At a Glance
| Factor | Detail |
|---|---|
| USDA Zone | 9a |
| Best Planting Season | October–March (cool season) |
| Typical Lot Size | 4,800–6,500 sq ft (40×120 shotgun double; 60×90 suburban) |
| Typical Project Cost | Budget $9,000 · Mid $20,000 · Premium $44,000 |
| Annual Rainfall | 63 inches |
| Summer High | 92°F (feels-like often exceeds 105°F with humidity) |
What Makes a Backyard Different in New Orleans
New Orleans backyards sit on silty clay that drains slowly and floods fast. The high water table means you cannot dig deeper than 18–24 inches without hitting saturated soil, which rules out standard drainage trenches and most in-ground water features. Historic district design review requires approval for fences, pergolas, and even some plantings visible from the street; in suburban parishes like Jefferson and St. Tammany, HOA covenants often mandate neutral siding colors and prohibit decorative rain barrels. Your backyard receives intense afternoon sun from May through September, but the live oak canopy common to older neighborhoods creates permanent shade pockets that shift seasonally. Salt air from Lake Pontchartrain and the Gulf accelerates rust on ferrous metals and kills plants intolerant of chloride drift. Flooding risk varies by elevation certificate, but even properties outside FEMA zones experience yard pooling after two-inch rain events. You will design around water, not against it.
Design Zones: How to Divide Your Backyard
Entertainment Zone — Position hardscape dining or lounge areas on the highest grade; New Orleans’s summer dew point averages 74°F, so ceiling fans on covered structures are non-negotiable.
Planting Beds — Raise beds 12–18 inches above grade using rot-resistant edging; silty clay compacts under foot traffic and drowns roots during summer thunderstorms.
Lawn Panel — Limit turf to 30–40% of total area; St. Augustine and Zoysia survive here, but both demand weekly mowing May–October and fungicide rotation.
Utility Corridor — Screen HVAC condensers, garbage bins, and meter boxes with evergreen hedges; place this zone downwind (prevailing southeast) to keep noise away from seating areas.
Rain Garden or Bioswale — Direct downspouts and runoff into a planted depression that holds water 12–24 hours; Louisiana Iris and Canna tolerate standing water and filter sediment before it reaches storm drains.
Materials for New Orleans’s Climate
Decomposed Granite (best) — Drains fast, stays cooler than concrete, resists washout if edged properly; source local crushed shell for a lighter color that reflects heat.
Pressure-Treated Pine (good) — Ground-contact rated (.60 retention) handles moisture; expect 12–15 year lifespan before replacement; avoid direct soil contact by setting posts in gravel-filled holes.
Brick Pavers (good with caveats) — Traditional for New Orleans; lay on 4 inches of compacted limestone base with polymeric sand joints; silty clay will heave pavers within three years unless you excavate and compact aggressively.
Composite Decking (avoid) — Expands in humidity, harbors mold between boards, and becomes slick when wet; if you must use it, specify capped polymer with antimicrobial additives and space joists 12 inches on center.
Galvanized Steel Edging (avoid) — Rusts within 18 months in salt air; powder-coated aluminum or rot-resistant hardwood outlast it by a decade.
Concrete Slabs (conditional) — Pour 4 inches thick over compacted aggregate base; control joints every 8 feet; seal annually or expect surface spalling from freeze-thaw cycles and salt intrusion.
What Homeowners Get Wrong in New Orleans
Planting Azaleas in Full Sun — Azaleas dominate the city’s spring palette, but your backyard’s afternoon exposure will scorch them by June; they need morning sun and afternoon shade, ideally under a high oak canopy or on an east-facing wall.
Ignoring Elevation Certificates — You assume your backyard drains because it is not in a flood zone, then discover it holds three inches of water after every rain; order a $400 survey before you design anything permanent.
Skipping Soil Amendments — Silty clay is nearly impermeable; without mixing 3–4 inches of composted pine bark or aged manure into the top 12 inches, your plants will drown in summer and crack the surface in winter.
Using Non-Galvanized Hardware — Standard steel screws and brackets rust through in 24–36 months; specify stainless or hot-dip galvanized hardware rated for coastal exposure, especially for pergolas and arbors.
Overestimating Lawn Viability — St. Augustine requires 1.5 inches of water per week, fungicide every 28 days in summer, and survives shade poorly; many New Orleans backyards would perform better with 60% groundcover and 40% turf, but homeowners plant wall-to-wall sod out of habit.
Budget Guide for New Orleans
Budget Tier ($9,000) — Grade and mulch existing beds, install 200 sq ft of decomposed granite pathway, add a 10×12 foot pressure-treated deck with ceiling fan, plant 25 zone-appropriate perennials and shrubs, repair or replace 8 linear feet of fence.
