Common Name: Many-Headed Mammillaria
Family: Cactaceae
Origin: Native to Mexico, particularly in the states of San Luis Potosí and Querétaro.
 
Description:
Mammillaria polythele is a charming and compact cactus known for its distinctive appearance and clustering habit. It typically grows to about 10-15 cm (4-6 inches) in height and can spread up to 30 cm (12 inches) in diameter. This species features multiple heads that emerge from a central base, giving it a bushy look. The cactus has prominent tubercles and is covered in fine, white spines that form a soft, woolly appearance. In late spring to early summer, Mammillaria polythele produces small, funnel-shaped flowers that can range from white to pale pink, often blooming in a ring around the top of the cactus.
Light Requirements:
Sunlight: Prefers bright, direct sunlight for at least 4-6 hours a day. A south or west-facing window is ideal.
Avoid: Prolonged periods of deep shade, which can lead to etiolation and weaken the plant.
Watering:
Frequency: Water thoroughly during the growing season (spring and summer) when the top inch of soil is dry. In fall and winter, reduce watering significantly.
Method: Water deeply at the base, allowing excess water to drain out completely. Avoid letting the cactus sit in water to prevent root rot.
Soil:
Type: Use a well-draining cactus mix or create your own by mixing potting soil with sand, perlite, or pumice.
pH: Slightly acidic to neutral (around 6.0 to 7.0).
Temperature and Humidity:
Temperature: Thrives in warm temperatures between 20-30°C (68-86°F). Protect from frost and extreme cold.
Humidity: Prefers low humidity; avoid high humidity environments to reduce the risk of rot and fungal issues.
Fertilization:
Frequency: Fertilize during the growing season with a diluted cactus fertilizer once a month. Avoid fertilizing during winter dormancy.
Type: Use a balanced, water-soluble fertilizer formulated for cacti.
Repotting:
When: Repot every 2-3 years or when the cactus outgrows its container.
Method: Carefully remove the cactus from its pot, minimizing disturbance to the roots, and replace with fresh, well-draining soil.
Pests and Problems:
Common Pests: Watch for mealybugs, spider mites, and scale. Treat infestations promptly with insecticidal soap or neem oil.
Rot: Overwatering can lead to root rot. Ensure good drainage and allow the soil to dry out thoroughly between waterings.
 
Additional Tips:
Propagation: Mammillaria polythele can be propagated from seeds or offsets. Seeds should be sown in a well-draining medium and kept warm and moist until germination.
Display: Ideal for container gardens, rock gardens, or as part of a succulent collection. Its unique form and beautiful flowers make it an attractive focal point.
 
With the right care, Mammillaria polythele can thrive and add charm to your cactus collection!