Mammillaria magnifica

Mammillaria magnifica is a great looking small columnar plant that offsets eventually but has nasty hooklets that grab you if you get too close. Itis not particularly difficult on own roots. No special cultural requirements.
Growth rate: It is a rapidly growing, clumping species that will produce wonderful clumps of very heavily spined plants. From seed, it will fill a large pot in just a few years. Offsets are produced freely, and are distributed somewhat randomly. Since the plant can make wide spreading mounds, shallow pots of large diameter will be required as the plant ages.
Soils: It likes very porous standard neutral cactus mix soil.
Repotting: Use pot with good drainage.
Watering: It should be watered generously during the growing season, but do not overwater (Rot prone), keep dry in winter. Water it less than average if in bigger pots, small pots preferred.
Fertilization: Feed with a high potassium fertilizer in summer.
Hardiness: Reputedly sensitive to frost, but less so if kept on the dry side prior to, and during, cold weather. However warmth throughout the year will increase the grower's success (8-12°C during rest season).
Exposition: Outside bright, hot conditions or afternoon shade, inside it needs bright light, and some direct sun. Strong light encourages flowering and heavy wool and spine production.
Uses: It is an excellent plant for container growing. It always looks good and stays small.

Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz

Blooming Season	Mid summer
Common Name	-
Dormancy	Winter
Family	Cactaceae
Flower	Pink
Frost Tolerance	32f (0°c)
Growth Rate	Fast growth
Hardiness Zone	9b-11
Height	6-18 in.
Origin	Mexico
Scientific Name	Mammillaria magnifica
Shape	Columnar
Sun Exposure	Full sun to partial shade