Though people sometimes refer to catmint as catnip, and vice versa, these plants have some important differences. Like catnip, catmint sports fuzzy, toothed leaves, but they're usually bigger.

Like catnip, yarrow has a long bloom time, but its stems can get floppy as the season progresses. Pruning those floppy stems back to the lower set of leaves around the base of the plant after the ...