|These epiphytic, tropical cacti originate from the Southeastern Brazilian rainforest and are grown for their showy, trumpet-shaped flowers. The Crab cactus (or Thanksgiving cactus) blooms from autumn to winter, bearing 3 inch long, white, orange, dark pink, or red flowers. Leaves are fleshy, medium green, pendulous, and truncate. This plant prefers moderate water and humidity and a high potash fertilizer monthly during the growing season. When repotting, do so in a cactus. Light should be bright, but indirect. If grown outdoors in warmer climates, soil should be well drained and neutral to acid. It is not uncommon for buds to drop if conditions become overly dry.