At a glance
- Region ID: GA-PIEDMONT
- Anchor cities: Atlanta, Charlotte, Nashville, Raleigh
- USDA Hardiness Zones: 7b–8a
- Soil: Red clay, acidic, prone to compaction
- Catalog size: 158 plants (57 Core 80 Common 21 Available)
- Common containers: 3-gallon for shrubs and perennials, 7–15 gallon or B&B for trees
Pruning & maintenance calendar
Anchored to plants we have full care profiles for. As more profiles are added, this calendar fills out. Generated from the per-plant pruning data in our public catalog.
January – Mid-February
Structural pruning of crape myrtle before bud break. Cut to lateral branches at the trunk or outward-facing buds — never top.
Late February – Mid-March
Annual Knock Out rose pruning, after forsythia bloom but before bud break. Inspect for rose rosette virus symptoms before cutting.
March
Selective thinning and shaping of American boxwood before new growth flushes. Sanitize tools between plants in any blight-confirmed area.
Late July – Early August
Post-bloom pruning of traditional bigleaf hydrangea. Cut spent flowers back to the first strong bud pair below the bloom. Reblooming cultivars (Endless Summer, BloomStruck) tolerate light spring deadwood removal.
August – October
Structural cuts on young red maple — late summer through early fall avoids the heavy sap bleed of late-winter pruning. Establish single central leader, remove co-dominant stems.
Regional pest & pathogen pressure
What's actively pressuring plants in this region right now — diagnostic notes only.
- Boxwood blight — established and pressure heavy. Tell: dark circular leaf spots, rapid defoliation working from the bottom up, black streaking on green stems.
- Rose rosette virus — confirmed and widespread throughout the region. Tell: excessive soft thorns on new canes, witch's broom of distorted shoots, reddened rubbery new growth, elongated buds that fail to open.
- Crape myrtle bark scale — established and spreading. Tell: white felt-like crusty patches on branches and trunk, black sooty mold on lower leaves.
- Cercospora leaf spot — chronic on bigleaf hydrangea in late summer; also affects crape myrtle. Tell: tan-to-brown circular spots with purple halos, progressing from lower leaves up.
- Tar spot — common on red maple late summer. Looks alarming, harmless.
- Chlorosis on alkaline-amended soils — boxwood and red maple both signal this with yellow leaves and green veins. Native red clay is acidic; pH problems usually trace to imported topsoil or over-liming.
Core staples (commonness 1)
Detailed care profiles for plants on the trade truck across this region. Pruning windows, identification-grade pest and pathogen notes, and cultural fundamentals. The list will grow as more profiles are written.
Currently: 5 of 57 core staples profiled. The remaining 153 plants in this region are tracked in the catalog data with botanical and container info pending care notes.
Crape Myrtle
Core staplePruning — late winter, before bud break
Cut back to lateral branches at the trunk or to outward-facing buds. Annual heavy topping ruins natural form, reduces bloom quality, and produces weakly attached suckers that snap in summer storms. Light deadheading after the first bloom flush can encourage a second flush. On older multi-trunk specimens, remove crossing interior branches and any suckering at the base.
Cultural notes
Full sun is non-negotiable for bloom production and disease resistance. Tolerates poor soil and drought once established. Hard freezes below 0°F damage above-ground growth in borderline areas; regrowth from the base is typical. Often planted too close to structures — even dwarf cultivars reach 6–8 ft. across at maturity. Suckering at the base is normal; remove annually for tree form.
Common pests
Pest Crape myrtle bark scale
White, felt-like crusty patches on branches and trunk, especially in branch crotches and on undersides of limbs. Black sooty mold develops on lower leaves and beneath the canopy from honeydew. Established and spreading throughout Southeast and Gulf Coast regions; first US detection 2004 in Texas.
Pest Aphids
Clusters on new growth and undersides of leaves in spring. Honeydew leads to sooty mold on leaves below. Generally cosmetic — plants outgrow damage.
Pest Japanese beetle
Skeletonized leaves in mid-summer, primarily in Mid-Atlantic and Midwest regions. Feeding tends to concentrate on the upper, sunlit canopy.
Common pathogens
Disease Powdery mildew
White powdery coating on new growth, flower buds, and stem tips, often distorting growth. Varietal resistance varies dramatically — the National Arboretum “Indian Tribes” series (Natchez, Tuscarora, Miami, Tonto, Sioux) was bred specifically for resistance. Pressure heaviest in humid summers, shaded sites, and locations with poor air circulation.
Disease Cercospora leaf spot
Irregular dark spots, often with yellow halos, progressing to broad yellowing and premature leaf drop. Typically appears mid-to-late summer. Defoliation can be dramatic by September but is rarely fatal to established trees.
American Boxwood
Core staplePruning — late winter to early spring, before new growth flushes (typically March)
Selective thinning of interior branches improves air circulation and reduces blight pressure significantly more than surface shearing alone. Sheared-only boxwoods develop a dense outer canopy with dead interior — a classic blight-favoring pattern. Light shearing in early summer after the first growth flush has hardened off. Avoid late-season pruning that pushes tender growth before winter. Sanitize tools between plants in any blight-confirmed area.
