How to care for chin cactus (Gymnocalycium)

Gymnocalycium

Chin cactus (Gymnocalycium) — a genus of small, globular cacti with ribbed, spiny bodies, usually only a few centimetres tall (up to about 10 cm), bearing funnel-shaped flowers in late spring to early summer; they flower at an early age and often. Chin cactus needs partial shade. Water it about every 14 days while it grows and about every 30 days in the winter rest.

Updated: November 4, 2026

Watering and repotting chin cactus through the year

It lives indoors all year, so it has no sowing or planting dates: it grows from March to September and rests from October to February (the other way round in the southern hemisphere).

Repot it about every 24 months.

When to plant chin cactus?

Plant or repot chin cactus in spring, as it starts into growth; early to midsummer also works. It is a houseplant, so it has no outdoor planting date and no frost decides it: just avoid autumn and winter, when growth slows and fresh compost stays wet too long. After that, move it to a slightly larger pot about every two years, or sooner once roots circle the pot or grow through the drainage holes.

Watering in the growing and resting halves of the year: Watering and repotting chin cactus through the year.

Sources: RHS: How to repot a plant · Penn State Extension: Repotting houseplants

Quick facts

Type	Houseplant
Latin name	Gymnocalycium
Family	Cactaceae
Light	Partial shade
Frost	does not tolerate frost
Repotting	every 24 months
Grown in	At home

Chin cactus care by growth stage

At home

Stage	Watering	Temperature	Feeding
Growth	every 14 days	—	balanced (NPK), 14 days into the stage; balanced (NPK), 35 days into the stage; balanced (NPK), 56 days into the stage; balanced (NPK), 77 days into the stage; balanced (NPK), 98 days into the stage; balanced (NPK), 119 days into the stage; balanced (NPK), 140 days into the stage; balanced (NPK), 161 days into the stage; balanced (NPK), 182 days into the stage
Winter rest	every 30 days	—	—

Growing notes

Light

Bright, filtered or indirect light; direct sun can scorch the body, especially of grafted colourful “moon cactus” forms, which have no chlorophyll and live on a green rootstock.

Soil

Standard cactus compost or a well-drained cactus and succulent mix, in a pot only slightly larger than the plant.

Care

Water sparingly and let the mix dry out completely between waterings; in winter keep it almost dry. Overwatering or high humidity invites fungal rot. It likes 20–30 °C while growing and is not frost tolerant: bring outdoor plants in before temperatures drop below 10 °C. Feed every two to three weeks with a balanced liquid feed in the growing season only. Repot about every 2 years into a slightly larger pot, since it flowers best when slightly pot-bound. Watch for mealybugs and spider mites. Propagate from seed or from offsets.

Pests and diseases of Chin cactus

1 problem is recorded for chin cactus; it has a page with symptoms, treatment and prevention.

Pests

Two-spotted spider mite

Other plants of the Cactaceae family

Chin cactus belongs to Cactaceae; 6 other plants of this family have a guide here.

Plant lists it is in

Part of: Houseplants · Houseplants that need little water

Sources

Figures checked against these sources.