Succulent stems and small glossy leaves store water like a tiny reservoir, letting this heat-lover shrug off drought and neglect that would wilt tender annuals. Flowers close in shade and rain, but in sun they open into bright, papery blooms that last all season without staking, tying, or constant attention.

Set it in a sunny spot with decent drainage and you're done — no fertilizing, no pinching back, no fussing. Ideal for hot spots, hanging baskets, and the kind of garden that thrives on benign neglect.