Mammillaria zeilmanniana 'Albiflora'
Mammillaria zeilmanniana var. albiflora, Mammillaria zeilmanniana f. albiflora
Mammillaria zeilmanniana 'Albiflora' is an attractive cactus with glossy green stems that grow up to 5 inches (12.5 cm) tall and up to 3 inches (7.5 cm) in diameter. The stems have clusters of 4 (the upper three straight, the lowest hooked) reddish central spines and 15 to 18 soft, white, hair-like radial spines. Rings of white flowers with yellowish stigmas are present most of the year.
USDA hardiness zone 9a to 11b: from 20 °F (−6.7 °C) to 50 °F (+10 °C).
How to Grow and Care
If you can grow cacti and succulents successfully, you can likely grow the popular Mammillaria without too much trouble. To encourage better flowering, allow the plants to enjoy a cooling period in the winter and suspend watering. Unlike many other cacti, which use their ribs as storage devices, the Mammillaria feature raised tubercles, from which spines emerge. When you water, the tubercles will expand to allow for increased water storage. The flowers emerge from the axils of these tubercles on the previous year's growth, which accounts for their interesting halo effect. The cactus mustn't be exposed to prolonged dampness and sitting water. Never let your cactus sit in a dish of water. Lastly, make sure to fertilizer during the growing season for the best results.
Repot as needed, preferably during the warm season. To repot a cactus, make sure the soil is dry before repotting, then gently remove the pot.
See more at How to Grow and Care for Mammillaria.
This cactus is a white-flowered form of Mammillaria zeilmanniana. It was selected in cultivation and not known to occur in the wild.
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