There’s not a whole lot of mellow about the eye-popping, golden-yellow sphere officially known as Echinocactus grusonii, which belongs in the orbit of every gardener who desires a space light on fuss but deep with dramatic appeal. The color, texture, and shape of golden barrel cactus lend interest, definition, and contrast to any composition. For maximum effect, group it in threes.
It can be grown in a container on a warm, bright patio or in full sun in a garden landscape. Water thoroughly when soil is dry to the touch. Can tolerate temperatures below freezing for brief periods, but is best to protect from frost to prevent scarring.