Bidens bring a long season of tiny, cheerful flowers to baskets and containers without fussing—they just need regular water and a spot with decent light. The blooms keep coming from spring through frost, and they're forgiving enough for a sunny porch or mixed planter.

These sprawl and trail nicely, so they earn their keep spilling over edges or filling gaps where you need color that won't demand deadheading. Grab them in February if you're planting early, or wait until April when everything else is going in the ground.