Copiapoa tenuissima GG7

Copiapoa tenuissima is a fascinating cactus species native to Chile, specifically found in the Atacama Desert. It's a member of the Copiapoa genus, known for their unique appearances and adaptations to extremely arid environments. Here's a detailed description and some cultivation tips:

Description:

1. Growth Habit: Copiapoa tenuissima typically grows in clusters, forming small mounds. It's a slow-growing plant.
2. Stem: The individual stems are columnar, often elongated, and can reach up to 15 cm (6 inches) in height. The stem color is a dark green, sometimes appearing almost black under certain light conditions.
3. Ribs & Spines: This species has prominent ribs running along the length of each stem. The spines are thin and needle-like, ranging in color from yellowish to brown. They can be quite dense, covering the ribs.
4. Flowers: It produces small, yellowish or whitish flowers that emerge from the top of the stem. The flowering usually occurs in summer.
5. Fruit: The fruits are small and contain seeds, which are the primary means of propagation.

Cultivation Tips:

1. Lighting: Prefers bright, indirect sunlight. Too much direct sunlight can scorch the stems, so some shading is beneficial, especially in hot climates.
2. Watering: Water sparingly and allow the soil to dry out completely between waterings. Overwatering can lead to root rot, especially in cooler temperatures.
3. Soil: Use a well-draining cactus mix. You can make your own mix with potting soil, coarse sand, and perlite or pumice in equal parts.
4. Temperature: It thrives in a dry, warm environment. Protect it from frost and extremely cold temperatures.
5. Fertilizing: A light feeding with a cactus fertilizer during the growing season can be beneficial. Do not over-fertilize.
6. Repotting: Repot every 2-3 years or when the plant outgrows its pot. Handle gently to avoid damaging the spines.
7. Pests & Diseases: Be on the lookout for pests like mealybugs and scale insects. Good ventilation and proper watering practices are key to preventing most diseases.

Copiapoa tenuissima is an excellent plant for cactus enthusiasts who appreciate unique and rare species. Its striking appearance and adaptation to harsh environments make it a fascinating addition to any collection. With the right care, this cactus can thrive and showcase its distinctive beauty.