Calibrachoa spreads low and wide, spilling over baskets and bed edges with hundreds of small trumpet flowers from planting through fall heat. The Million Bells name fits: each plant becomes a dense mound of bloom in months when most things slow down.

Full sun keeps it floriferous; water regularly since the fine foliage dries fast. Pair it with upright partners in hanging baskets, or let it tumble down a sunny slope and skip the deadheading.