09 metres) across. Raised, cone-shaped tubercles cover the stems and contain latex. White wool and bristles grow between them. Each spine cluster has four or five central spines, sometimes eight. The lowest has a hooked tip and exceeds the others in length. Most central spines range from yellow-brown to pale brown. Some forms have gold, red, or almost black spines. Each cluster also bears 18–24 short, straight radial spines. These are white or pale yellow. The hooked spines can snag anyone handling the plant.

Pink-red to purple-red flowers form a ring near each stem's top. Each flower reaches about 0.07 feet (0.02 metres) long. Club-shaped pink fruits follow, with green tips and brown seeds. Strong light helps the plant flower and form dense spines. Stems bend toward the sun. Turning the pot can change their direction within weeks.

Use a neutral cactus mix that drains very freely. Give indoor plants bright light with some direct sun. Outdoors, provide bright, warm conditions; afternoon shade is another option. Water well during active growth, but avoid keeping the mix wet. Keep the plant dry through winter. Large pots need less water than small ones. Frost can harm it, so warmth improves the chance of success. LLIFLE suggests a winter rest at 8–12°C. Feed with a high-potassium fertiliser in summer. As clumps widen, use shallow pots with ample drainage.

This species grows on its own roots without special methods. Excess water can cause rot. Watch for spider mites, mealybugs, and scale insects. Mealybugs may hide among the wool or attack the roots. Good light, airflow, and a mineral mix help limit pest trouble. Propagate it from seed or by removing offsets. Let cut surfaces dry before setting offsets into soil. Give seedlings ventilation and shelter from full sun.