South Carolina has four USDA (United States Department of Agriculture) hardiness zones, that of 7a through 8b. Plants that thrive in South Carolina will be those plants that not only are hardy to those numbers, but go at least one zone further (hardy to zone 6). South Carolina has mild winters, hot summers, and plenty of coastal land. All of these conditions will make a selection planted in South Carolina need to tolerate more than a plant in the midwest garden. South Carolina flowering plants will live and thrive in a variety of conditions in these warm season hardiness zones. Each of these selections are hardy and have zone numbers of 7a or colder. Any of these selections should be fine for growth in a South Carolina garden.
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The orange cosmos (Cosmos sulphureus) is an easy to grow and fast growing annual. It is drought tolerant and will attract butterflies. It is from the aster/daisy family. There are many cultivars of orange cosmos, the average getting one to seven feet tall. Flowers are two to three inches wide in yellow or orange. Plant an orange cosmos in full sun in well drained sandy soil. Propagate via seed in fall or spring.
The tatarian aster (Aster tataricus) is a perennial that attracts butterflies to the landscape. It is from the aster/daisy family of plants. The average tatarian aster gets six to eight feet tall with leaves up to twenty four inches long. Stalks hold lavender (or blue) flowers one inch wide. Plant a tatarian aster in moist soil in full sun to partial shade. Propagate via root mass division in spring.
The small globe thistle (Echinops ritro) is a perennial that attracts butterflies. It is from the aster/daisy family. The average small globe thistle has eight inch herbaceous leaves with two to three foot tall stems. Tubular flowers are one to two inches wide from silver blue to bright blue. Plant a small globe thistle in poor sandy soil in full sun with regular watering. Propagate via spring seed or winter root clump division.
The sweet alyssum (Lobularia maritime) is a fragrant perennial grown as an annual. It is from the cabbage family. The average sweet alyssum gets nine inches high with white, pink, or purple flowers in terminal clusters. Flowers smell like honey. Leaves have small white hairs and are one inch long. Plant a sweet alyssum in full sun and enriched soil. Propagate via seed.
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