Plate No. 30
Claret Cup
Echinocereus triglochidiatus
"A hedgehog cluster wearing wine-red cups"
Native to
Southwestern United States and northern Mexico

History
A brief account
The state cactus of no place in particular, yet loved throughout the Southwest for its brilliant scarlet flowers that stay open day and night for a full week — a rarity among cacti. Its nectar sustains desert hummingbirds each spring.
How to care for
Claret Cup (Echinocereus triglochidiatus) 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 summer; dry in winter. Plant it in gritty mineral 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: -15 to 35°c. extremely cold-hardy. 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
Offsets divide easily from the cluster. 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 Claret Cup.
Cultivation
Quick tips for care & planting
- Light
- Full sun.
- Water
- Moderate in summer; dry in winter.
- Soil
- Gritty mineral mix.
- Temperature
- -15 to 35°C. Extremely cold-hardy.
- Propagation
- Offsets divide easily from the cluster.