Hedgehog cactus care guide
Echinocereus
Also known as: Rainbow hedgehog cactus, Echinocereus
Pets and children
Caution advised
Depending on the kind, hard or fine spines can injure a pet's mouth or paws; 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 Hedgehog cactus
- Spring–Summer (Mar–Sep)
- Every 10 days
- A summer grower: as a guide, water thoroughly a few days after the soil dries through, and keep it out of the rain and on the dry side during the rainy season.
- Autumn (Oct–Nov)
- Every 14 days
- Fall soil dries more slowly as it cools, so water about a week after it dries, as a guide.
- Winter (Dec–Feb)
- Every 30 days
- Dormant and nearly dry, with a light moistening about once a month on a warm morning; the dry winter cold sets the flower buds.
Light and placement for Hedgehog cactus
Generally full sun and airflow all year, sheltered from rain; strong light keeps the body compact and colors the spines, but seedlings and plants fresh from indoors need gradual acclimation to midsummer sun.
Overwintering Hedgehog cactus
Overwintering guide: 0°C (32°F) or above
Kept dry, most kinds tolerate around 0°C: as a guide, overwinter under the eaves out of frost and snow or at a sunny indoor window, dry and cold, which is what brings the spring flowers.
Fertilizing and repotting Hedgehog cactus
Fertilizer
It needs little feeding: diluted liquid fertilizer about once a month from April to September and none in winter, since heavy feeding tends to split the body.
When to repot
Spring–Summer (Mar–Sep)
Common problems with Hedgehog cactus
- Rained on from the rainy season into midsummer, it overheats and rots from the base.
- Kept warm and damp over winter, it produces no spring flowers.
- Short of light, the body stretches and the spines lose their color.
Tips for growing Hedgehog cactus
- The large flowers last a few days and open in daytime sun, so sunny days are when to look.
- Clumping kinds spread more offsets in a shallow, wide pot.
- A gritty mix with plenty of pumice or sand 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.
