Calibrachoa makes a living cascade—tiny trumpet flowers in deep yellow, spilling from containers and hanging baskets all through the heat of summer. Each plant blooms relentlessly without fussing, and the more you cut stems for small bouquets, the fuller it gets.

Plant in a pot with drainage holes and rich potting soil. Water regularly during dry spells, but let the soil dry slightly between drinks. It thrives in the kind of blazing heat that melts lesser annuals.