Garden centres stock these 4-inch annuals in early summer and fall—your chance to grab colour fast without waiting out a whole season. What you get depends on the season and what's in stock, but the idea is the same: a small plant ready to fill gaps, edge beds, or go straight into a pot.

Pair one with a larger specimen for instant fullness, or tuck several into a border for quick coverage. They'll need regular water and decent light to perform, but they're meant to deliver fast.