Chin cactus care guide
Gymnocalycium
Also known as: Moon cactus, Gymnocalycium denudatum, Gymnocalycium quehlianum
Pets and children
We haven't been able to confirm how this plant affects pets or small children. If any is eaten, consult a veterinarian or a doctor.
How often to water Chin cactus
- Spring–Summer (Mar–Sep)
- Every 10 days
- A summer grower that pauses a little in the Japanese midsummer: water well two or three days after the soil dries through, and sparingly in the evening in July and August, as a guide.
- Autumn (Oct–Nov)
- Every 14 days
- Growth returns as it cools: water about a week after the soil dries, as a guide.
- Winter (Dec–Feb)
- Every month
- Dormant: nearly dry, with a light watering about once a month on a warm morning, as a guide; keep grafted moon cacti a little warmer.
Light and placement for Chin cactus
Among cacti it prefers gentler light, generally filtered through a sheer curtain or with morning sun only, as a guide; midsummer sun reddens or scorches the skin, and it does well at a bright indoor window.
Overwintering Chin cactus
Overwintering guide: 5°C (41°F) or above
Kept dry it generally takes about 5°C: as a guide, bring it to a bright window when nights fall below 8°C and rest it dry, and keep grafted moon cacti off cold floors, since a chilled rootstock weakens them.
Fertilizing and repotting Chin cactus
Fertilizer
Feed lightly: diluted liquid fertilizer about once a month from April to September and none in fall or winter, as too much cracks the skin or stretches the body.
When to repot
Spring–Summer (Mar–Sep)
Common problems with Chin cactus
- Midsummer sun turns the skin reddish-brown and scorches it.
- Watered in winter, it rots and goes soft from the base.
- A moon cactus's aging rootstock fails, taking the red top with it.
Tips for growing Chin cactus
- It dislikes harsh light, so it suits a room better than most cacti.
- A moon cactus has no chlorophyll and cannot live on its own, so keep the rootstock healthy.
- Watering only after the skin wrinkles keeps the roots from rotting.
These are AI-generated general guidelines. They vary with the variety, the placement and the pot size. For effects on pets or children, consult a veterinarian or a doctor.
Keep your plant log going
Greenery is a free app that keeps your plant care going, with watering reminders and photo records. Available on iOS and Android.