Cultural notes
Shallow-rooted — mulch matters more than for most shrubs, and cultivation around the base causes root damage. Winter desiccation in zones 5–6 produces orange-bronze foliage that greens up in spring; this is not the same as blight. Specimen plantings in open exposed sites suffer more winter damage than mass plantings. Soil pH preference is 6.5–7.2 — chlorosis in acidic Southeast soils is common and often misdiagnosed as disease.
Common pests
Pest Boxwood leafminer
Blistered, raised orange-yellow patches on leaf undersides. Mature leaves yellow and drop prematurely. Adult fly emerges in mid-spring at the same time as weigela bloom — a useful regional phenological cue.
Pest Boxwood mite
Bronzed stippling on upper leaf surfaces. Heavy infestations cause widespread bronzing and leaf drop, particularly in hot, dry, exposed sites. Often confused with winter desiccation or chlorosis.
Pest Boxwood psyllid
Cupped, distorted new growth in spring. White waxy nymphs visible inside cupped leaves. Cosmetic in most cases — plants outgrow damage.
Common pathogens
Disease Boxwood blight (Calonectria pseudonaviculata)
Dark circular leaf spots progressing to rapid defoliation, working from lower branches upward. The diagnostic tell is black streaking on green stems. Established and pressure heavy throughout the Southeast, Mid-Atlantic, and Pacific Northwest. Spreads on contaminated tools, gloves, clothing, and infected nursery stock — a quarantine-grade pathogen for any boxwood-producing nursery. NewGen series cultivars (Independence, Freedom) were bred specifically for resistance.
Disease Volutella blight
Orange-pink spore masses visible on undersides of dropped leaves and on dying twigs. Typically follows stress events: winter injury, drought, root damage, or improper pruning. Distinguishable from boxwood blight by the orange spore color and the gradual rather than rapid decline.
Disease Phytophthora root rot
Sudden chlorosis and decline in waterlogged or poorly draining sites. Roots are dark, brittle, and easily stripped from the woody core when pulled. No recovery once the root system collapses. Test soil drainage before replanting.
Bigleaf Hydrangea
Core staplePruning — immediately after bloom (late July / early August)
Traditional H. macrophylla blooms exclusively on old wood. Late-fall or early-spring pruning removes the flower buds and produces a green plant that won't bloom that year — the single most common “why didn't my hydrangea bloom?” diagnostic call. Cut spent flowers back to the first pair of strong buds below the bloom. Do not cut to the ground except across multiple seasons to renovate an aged plant. Reblooming cultivars (Endless Summer, Penny Mac, BloomStruck) bloom on both old and new wood — light removal of obviously dead wood in early spring is acceptable for these only.
Cultural notes
Bloom color in pink/blue cultivars is pH-driven — acidic soil (below pH 6) yields blue, alkaline soil (above pH 6.5) yields pink, transitional pH produces mixed colors on the same plant. White cultivars do not shift color. Mid-day wilt in full sun, even with adequate water, is normal and recovers overnight; persistent wilt indicates root stress or excessive heat. Cold-zone bloom failure is typically winter bud kill rather than pruning error — siting with afternoon shade and winter wind protection improves bud survival.
Common pests & pathogens
Pest Spider mite
Fine stippling and bronzing in hot, dry conditions, particularly in afternoon-sun siting. Fine webbing on leaf undersides at heavy infestation. Often mistaken for nutrient deficiency.
Disease Cercospora leaf spot
Circular tan-to-brown spots with purple halos, starting on lower leaves and progressing upward through the season. Cosmetic but disfiguring late in the growing season. Heavy in humid Southeast and Gulf Coast regions.
Disease Botrytis (gray mold)
Fuzzy gray-brown patches on flowers, especially in cool wet springs. Affects bloom quality and shortens bloom display; rarely affects plant health.
Red Maple
Core staplePruning — late summer or early fall (August through October)
Late-summer cuts avoid the heavy sap bleeding that follows late-winter pruning as sap rises. Bleeding is cosmetic, not harmful, but alarms clients. Young trees require structural pruning to establish a single central leader. Co-dominant leaders are the most common long-term structural failure mode in suburban Acer rubrum — branches included in tight V-crotches split in storms a decade or two later. Never flush-cut at the trunk; leave the branch collar intact.
Cultural notes
Cultivar selection drives long-term performance. October Glory and Red Sunset are the trade standards for reliable red fall color and structural form. Chlorosis (yellow leaves with green veins) in alkaline soils is common — Acer rubrum prefers slightly acidic soil. Surface roots compete with turf at maturity; a mulched root zone solves the problem better than annual reseeding under the canopy.
Common pests & pathogens
Pest Cottony maple scale
White cottony egg masses on twigs and undersides of branches in late spring and summer. Honeydew and sooty mold follow on leaves and bark below. Most damage is cosmetic but heavy infestations stress young trees.
