The ribs are numerous and pronounced, and the spines are long and can range in color from yellow to tan to red, depending on the age of the plant and the species. The flowers, yellow to orange and purplish and sometimes fragrant, are up to 8 cm (3 inches) across. Barrel cactus ( Ferocactus cylindraceus ). If your cactus has straw-yellow margins along the ridges, it is likely it was exposed to freezing temperatures. In time, the cactus may outgrow the damage if it is not severe. Fungal diseases -- in particular, those caused by members of the Pythium genus -- can also destroy the shallow roots of the barrel cactus. % of people told us that this article helped them. Although they're endangered in the wild, golden barrel cacti are popular staples in households and home gardens. References The disease can occur when a barrel cactus has been in the rain a long time or is constantly watered from above. Flowering usually occurs after the cactus reaches 10-12 inches in diameter. Last Updated: March 29, 2019 If the older cactus comes with the younger cluster, just place it back in the whole. Golden barrel cactus (Echinocactus grusonii) is named for its golden spines and grows in USDA zones 9 through 10. How can I get rid of the leaf or plant growing near my cactus? How can I create a golden barrel cluster? Only seed pods, after flowering. What Is the Difference Between Schlumbergera & Zygocactus? Ironically, barrel cactuses can become sunburned, and they react in almost the same way to a sunburn as they do to freezing temperatures. "I'm planning a succulent garden, and the information on this site eliminated the costly trial-and-error story. The lesions may appear yellow, brown or black. wikiHow marks an article as reader-approved once it receives enough positive feedback. To grow your own, you’ll need some seeds, the right potting mixture, and a little bit of patience. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/c\/ca\/Grow-Golden-Barrel-Cactus-Step-1-Version-2.jpg\/v4-460px-Grow-Golden-Barrel-Cactus-Step-1-Version-2.jpg","bigUrl":"\/images\/thumb\/c\/ca\/Grow-Golden-Barrel-Cactus-Step-1-Version-2.jpg\/aid1723-v4-728px-Grow-Golden-Barrel-Cactus-Step-1-Version-2.jpg","smallWidth":460,"smallHeight":259,"bigWidth":"728","bigHeight":"410","licensing":"