Aztekium hintonii Glass & W.A.Fitz Maur.
Aztekium hintonii is a slow-growing cactus with globular to shortly columnar, usually solitary stem. It grows up to 8 inches (20 cm) tall and up to 4 inches (10 cm) in diameter. The stem is grayish-green, slightly woolly at the apex, and has 10 to 15 ribs, well defined, traversed by tiny wrinkles, and up to 0.5 inches (1.3 cm) deep. The short-lived spines are grayish-white, curved, and up to 0.5 inches (1.3 cm) long. Flowers are diurnal, magenta, up to 1.2 inches (3 cm) in diameter, and appear in summer.
USDA hardiness zones 10a to 11b: from 30 °F (−1.1 °C) to 50 °F (+10 °C).
How to Grow and Care
Aztekiums are by far the most challenging and difficult cacti to grow. They are having extremely slow growth, probably the slowest of the entire Cactus family. They usually take several years for growth to be even noticeable. Once a specimen is established on its own roots, it is no trouble to keep it and becomes an easy plant to manage.
Because of the difficulty of cultivation, Aztekiums are most often grafted to hardier stock. They need good drainage and regular water in summer. Keep nearly dry in winter. If grafted, the plants can take a little more water. Just remember the graft stock is also a cactus and will rot if overwatered. Provide shade from midday through the afternoon. A little morning sun is OK.
Learn more at How to Grow and Care for Aztekium.
Aztekium hintonii is endemic to Nuevo León, Mexico.
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