Choose flowering bushes and trees to fill in oddly shaped or bare spots in the landscape. Flowering bushes spill over rocks, grow under taller plants and fit perfectly under windows. Flowering trees anchor the garden, set the color scheme and work as individual specimen plants as the only flowers on a lawn. A 100-foot tall tree covered in flowers or a bush just 6 feet tall fill different needs, but each can bring in just the right splash of color for your garden.
Common horsechestnut (Aesculus hippocastanum) is also known as European horsechestnut and grows in the temperate zones as far north as USDA Hardiness Zone 3. White flowers with red and yellow markings appear in early spring, growing in clusters at the tip of the stems that grow from 5 to 12 inches long and 2 to 5 inches wide. The tree grows from 50 to 100 feet tall and the leaves are compound, made up of seven 4- to 10-inch long leaflets that turn yellow or brown in the fall. The flowers are followed by light-brown, round, spiny, seed capsules measuring 2- to 2 1/2-inches in diameter. Plant common horsechestnut in full sun and a rich, moist, well-drained soil.
Sargent crabapple (Malus sargentii) grows from 6 to 8 feet tall and about twice as wide. Dark-green, egg-shaped or oval leaves grow from 2 to 3 inches long and 1 to 2 inches wide, turning a mix of yellow and green in the fall. Flowers bloom in April and early May starting out and pink or red buds that open into 1-inch wide, white flowers growing in clusters. The deep-red fruit measures less than 1.2 inches in diameter and follows the flowers in the clusters. Plant Sargent crabapple in full sun and a moist, organic soil.
Meyer lilac (Syringa meyeri) is a member of the olive family that grows up to 6 feet tall and 8 feet wide, spreading out in a oval shape. Plant Meyer lilac in full sun or partial shade and a soil that is moist and well drained. Full sun will produce the most flowers. Medium to dark-green leaves grow up to 1 inch long with wavy edges. Lavender-white or violet flowers bloom in late May growing in 4-inch long clusters.
Blackhaw viburnum (Viburnum prunifolium) grows up to 15 feet tall and from 8 to 12 feet wide. White flowers measure 1/4 inch across and grow in flat-topped clusters measuring 2 to 4 inches across. Dark-green leaves grow from 1 1/2 to 3 1/2 inches long and 2 inches wide, turning purple in the fall. The flowers are followed by edible fruit that starts out pink and matures to black. Plant blackhaw viburnum in full sun to partial shade. The bush is adaptable to different soil conditions.