Region 08 · North America · Cfa
Horticulture in North America: Southeast & Gulf Coast
Long, hot, humid summers and mild winters; hurricanes, heavy clay and nematodes are the constraints. The region's garden identity is the live oak, the veranda and the warm-season lawn.
ClimateHumid subtropical (Cfa)
USDA zones7–11
Growing seasonMarch to November
RainfallEven, summer maximum; hurricanes
SoilsAcidic clay and sandy coastal soils
Frost riskGrowthRainfall
The climate, read as a season
Peak growth falls in May, Jun, Jul, Aug; dormancy in Jan, Feb, Dec. Hard frost is confined to Jan, and the driest months are none. Those three patterns decide the planting calendar more than the annual average temperature.
| Season | Conditions | What it means |
|---|---|---|
| Spring Mar · Apr · May | Active growth drier spell · frost-free | Maintain, harvest and prepare the next season. |
| Summer Jun · Jul · Aug | Peak growth steady rain · frost-free | The main planting and sowing window. |
| Autumn Sep · Oct · Nov | Active growth drier spell · frost-free | Maintain, harvest and prepare the next season. |
| Winter Jan · Feb · Dec | Dormancy drier spell · hard frost | Dormant: prune, plan and protect. |
What the climate demands
- Heat and humidity drive fungal disease; airflow, spacing and resistant cultivars matter more than spraying.
- Heavy clay and a high water table cause root rot; raise beds and plant on the shoulder.
- Hurricane wind and salt prune the coast; choose flexible, salt-tolerant trees away from the house.
Signature flora
| Plant | Role | Why it is used here |
|---|---|---|
| Live oak Quercus virginiana | TreeNative | The signature tree; wind-firm and salt tolerant. |
| Southern magnolia Magnolia grandiflora | TreeNative | Evergreen; needs space and litter tolerance. |
| Loblolly pine Pinus taeda | ConiferTreeNative | Fast pioneer; pine beetle risk. |
| Bald cypress Taxodium distichum | ConiferTreeNative | Wet feet; knees in saturated soil. |
| Red maple Acer rubrum | TreeNative | Wet tolerant; early fall colour. |
| Yaupon holly Ilex vomitoria | ShrubHedgeNative | Clipped hedge; berries on females. |
| Crape myrtle Lagerstroemia indica | TreeShrubCut flower | Summer flowers; powdery mildew on old cultivars. |
| Camellia Camellia japonica | ShrubCut flower | Winter flowers; afternoon shade. |
| Azalea Rhododendron | ShrubNativeCut flower | Acid soil; lace bug. |
| Oakleaf hydrangea Hydrangea quercifolia | ShrubNativeCut flower | Dry shade; winter bark. |
| Pink muhly Muhlenbergia capillaris | GrassNative | Autumn pink haze; dry sun. |
| Coneflower Echinacea purpurea | PerennialNativeCut flower | Drought tolerant; mildew. |
| Coreopsis Coreopsis | PerennialNativeCut flower | Long bloom; well-drained soil. |
| Blanket flower Gaillardia | PerennialNativeWater-wise | Heat and salt tolerant. |
| Tropical hibiscus Hibiscus rosa-sinensis | ShrubCut flower | Frost-tender; containers. |
| Tomato Solanum lycopersicum | VegetableAnnual | Spring crop; heat stops fruit set in midsummer. |
| Sweet potato Ipomoea batatas | Root cropVegetable | Long warm season; loose soil. |
| Okra Abelmoschus esculentus | VegetableAnnual | Heat lover; pick pods young and often. |
| Southern pea Vigna unguiculata | VegetableAnnual | Drought tolerant; doubles as a summer cover crop. |
| Collards Brassica oleracea | Vegetable | Autumn–winter crop; nematode rotation. |
| Citrus Citrus | FruitTree | Florida commercial crop; freeze protection. |
| Rabbit-eye blueberry Vaccinium | BerryNative | Heat-adapted; acid soil. |
| Muscadine grape Vitis rotundifolia | VineFruitNative | Humid-climate grape; trellis. |
| Pecan Carya illinoinensis | NutTreeNative | Large; needs deep soil and zinc. |
| St. Augustinegrass Stenotaphrum secundatum | Turf | Shade and salt tolerant; chinch bug. |
| Zoysia Zoysia | Turf | Dense, wear-tolerant warm-season lawn. |
| Bermudagrass Cynodon dactylon | Turf | Full sun; sports turf. |
| Bahiagrass Paspalum notatum | Turf | Low-input, coarse lawn for poor sandy soil. |
| Switchgrass Panicum virgatum | GrassNative | Warm-season; rain garden. |
| American holly Ilex opaca | TreeNative | Evergreen; berries on females. |
The eight disciplines here
| Discipline | What it looks like here | Taxa | Read |
|---|---|---|---|
| Garden Design 01 | Palette and practice for garden design in this climate. | 20 | Discipline guide |
| Floriculture 02 | Palette and practice for floriculture in this climate. | 10 | Discipline guide |
| Vegetables & Herbs 03 | Two seasons: spring before the heat, autumn after it | 5 | Field guide |
| Fruit & Viticulture 04 | Palette and practice for fruit & viticulture in this climate. | 4 | Discipline guide |
| Arboriculture 05 | Palette and practice for arboriculture in this climate. | 10 | Discipline guide |
| Turfgrass 06 | St. Augustine, zoysia and the hurricane lawn | 4 | Field guide |
| Nursery & Propagation 07 | Palette and practice for nursery & propagation in this climate. | 17 | Discipline guide |
| Water-wise & Restoration 08 | Palette and practice for water-wise & restoration in this climate. | 18 | Discipline guide |
Professional bodies and standards
American Society for Horticultural Science (ASHS) · University of Florida IFAS Extension · International Society of Arboriculture (ISA)
Design idiom
Southern formal garden, veranda, live oak.
Sources
Other regions
Tropical Latin America · Andes & South America · Africa · Middle East · all 16 regions