Citronella geranium grows tall and airy in full sun, reaching 1.5 to 2 feet with a spread of 0.8 to 1.2 feet. The lemon-scented foliage is the main attraction here—brush against it and the smell lingers on your hands all day.

Use it as a fragrant screen on a porch or tuck it into a sunny spot where you'll brush past it often. It pulls through our Alabama heat without fussing and fills its space quickly once established.