It’s tough to beat the floral perfume of lilacs. These flowering shrubs open blooms from late spring to early summer, depending on variety. The blossoms offer traditional colors, like purple, lavender and white, and you can also find lilacs with pink, yellow and even bicolor blooms. A few lilacs actually lack fragrance, so it’s important to do your homework before buying a plant. Some of the most fragrant varieties include wine-red ‘Congo’ (Zones 4-7), pink ‘Maiden’s Blush’ (Zones 2-7), light blue ‘President Grevy' (Zones 3-7) and white ‘Beauty of Moscow’ (Zones 3-7). Plants grow from shrub to small tree size, reaching from 3 to 15 feet tall. Hardiness depends on variety, from Zones 2-9.