Common Name: Often referred to as the "Woolly Cactus" or "Pencil Cactus"
Family: Cactaceae
Origin: Native to Mexico and parts of the southwestern United States
 
Description:
Stenocactus is a genus of cacti known for its unique, cylindrical, and often ribbed appearance. These cacti typically grow as small, solitary or clustered specimens and can range in height from 10 to 30 cm (4 to 12 inches). Their ribs are pronounced and may have woolly tufts of hair or spines that vary in color from white to yellow or red. In late spring and summer, Stenocactus produces attractive, funnel-shaped flowers that bloom in shades of yellow, pink, or red, adding to their ornamental appeal.
 
Light Requirements:
Sunlight: Prefers bright, direct sunlight for at least 4-6 hours daily. A south or west-facing window is ideal.
Avoid: Prolonged periods of shade, which can lead to etiolation (stretching) and weakened growth.
 
Watering:
Frequency: Water thoroughly during the growing season (spring and summer) when the top 1-2 inches of soil are dry. In fall and winter, reduce watering significantly.
Method: Water deeply and allow excess water to drain out. Never let the plant 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). Can tolerate cooler temperatures, but protect from frost.
Humidity: Prefers low humidity; avoid overly humid conditions to reduce the risk of fungal issues.
 
Fertilization:
Frequency: Fertilize during the growing season with a diluted cactus fertilizer once a month. No fertilization is needed 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 pot.
Method: Carefully remove the cactus from its pot and replace the old soil with fresh cactus mix, taking care not to damage the roots.
 
Pests and Problems:
Common Pests: Look out for mealybugs, spider mites, and scale. Treat infestations promptly with insecticidal soap or neem oil.
Rot: Overwatering can lead to root rot. Ensure proper drainage and allow the soil to dry out between waterings.
 
Additional Tips:
Propagation: 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 rock gardens, container gardens, or as part of a succulent collection. Its unique shape and attractive flowers make it a great focal point.
 
With the right care, Stenocactus can thrive and become a stunning addition to your cactus collection!