Disease Verticillium wilt
Sudden one-sided branch dieback and wilt in mid-summer. Diagnostic tell: vascular streaking visible when bark is peeled back on a dying branch — dark olive-green to brown discoloration in the sapwood. Soil-borne and effectively incurable. Trees may decline rapidly or persist for years with progressive limb loss.
Disease Tar spot
Large, round, raised black spots on leaves in late summer. Cosmetic only — no impact on tree health despite alarming appearance. Common in moist Midwest and Northeast regions.
Knock Out Rose
CommonPruning — late winter (after forsythia bloom, before bud break)
Cut back to roughly one-third to one-half of mature size for annual maintenance. Remove crossing canes and any canes showing rose rosette symptoms at the base, and sanitize tools between cuts on different plants. Older plants benefit from removing one or two oldest canes to ground level each year to encourage basal renewal. Mid-season tidy after the first heavy bloom flush is optional — the plant reblooms regardless.
Cultural notes
Originally marketed as “disease-resistant.” That claim was accurate for black spot at introduction in 2000; rose rosette virus has changed the practical picture entirely. Inspect plantings every two to three weeks for rosette symptoms during the growing season. Tolerates poor soil, drought, and heat once established. Full sun produces best bloom and disease resistance. Avoid interplanting with multiflora rose (the wild RRV reservoir) where possible.
Common pests & pathogens
Disease Rose rosette virus (RRV)
Diagnostic symptoms include excessive thorniness on new canes (canes covered in tiny soft thorns), witch's broom proliferation of distorted shoots, reddened or “rubbery” new growth that doesn't harden off, and elongated buds that fail to open. Spread by a microscopic eriophyid mite. Confirmed in every continental US region. There is no cure — affected plants are typically removed, including the root system, to prevent spread to neighboring roses.
Pest Japanese beetle
Heavy summer damage to foliage and blooms, particularly in Midwest and Mid-Atlantic regions. Skeletonized leaves and shredded flowers. Adults emerge in late June into July; populations cycle annually based on prior-year grub conditions in nearby turf.
Disease Black spot
Circular black spots with fringed margins on leaves, progressing to yellowing and defoliation working from the bottom of the plant up. Knock Out cultivars are moderately resistant but disease pressure overwhelms varietal resistance in humid regions and on aged plants.
Inside the app
Skip the spreadsheet. Verdant Meridian seeds your library with the regional palette on day one.
Pick your region at onboarding — the app loads the commonness-1 and commonness-2 plants for that market into your element library, ready to drop onto a measured shape and price.
Try Free — 30 DaysHow this list was built
Compiled from regional wholesale grower availability lists — not retail garden references. If the regional wholesale trade grows it, it's included. The market has already applied the run-of-the-mill filter.
Commonness rating:
- 1 — Core staple on every truck, specified constantly. The ~50 plants that are Southeast Piedmont landscaping.
- 2 — Common regularly stocked and used. Not universal.
- 3 — Available, sold in region, used selectively or by better designers.
Pruning windows, pest and pathogen identification notes are drawn from regional Cooperative Extension publications and trade horticulture references. No chemical, fungicide, or product recommendations appear anywhere in this database. Diagnostic and cultural information only — what you're looking at, and what the plant prefers. What you do about it is your license, your land, your call.
FAQ
When should crape myrtles be pruned in the Southeast Piedmont?
Late winter, January through mid-February, before bud break. Never top — known regionally as crape murder. Cut to lateral branches at the trunk or to outward-facing buds.
Is boxwood blight present in Georgia and the Carolinas?
Yes. Boxwood blight is established and pressure is heavy throughout the Southeast Piedmont. Look for dark circular leaf spots progressing to rapid defoliation working from lower branches up, with black streaking on green stems. NewGen series cultivars were bred for resistance.
Why didn't my hydrangea bloom this year?
The most common cause is late-fall or early-spring pruning. Traditional Hydrangea macrophylla blooms on old wood. Cutting it back in spring removes the flower buds. Prune immediately after bloom, typically late July or early August in this region.
Is rose rosette virus a problem for Knock Out roses in this region?
Yes. Rose rosette virus is widespread throughout the Southeast Piedmont; wholesale replacement of established Knock Out plantings is common. Look for excessive thorniness on new canes, witch's broom of distorted shoots, and reddened rubbery new growth that won't harden off.
What is the USDA hardiness zone for Atlanta, Charlotte, Nashville, and Raleigh?
These cities span USDA Hardiness Zones 7b and 8a. The Southeast Piedmont region is characterized by red clay soils, humid summers, and mild winters with intermittent hard freezes. Palms are unreliable north of I-20.
Cite this page
Verdant Meridian, “Southeast Piedmont & Mid-South Plant Palette,”
verdantmeridian.app/regions/southeast-piedmont, updated May 2026. CC-BY-4.0. Raw data: /data/plants.json.
This database is published under Creative Commons Attribution 4.0. Free to use, redistribute, and build on — attribution required.
