Cincinnati, Ohio, lies in USDA Hardiness Zone 6, a temperate zone that gives gardeners a choice of flowers to grow as perennials that would be annuals in a colder climate. Cincinnati has a variety of soil types--clays, silts, sands and loam. Check the soil to make sure it doesn"t have a heavy clay content. Clay soil holds too much water, thus requiring the addition of organic matter added. If the soil forms a hard, cracked surface when it dries after a rain, it is a good indication that clay is present.
Common Garden Peony
Common garden peony (aeonia lactiflora) is a perennial that grows from 1 to 3 feet tall with an equal spread. The plant features dark green, lance-shaped leaves and white or pink cup-shaped flowers that grow from 3 to 4 inches across that bloom in the spring and summer. Plant the common garden peony in full sun or partial shade and a rich, moist and well drained soil.
Chinese astilbe (Astilbe chinensis) is a perennial that grows from 16 to 18 inches tall with a spread of 12 to 18 inches and produces lacy, dark-green leaves and mauve or lilac colored flowers that bloom from mid- to late summer, growing in clusters on long spikes. Plant Chinese astilbe in full or partial shade and in a moist, well-drained soil.
Orange coneflower (Rudbeckia fulgida) is a perennial also known as the black-eyed Susan. The plant grows up to 3 feet tall and features base leaves that are oval or lance-shaped, growing up to 5 inches long, with smaller leaves on the stems. The flowers measure under 3 inches across and have a purple-brown central disk surrounded yellow-orange petals. Plant the orange coneflower in full sun and a moist soil. The flowers are a favorite of the local butterfly population.
Daylilies (Hemerocallis hybrids) are perennials that produce grass-like, pale-green leaves that grow from 10 to 40 inches long and a leafless flower stalk the grows higher than the leaves with two or more branches, each branch having several flowers. The flowers open one at a time, last for just one day and come in every color with the exception of true blue and pure white. Plant daylilies in full sun or partial shade and in a soil that is moist and well drained.
Shasta daisy (Leucanthemum X superbum) is a perennial that grows from 2 to 3 feet tall with a spread of 18 inches. The plant produces strap-shaped, dark-green leaves that grow from 8 to 12 inches long as a rosette at the base of the plant. The flowers grow on stems with smaller leaves, have golden-yellow center disks surrounded by white petals and grow from 2 to 5 inches across. Plant the Shasta daisy in full sun and in a moist, well-drained soil with a high lime content.