The purple Prickly Pear,

Purple Prickly Pear is very drought tolerant, needing little to no water once fully established. Plant this cactus in full sun in any well-drained soil. Purple Prickly Pear is susceptible to cochineal scale, which appears as a white, cottony tuft. Spaying the scale off with water can control it. Water young plants twice a month in summer, once a month or less in the winter. Prune diseased or damaged pads in the summer.