Plate No. 33
Powder Puff
Mammillaria bocasana
"A cushion of white silken hair"
Native to
San Luis Potosí, central Mexico

History
A brief account
One of the most-loved mammillarias, forming dense clusters of soft globes covered in feathery white spines — but beware, each carries a hooked spine hidden beneath. In spring the cushion is crowned with a ring of cream flowers.
How to care for
Powder Puff (Mammillaria bocasana) grows best when its natural cycle of strong light, freely draining soil and measured watering is respected. Give it bright direct sun. Water it according to its seasonal needs: lightly every two weeks in summer; dry in winter. Plant it in standard fast-draining cactus mix. A container with an unobstructed drainage hole is essential, because moisture lingering around cactus roots can quickly lead to rot.
Keep its temperature needs in mind: 5–30°c. frost-tender. During active growth, check the compost before watering rather than following a rigid calendar, since heat, light and pot size all change how quickly it dries. Reduce watering during cool or dormant periods, keep the plant well ventilated, and wait until the growing medium is dry before watering again.
How to propagate
Offsets divide easily. Separate established offsets during the warmer growing season, using clean tools and preserving any roots already attached. Allow damaged surfaces to callus before potting into a dry, mineral-rich mix, then water cautiously while the new root system establishes.
Young cacti are especially vulnerable to excess moisture. Use a small pot with excellent drainage, provide bright filtered light while roots establish, and move the new plant gradually into the light, temperature and watering conditions preferred by a mature Powder Puff.
Cultivation
Quick tips for care & planting
- Light
- Bright direct sun.
- Water
- Lightly every two weeks in summer; dry in winter.
- Soil
- Standard fast-draining cactus mix.
- Temperature
- 5–30°C. Frost-tender.
- Propagation
- Offsets divide easily.