Red yucca. A rugged succulent perennial looking like a cross between an aloe and a yucca, the red yucca makes an excellent container plant or dramatic specimen in the dry garden. Plants form an upright clump of stiff, linear dark green leaves bearing fine, white threads at the margins and tall stalks of fleshy red and gold flowers in summer. Plant in full sun in well-drained soil and provide only occasional to infrequent water once established. Hardy to 0F. Northern Mexico and southwest Texas.