Echinocereus viereckii subsp. morricalii (Ríha) N.P.Taylor
Echinocereus morricalii (basionym), Echinocereus viereckii var. morricalii
Echinocereus viereckii subsp. morricalii is a cactus with almost spineless stems that branch profusely from the base. The stems are yellowish-green to bright green, up to 20 inches (50 cm) long and up to 3 inches (7.5 cm) in diameter. They will turn purple in full sun. During the winter rest they become wrinkled from lack of water. The flowers are bright magenta, funnel-shaped, up to 4 inches (10 cm) in diameter and appear in spring.
USDA hardiness zones 9b to 11b: from 25 °F (−3.9 °C) to 50 °F (+10 °C).
How to Grow and Care
If you can successfully grow other globular cactus, you can most likely grow Echinocereus well. One of the key factors in success with these is avoiding any hint of wet soil. Because their root systems are weak, they are especially prone to root rot, which will eventually kill your plant. Otherwise, they thrive on a program of strong, bright light, slight water and a steady diet of light fertilizer. These cacti are vulnerable to mealybugs and aphids.
Echinocereus are slow growing cacti that should only need repotting every other year or so. You can prolong the time to repotting by removing plantlets and potting them up in their own pots. When repotting a cactus, carefully remove it from its pot and knock away any clumped soil. These plants tend to be shallow-rooted with weak root systems, so take care not to damage their roots.
Learn more at How to Grow and Care for Echinocereus.
Echinocereus viereckii subsp. morricalii is native to Mexico.
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