As long as there is rainfall, there is nothing you need to do for these perennial flowers. Perennial flowers return year after year to grace the landscape with their beauty. Plant the flowers in groupings of at least three to appreciate the color. After planting, water well and surround the plants with about 2 inches of mulch, like pine chips or leaf mold.
Dead nettle (Lamium maculatum), which grows to about 12 inches tall and wide, is perennial ground cover. Plant about 12 inches apart in early spring. Dead nettle produces blooms of pink or white over green leaves blotched with white.
Growing up to 3 feet tall in partial to full shade, bleeding heart (Dicentra spp.) presents small heart-shaped blooms in early spring. The blooms may be white, pink or red. Plant bleeding heart in early spring, spacing the plants about 18 inches apart.
Coral bells (Heuchera spp.) are shade-loving perennial flowers that offer a bushy base suitable as a border. Small blooms appear atop a thin stem and display in colors of red, pink, white or coral. Plant coral bells in the spring, spacing them about 12 inches apart.
The blooms of columbine (Aquilegia spp.) are intriguing in design. Plant columbine in the spring or fall and near a walkway so visitors to the garden can admire the blooms of white, blue, pink, purple, red or bi-colors. Columbine grows 1 to 3 feet tall and can be spaced about 12 inches apart in the garden.