Scientific Name
Leuchtenbergia principis Hook.
Common Name(s)
Agave Cactus, Cob Cactus, Prism Cactus
Scientific Classification
Family: Cactaceae
Subfamily: Cactoideae
Tribe: Cacteae
Genus: Leuchtenbergia
Origin
Leuchtenbergia principis is native to north-central Mexico (San Luis Potosi, Chihuahua).
Description
Leuchtenbergia principis is a unique cactus with a cylindrical stem and long, grayish-green tubercles with purplish-red blotches at the tips and topped with papery spines, which makes it resemble an Agave. It slowly grows and can reach up to 28 inches (70 cm) in height. The stem becomes bare and corky at the base with age. The tubercles are triangular in cross-section and grow up to 3 inches (12.5 cm) long.
After four years or so, yellow, funnel-shaped flowers appear at the tip of the tubercles from spring to fall. The flowers can reach up to 2.4 inches (6 cm) in diameter. The fruits are smooth and green and can grow up to 1.2 inches (3 cm) long and 0.8 inches (2 cm) in diameter.
Leuchtenbergia principis is the only species of the genus.
Hardiness
USDA hardiness zones 9a to 11b: from 20 °F (−6.7 °C) to 50 °F (+10 °C).
How to Grow and Care
Agave Cactus is reasonably easy and tolerant and should grow well, given the basic guidelines for growing cacti and other succulents. However, this desert species adapted to arid conditions seems to benefit from intense solar radiation. Therefore, it should always be moved to a position outside during the warmer months of spring through early fall to benefit from exposure to direct sunlight and summer's increased temperatures.
If grown exclusively indoors, this species will slowly languish in the comparatively low light levels of interior spaces and probably never thrive. However, it has proven to be a reliable bloomer when grown outdoors, invariably producing intermittent blooms from spring to fall.
Agave Cactus tolerate a remarkable amount of rain during their outdoor growing season. Still, their large, turnip-like roots can be very susceptible to root rot when exposed to extended cold and wet conditions. So, the potting medium should be especially gritty to provide that extra drainage necessary for this species. Also, extra care should be given through winter to prevent overwatering this species. Many growers do not water this plant at all in the winter.
Agave Cactus is usually propagated by seeds, as it rarely pups or produces offsets. It has been reported that plants can be propagated by tubercle cuttings, but this method is uncommon.
Links
- Back to genus Leuchtenbergia
- Succupedia: Browse succulents by Scientific Name, Common Name, Genus, Family, USDA Hardiness Zone, Origin, or cacti by Genus
Photo Gallery
Click on a photo to see a larger version.
