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A distinctive, night-blooming cactus with a multi-branched columnar form and toothpick-like grayish-white spines. In late spring to early summer , showy white blossoms with gray edges open at night and close during the day. Its large size makes it a great focal point in a succulent garden or xeriscape design. Very hardy and can easily tolerate our hot summers. Likes a well drained soil.