Copiapoa tenuissima SOUTH OF ANTOFAGASTA is a species of cactus belonging to the Copiapoa genus, native to the region south of Antofagasta, Chile. Here's a description of this plant in English:

Description:

1. Appearance: Copiapoa tenuissima is a generally small-sized plant with spherical or cylindrical stems that can reach a maximum height of about 10-15 centimeters. The shape and size can vary depending on the plant's age and environmental conditions.

2. Color: The stems of this species can be light green, grayish-green, or bluish-green, depending on the growth conditions and exposure to sunlight.

3. Spines: The plant is characterized by yellow or brown spines covering its stems. The spines can vary in length, stiffness, and density, depending on the variety and growth conditions.

4. Flowers: During the flowering season, Copiapoa tenuissima produces yellow or orange flowers that bloom from the tops of the stems. The flowers are usually small but can be quite showy.

Cultivation:

1. Light Exposure: This cactus species requires plenty of direct sunlight for optimal growth. Place the plant in a location where it receives at least 6-8 hours of direct sunlight each day, preferably in a south-facing position.

2. Temperature: Copiapoa tenuissima thrives in warm to moderate temperatures. During the warmer months, the ideal temperatures range between 20°C and 30°C. Protect the plant from frost during the winter, keeping it sheltered from temperatures below 10°C.

3. Soil: Grow Copiapoa tenuissima in well-draining soil, such as a cactus-specific mix enriched with sand or perlite. Ensure the soil has good aeration and effective drainage to prevent waterlogging around the roots.

4. Watering: This species is adapted to survive in drought conditions and should be watered sparingly. Water the plant only when the soil is completely dry during the growing season, reducing watering during the winter when the plant is dormant.

5. Fertilization: Apply a diluted liquid fertilizer specific for cacti once a month during the growing season. Avoid fertilizing during the winter when the plant is resting.

By following these cultivation tips, you should be able to successfully grow Copiapoa tenuissima SOUTH OF ANTOFAGASTA, enjoying its unique beauty and resilience in your garden or on your windowsill.