Copiapoa tenuissima cultivar 9B

Copiapoa tenuissima is a unique and visually striking cactus species native to the coastal deserts of northern Chile. This species, belonging to the Copiapoa genus, is highly valued by cactus enthusiasts for its distinct features and rarity. Here's a detailed description and some cultivation tips:

Description:

1. Growth Habit: Copiapoa tenuissima typically grows in dense clusters or mounds, forming a compact mass of individual stems.
2. Stem: The individual stems are slender and columnar, usually not exceeding 1-2 cm in diameter and up to 10-15 cm in height. The color of the stems ranges from dark green to almost black.
3. Spines: The spines are one of its most notable features. They are thin, needle-like, and quite dense, covering the stems. They can range in color from yellowish to dark brown.
4. Flowers: It produces small yellow flowers, which typically bloom from the crown of the stem. The flowering period is usually in the summer.
5. Fruit: The fruits are small, spherical, and contain seeds, which are the primary means of propagation.

Cultivation Tips:

1. Lighting: Prefers bright, indirect sunlight. While it can tolerate direct sunlight, some shading is beneficial in very hot climates to prevent scorching.
2. Watering: This cactus requires minimal water. Water sparingly and allow the soil to completely dry out between watering sessions. Reduce watering in the winter.
3. Soil: Use a well-draining cactus mix. You can create a mix using regular potting soil, coarse sand, and perlite or pumice.
4. Temperature: It thrives in warm, dry climates but needs protection from frost. During winter, keep it in a cool, dry place.
5. Fertilizing: Fertilize lightly during the growing season with a cactus-specific fertilizer.
6. Repotting: Repot every 2-3 years or when the plant outgrows its pot. Be cautious of the spines during handling.
7. Pests and Diseases: Be vigilant for pests like mealybugs and spider mites. Ensure good ventilation to prevent fungal diseases.

Copiapoa tenuissima, with its unique appearance and growth pattern, makes an excellent choice for cactus collectors and enthusiasts. It's particularly suited for rock gardens, cactus collections, or as a solitary specimen in a pot, offering an exotic and striking visual appeal. With proper care, it can thrive and become a fascinating feature in any collection.