STARDUST Hardy Ice Plant Seeds Delosperma floribunda Vigorous, long-flowering plants that tolerate heat, humidity and drought. Quickly covers hot, dry areas with thick, 6 inch tall, 1 foot wide mat of succulent foliage. Two inch violet flowers with white centers appear in late spring and continue into autumn. A stunning plant, perfect for massing, or use in sunny patio pots or window boxes. Winter hardy to zone 5. Seed is pelleted for easy and efficient sowing.