(Perovskia atriplicifolia)
It’s hard not to like a plant that needs little maintenance, is pest resistant, and is also attractive. “Its gray foliage and light blue flowers pair well with practically anything, and the plant’s airy openness adds lightness to the garden—and it integrates well with other plants,” said Kris Jarantoski, executive vice president and director. Give it full sun and well-drained soil. Russian sage is in the Heritage and Rose Gardens, among other places.