Echinocactus grusonii Hildm.
Golden Barrel Cactus, Golden Barrel, Golden Ball Cactus, Golden Ball, Mother-in-Law's Cushion, Mother-in-Law's Seat
Echinocactus corynacanthus, Echinocactus galeottii, Echinocactus grusonii var. albispinus, Echinocactus grusonii var. horridus, Echinocactus grusonii var. intertextus, Echinocactus grusonii var. subinermis, Echinocereus grusonii, Echinocereus grusonii var. azureus, Ferocactus grusonii, Kroenleinia grusonii
Echinocactus grusonii, also known as Kroenleinia grusonii, is a slow-growing cactus with a spherical, usually solitary stem that becomes barrel-shaped with age. The stem ai pale green and heavily ribbed with numerous areoles sprouting sharp radial spines. It grows up to 3.3 feet (1 m) tall and is nearly equal in diameter. The spines are long, straight or slightly curved, in various shades of yellow or occasionally white. Flowers are diurnal, yellow, up to 2 inches (5 cm) in diameter, and appear in a ring at the top of the stem in summer but only on mature specimens (after 20 years or so) receiving enough full sun.
USDA hardiness zones 9a to 11b: from 20 °F (−6.7 °C) to 50 °F (+10 °C).
How to Grow and Care
Golden Barrel Cactus is fairly quickly growing at first, and then the growth rate slows. So you can expect to wait about ten years for the cactus to reach 10 inches (25 cm) in diameter. Like most cacti, it is drought tolerant and needs very little care and attention to grow well. Not enough sunlight and overwatering are common mistakes. When handling, it is best to use gloves to protect your hands from prickly spines.
When it is young and growing, it is best to repot your Golden Barrel Cactus once a year in a slightly bigger container during spring. Once they mature, repot maybe every 2 to 3 years or when necessary.
Learn more at How to Grow and Care for Echinocactus.
You can sow Golden Barrel Cactus seeds outdoors in warm climates, but sowing them indoors is easier and will result in a higher germination rate. Expect the seeds to germinate in one to two months.
Learn more at How to Grow Golden Barrel Cactus from Seed.
This species is endemic to east-central Mexico.
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