Plate No. 36

Chin Cactus

Gymnocalycium bruchii

"A cushion of small globes crowned in pink"

Native to

Sierras of Córdoba, Argentina

Botanical illustration of Chin Cactus
Gymnocalycium bruchii — drawn from life
History

A brief account

The smallest of the gymnocalyciums, clustering into tight mats no more than a hand's width. In spring the cluster is smothered in soft pink flowers, sometimes covering the plant entirely.

How to care for

Chin Cactus (Gymnocalycium bruchii) grows best when its natural cycle of strong light, freely draining soil and measured watering is respected. Give it bright light with a little direct sun. Water it according to its seasonal needs: moderate in summer; dry in winter. Plant it in standard cactus mix. A container with an unobstructed drainage hole is essential, because moisture lingering around cactus roots can quickly lead to rot. Keep its temperature needs in mind: -10 to 30°c. cold-hardy when dry. During active growth, check the compost before watering rather than following a rigid calendar, since heat, light and pot size all change how quickly it dries. Reduce watering during cool or dormant periods, keep the plant well ventilated, and wait until the growing medium is dry before watering again.

How to propagate

Offsets divide freely. Separate established offsets during the warmer growing season, using clean tools and preserving any roots already attached. Allow damaged surfaces to callus before potting into a dry, mineral-rich mix, then water cautiously while the new root system establishes. Young cacti are especially vulnerable to excess moisture. Use a small pot with excellent drainage, provide bright filtered light while roots establish, and move the new plant gradually into the light, temperature and watering conditions preferred by a mature Chin Cactus.
Cultivation

Quick tips for care & planting

Light
Bright light with a little direct sun.
Water
Moderate in summer; dry in winter.
Soil
Standard cactus mix.
Temperature
-10 to 30°C. Cold-hardy when dry.
Propagation
Offsets divide freely.