Pack Size: 20, 100, 300
Year: 2026
Accepted Scientific Name: Mammillaria crinita DC.
Horticultural Name: Mammillaria zeilmanniana var. albiflora
Synonym: Mammillaria zeilmanniana f. albiflora hort.
Common Name: White Flowering Rose Pincushion Cactus
Origin and Habitat:
Mammillaria zeilmanniana var. albiflora is a distinctive white-flowering horticultural form of Mammillaria zeilmanniana, a cactus native to central Mexico, particularly the mountainous regions of Guanajuato. The original species inhabits rocky hillsides, dry grasslands, and open scrub vegetation, growing in shallow, well-drained soils among rocks and sparse shrubs. These environments experience warm summers, cooler winters, and seasonal rainfall followed by extended dry periods. Plants frequently grow partially sheltered by surrounding vegetation, which provides protection from intense sunlight. The albiflora form originated in cultivation and is distinguished by its creamy-white flowers rather than the pink to magenta flowers typical of the species.
Description:
Mammillaria zeilmanniana var. albiflora is a compact, moderately slow-growing cactus characterized by its globular to short cylindrical shape and attractive white flowers. Mature individual stems typically reach approximately 2.5–5" tall and 2–3" in diameter. The glossy green body develops numerous closely spaced, rounded to conical tubercles arranged in spirals.
Each areole produces approximately 15–18 fine, white radial spines, accompanied by several stronger reddish-brown central spines, usually including one distinctly hooked spine. Young areoles may develop a small amount of white wool, adding to the plant's ornamental appearance.
Mature plants produce attractive, funnel-shaped flowers approximately 0.6–0.8" across, displaying creamy-white to pure white petals with pale yellow centres. Flowers emerge in circular arrangements around the crown, primarily during spring and summer, although additional flowering may occur under favourable conditions.
Older plants frequently produce numerous basal offsets, gradually developing dense clusters of rounded stems. Following flowering, small pale green to pinkish fruits may develop, containing numerous black seeds. Its compact growth, decorative hooked spines, and unusual white flowers make it a desirable addition to Mammillaria collections.
Cultivation:
Zone: 9–11; protect from prolonged frost and excessive winter moisture.
Temperature: Optimal growth at 18–28 °C. Maintain winter temperatures above 5 °C for reliable cultivation.
Growth Rate: Slow to moderate, initially developing compact globular stems before becoming short cylindrical and producing numerous basal offsets.
Soil: A fast-draining cactus mixture containing pumice, fine gravel, and a moderate proportion of organic matter. Good drainage and adequate root aeration are essential for healthy growth.
Watering: Water thoroughly during active growth, allowing the growing medium to dry between waterings. Reduce watering significantly during autumn and keep mostly dry during winter dormancy.
Fertilizing: Apply a diluted, low-nitrogen cactus fertilizer every 2–3 weeks during active growth. Discontinue feeding during winter.
Light: Bright, indirect light to partial sun. Gentle morning sunlight encourages compact growth, healthy spination, and abundant flowering. Protect from intense afternoon sunlight during extreme heat, particularly for young plants.
Pests and Diseases: Susceptible to mealybugs, root mealybugs, spider mites, scale insects, and root rot associated with excessive moisture or poorly draining growing media.
Germination Info:
Temperature: 27 °C.
Surface Sown: Yes. Sow seeds on the surface of a fine, sterilized cactus growing medium and press lightly into place without burying deeply.
Germination Time: Approximately 7–28 days under favourable conditions, although some seeds may require longer.
Moisture: Maintain consistent surface moisture and high humidity during germination, avoiding waterlogged conditions.
Light: Bright, indirect light. Avoid direct sunlight on covered seed trays.
After Germination: Gradually increase ventilation as seedlings establish. Maintain moderate moisture until young plants develop stronger root systems. Introduce brighter light gradually as seedlings mature and begin producing characteristic tubercles and spines.
