Amethyst Treasure Hibiscus, Hibiscus Seeds, 10 Seeds, Perennial Hibiscus, Hibiscus Flower LifeCycle: Perennial Zone: 5-9 Sun: Full Sun Hardy heat-loving, drought-tolerant plants plants tolerate moist soil conditions. Full sun. Bushy, well-branched 24-36 plants produce a flurry of 6-8 dinner-sized, five-petalled blooms.