Mammillaria bocasana, commonly known as Powder Puff Cactus, is an attractive cactus native to central Mexico. It is found between 5,400 and 7,500 feet (1,650 and 2,300 m) above sea level and grows on canyon walls, in volcanic rock and semi-desert environs, often under bushes of native plants. This cactus is protected from collecting in the wild in Mexico.
Powder Puff Cactus grows rapidly and produces small round offsets, which cluster around the parent plant. The body of the cactus is blue-green, stocky, and made up of short stems that hug the ground. The entire plant is covered in silky white hairs covering the reddish-brown spines (one hooked) that also coat the whole cactus. The flowers are small, white, yellow, pink, or red.
Growing Conditions and General Care
This cactus is only suitable for outdoor life in USDA plant hardiness zones 9b to 11b. For gardeners in most zones, only indoor potted Powder Puff Cactus is an option.
Powder Puff Cactus needs plenty of sunlight and warm temperatures. It is happy as long as temperatures are between 70 and 80 °F (21 to 27 °C) and at least 8 hours of sunlight. During the winter, it becomes dormant and can be held in a dry, cool room of the house. Exposure to temperatures between 60 and 65 °F (16 and 18 °C) helps encourage flowering in spring. Move Powder Puff Cactus outside in summer.
The potting soil needs to be porous so it can drain well. Allow the soil to become nearly dry between waterings, but then water thoroughly. Never let the pots sit in water. Suspend watering in the winter.
Fertilize Powder Puff Cactus in spring with a 5-10-5 liquid fertilizer. Continue to feed the potted plant in summer every month. Suspend fertilizer in fall and winter when the plant is dormant.
Other than that, you need to watch for some pests such as whiteflies and mites.
This cactus likes to be a little pot-bound and only needs repotting every 3 to 5 years.
Powder Puff Cactus can be propagated from seed or offsets. Seedlings take a long time to form adequate plants, so the best way to start new plants is from division. The small offsets that cluster around the parent plant are easy to pull away. Lay the offset on the counter in a warm, dry location for a day or two to form a callus. Plant it in a cactus mix or sandy potting soil.
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