Gymnocalycium tomina

Gymnocalycium tominaGymnocalycium tomina Gymnocalycium tomina is a solitary or slowly clustering cactus Stem: 10 15 (25) cm in diameter, 10 cm tall, pale green that turns to an orangish purple in full sun. The epidermis has a velvety appearance. The apex is slightly depressed and woolly. Ribs: 10 to 12 thick, divided into polygonal rounded (not chinned) tubercles, separated by arched furrows. Spines: Strong, bent, initially blackish with a brown base then becoming grey

Gymnocalycium tomina
Gymnocalycium tomina is a solitary or slowly clustering cactus
Stem: 10-15 (25) cm in diameter, 10 cm tall, pale green that turns to an orangish purple in full sun. The epidermis has a velvety appearance. The apex is slightly depressed and woolly.Ribs: 10 to 12 thick, divided into polygonal rounded (not chinned) tubercles, separated by arched furrows.Spines: Strong, bent, initially blackish with a brown base then becoming grey-pinkish with black point.

Gymnocalyciums are very gratifying plants. They are easy to cultivate, and their flowering is abundant if we give them a well drained relatively rich substrate (if possible, not limestone). Water regularly in summer (but do not over-water). Keep rather dry in winter. It needs frequent repottings and a very luminous exposure, but avoid direct exposure to the sun's rays. This species is particularly easy and accommodating, and seldom suffers from cryptogamic diseases. Feed with a high potassium fertilizer in summer. Hardy as low as -5° C (or less) if kept dry.

Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz