A fragrant (and winter-hardy) variety, Syringa vulgaris 'President Lincoln'; a one-gallon pot is $27.95 at White Flower Farm. For warmer climates, try S. x chinensis 'Lavender Lady'; a 6- to 12-inch plant is $18 at Fox Hill Lilac Nursery.
Lilacs As spring gets into full swing, if you detect a sweet fragrance floating on the breeze, chances are it's a lilac. This beauty originally comes from southeastern Europe and eastern Asia. Its distinctive scent and lovely blooms helped it become one of the most popular flowering shrubs in North America.