Gymnocalycium damsii, commonly referred to as the chin cactus, is a compact, globular cactus species appreciated for its distinctive ribbed form and vibrant flowers. The plant typically reaches 4–6 cm in height and 6–10 cm in diameter, with a dark green to purplish-brown body that may bronze under strong light. Its spines are short and curved, often appearing in clusters along the ribs. During the growing season, it produces funnel-shaped flowers in shades of pale pink, white, or violet, which emerge from the plant's apex.

This slow-growing species can form small clumps over time through offsetting. Its manageable size and low maintenance requirements make it suitable for most growers. 

Native to: Gymnocalycium damsii is native to parts of South America, including regions of Argentina and Uruguay. It typically inhabits arid and semi-arid areas, often found in rocky terrains and open grasslands at elevations ranging from 200 to 600 metres above sea level. 

Water: During the active growing season (spring and summer), thoroughly water the plant when the soil has completely dried. Reduce watering in autumn, and keep the plant almost dry in winter, watering only enough to prevent shrivelling. Ensure the pot has adequate drainage to prevent waterlogging, which can lead to root rot.

Light: Prefers bright, indirect light. While it can tolerate some direct sunlight, especially in the morning or late afternoon, prolonged exposure to intense midday sun can cause scorching. A south or east-facing windowsill is ideal.

Humidity: Gymnocalycium damsii thrives in low to moderate humidity levels typical of indoor environments. High humidity is unnecessary and can be detrimental if combined with poor air circulation, potentially leading to fungal issues.

Temperature: Optimal temperatures range between 18°C and 26°C during the growing season. In winter, the plant can tolerate cooler temperatures down to 5°C, provided it is kept dry. Avoid exposing the plant to frost or freezing conditions.