Astrophytum capricorne var. niveum Y.Okomura
Astrophytum niveum, Echinocactus capricornis var. niveus
Astrophytum capricorne var. niveum is a slow-growing cactus with a solitary, spherical at first, then cylindrical stem that grows up to 20 inches (50 cm) tall and up to 8 inches (20 cm) in diameter. The epidermis is densely covered with white flacks that give the plant a furry look. The stem has 6 to 8 spines per areole. They are brownish-black, turning grey-chalky as they age, bent upward, not very wavy, and up to 3.6 inches (9 cm) long. Flowers are yellow with a red or orange throat and up to 3.6 inches (9 cm) in diameter.
USDA hardiness zone 9a to 11b: from 20 °F (−6.7 °C) to 50 °F (+10 °C).
How to Grow and Care
Goat's Horn Cactus is a desert cactus that loves the sun and will grow well if provided with plenty of direct sunshine. However, young specimens should be provided with indirect sunlight. Inadequate light could result in poor growth and unnatural shape.
Use alkaline, lime-based soil with good drainage as this species is rot prone.
It thrives in average room temperatures between 60 and 75 °F (16 and 24 °C ) from spring until fall. Then, from late fall to late winter, give them a resting winter at temperatures between 45 and 50 °F (7 and 10 °C).
Average indoor humidity is fine for Goat's Horn Cactus. Provide good air ventilation for healthy growth.
During the active growth period, water this cactus moderately but allow the top 3/4 of the mixture to dry out thoroughly between waterings. During the rest period, give only enough water to prevent the mixture from drying out.
See more at How to Grow and Care for a Goat's Horn Cactus.
This variety is native to Mexico.
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