Plate No. 37
Hedgehog Cactus
Echinocereus engelmannii
"Ribbed columns in a magenta crown"
Native to
Deserts of the American Southwest and northern Mexico

History
A brief account
Named for Georg Engelmann, the 19th-century German-American botanist who documented the cacti of the Southwest. In spring its clustered columns are entirely crowned by cerise magenta flowers — one of the true glories of the desert bloom.
How to care for
Hedgehog Cactus (Echinocereus engelmannii) grows best when its natural cycle of strong light, freely draining soil and measured watering is respected. Give it full sun. Water it according to its seasonal needs: moderate in spring; dry through winter. Plant it in very mineral, fast-draining 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 40°c. 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
From seed, or by dividing offsets. 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 Hedgehog Cactus.
Cultivation
Quick tips for care & planting
- Light
- Full sun.
- Water
- Moderate in spring; dry through winter.
- Soil
- Very mineral, fast-draining mix.
- Temperature
- -10 to 40°C. Hardy when dry.
- Propagation
- From seed, or by dividing offsets.