Full-sun exposure fuels buddleia's growth, specifically the Butterfly Candy variety, says Linda Vater, plant expert for Southern Living Plant Collection and Butterfly Candy Buddleia. It comes in five pretty shades, from purple and pink to white, and is drought-tolerant and easy to care for. "I find it so much fun to work in the garden with butterflies fluttering in and amongst these exquisite shrubs," says Vater. "They come in absolutely glorious colors and just keep on blooming throughout the season."