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Common Name: Narrow-spined Gymnocalycium
Family: Cactaceae
Origin: Native to Argentina, particularly in the provinces of Córdoba and La Rioja.

 

Description:

Gymnocalcium stenopleurum is a small, attractive cactus characterized by its distinctive ribbed, globular shape. It typically reaches a height of 10-15 cm (4-6 inches) and can spread up to 10 cm (4 inches) in diameter. The cactus has 5-7 prominent ribs and is covered in narrow, fine spines that can be white or yellow, creating a unique texture. In summer, Gymnocalcium stenopleurum produces beautiful, funnel-shaped flowers that can range in color from white to pink, enhancing its ornamental value.

Light Requirements:

  • Sunlight: Prefers bright, indirect sunlight to full sun. Ideally, it should receive 4-6 hours of direct sunlight daily.
  • Avoid: Prolonged periods of deep shade, which can cause etiolation and weaken the plant.

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, allowing excess to drain away. 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 overly humid environments to prevent rot and fungal issues.

Fertilization:

  • Frequency: Fertilize during the growing season with a diluted cactus fertilizer once a month. Do not fertilize 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 and replace the old soil with fresh, well-draining mix, ensuring minimal disturbance to the roots.

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 proper drainage and allow the soil to dry out between waterings.

Additional Tips:

  • Propagation: Gymnocalcium stenopleurum 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 a lovely addition.

With the right care, Gymnocalcium stenopleurum can thrive and add a touch of charm to your plant collection!

Gymnocalcium stenopleurum (chin cactus)

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