Crown cactus care guide

Rebutia

Also known as: Sulcorebutia, Rebutia minuscula

Cacti
Care level: Moderate

Pets and children

Caution advised

The bristly spines can lodge in skin or a pet's mouth; keep it out of reach and see a veterinarian (or a doctor, for a child) if one sticks or a piece is eaten.

How often to water Crown cactus

Spring–Summer (Mar–Sep): Every 14 days; A summer grower from high mountains that dislikes heat: water once dry in spring, as a guide, but from the rainy season through midsummer wait one to two weeks after the soil dries.
Autumn (Oct–Nov): Every 10 days; Growth resumes once the heat passes: water when the soil dries, about every ten days, then stretch the gaps in November.
Winter (Dec–Feb): Every 30 days; Nearly dry, lightly moistened about once a month on a mild day; the dry cold sets the spring buds.

Light and placement for Crown cactus

Generally full sun and moving air outdoors in spring and fall; in midsummer about 30 to 50 percent shade with airflow, out of the rain, and plenty of winter sun helps the buds form.

Overwintering Crown cactus

Overwintering guide: 0°C (32°F) or above

Kept dry it tolerates near 0°C; as a guide, it overwinters under the eaves or at a bright window as long as it escapes frost, and a cool, dry spot gives more spring flowers than a warm room.

Fertilizing and repotting Crown cactus

Fertilizer

It needs little feeding: diluted liquid fertilizer about once a month in April to June and September to October, and none in midsummer or winter.

When to repot

Spring–Summer (Mar–Sep)

Common problems with Crown cactus

Overwatered in midsummer heat, the clump rots from the base.
Wintered in a warm room, it skips the spring flowers.
Spider mites spread in dry indoor air and leave the skin brown and rough.

Tips for growing Crown cactus

Flowers rise from near the base one after another and open in daytime sun.
Offsets from the clump can be removed at repotting, dried for a few days, and potted up.
In summer, keep it in the coolest, airiest spot you have and sprinkle water around the pot in the evening to ease the heat.

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.

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