Mid Tier ($20,000) — Raise four planting beds with cypress edging, install 400 sq ft of brick paver patio with proper base prep, build a 12×16 foot pergola with stained pine posts and polycarbonate roof panels, add drip irrigation on a smart timer, plant 50 plants including two specimen Crape Myrtles, construct a 60 sq ft rain garden with rock spillway.
Premium Tier ($44,000) — Regrade entire yard with 40 cubic yards of engineered fill, install 800 sq ft of permeable paver system, build a 16×20 foot outdoor kitchen with stainless cabinetry and ceramic tile counters, add a 300-gallon rainwater cistern with concealed underground storage, plant 100+ plants including mature Bald Cypress and Live Oak specimens, install color-changing LED landscape lighting on a zoned system, construct a custom steel and wood privacy screen that meets historic district guidelines.
Plant Palette
| Plant | Zones | Sun | Water | Height | Why here |
|---|---|---|---|---|---|
| ‘Natchez’ Crape Myrtle (Lagerstroemia indica) | 7–10 | Full | Medium | 20–30 ft | Mildew-resistant in humid air, tolerates clay, provides summer shade over seating areas |
| ‘Big Blue’ Liriope (Liriope muscari) | 6–10 | Partial / Shade | Medium | 12–15 in | Evergreen groundcover that survives root competition under oaks and handles periodic flooding |
| Louisiana Iris ‘Black Gamecock’ (Iris × louisiania) | 6–10 | Full / Partial | High | 30–36 in | Native wetland perennial perfect for rain gardens and low spots that hold water after storms |
| ‘Gulf Stream’ Nandina (Nandina domestica) | 6–9 | Full / Partial | Low | 3–4 ft | Compact evergreen shrub that screens utility areas, tolerates salt air, and resists deer |
| ‘Henry’s Garnet’ Virginia Sweetspire (Itea virginica) | 5–9 | Full / Partial | Medium / High | 3–4 ft | Fragrant June blooms, burgundy fall color, thrives in wet clay along fence lines |
| ‘Knockout’ Rose (Rosa) | 5–11 | Full | Medium | 3–4 ft | Disease-resistant repeat bloomer that handles humidity and provides color May–November |
| ‘Endless Summer’ Hydrangea (Hydrangea macrophylla) | 4–9 | Partial | High | 3–5 ft | Blooms on old and new wood, survives shade under high canopy, blue flowers in acidic soil |
| Southern Shield Fern (Thelypteris kunthii) | 7–11 | Partial / Shade | High | 2–3 ft | Native fern that tolerates wet feet and fills shaded corners under trees and along north walls |
| ‘Festiva Maxima’ Peony (Paeonia lactiflora) | 3–8 | Full / Partial | Medium | 3 ft | Requires winter chill, plant only if your microclimate dips below 40°F for 300+ hours |
| ‘Hope’ Philodendron (Philodendron selloum) | 8–11 | Partial / Shade | Medium | 4–6 ft | Tropical foliage that survives light frost, anchors shaded beds near outdoor living spaces |
| ‘Compacta’ Holly Fern (Cyrtomium falcatum) | 8–10 | Shade | Medium | 18–24 in | Evergreen fern that tolerates deep shade and poor drainage along fence lines |
| ‘Hameln’ Fountain Grass (Pennisetum alopecuroides) | 5–9 | Full | Low | 2–3 ft | Ornamental grass that adds movement to raised beds and tolerates clay if drainage improved |
| ‘Autumn Joy’ Sedum (Hylotelephium spectabile) | 3–9 | Full | Low | 18–24 in | Succulent that survives neglect, blooms September–October, perfect for hot exposed areas |
| ‘Profusion’ Canna (Canna × generalis) | 7–11 | Full / Partial | High | 3–4 ft | Bold foliage and flowers, thrives in boggy rain gardens, multiplies aggressively in clay |
| ‘Arbor Day’ Azalea (Rhododendron) | 6–9 | Partial | Medium | 4–5 ft | Evergreen azalea bred for heat tolerance, blooms April, plant only in morning sun locations |
Try it on your yard
These fifteen plants will anchor your New Orleans backyard through hurricanes, humidity, and clay soil—but the layout matters as much as the palette. See what your backyard could look like →
Frequently Asked Questions
Do I need a permit to build a deck in New Orleans?
Yes. The City of New Orleans requires a building permit for any deck over 200 square feet or elevated more than 30 inches above grade. In historic districts, you must also obtain design review approval from the Historic District Landmarks Commission before you submit your building permit application. Suburban parishes like Jefferson and St. Bernard have similar thresholds but process permits through their own offices. Expect 4–8 weeks for approval in the city, faster in the parishes.
What grass survives in New Orleans backyards?
‘Palmetto’ St. Augustine tolerates moderate shade and handles humidity better than common St. Augustine, but it still requires weekly mowing May through October and preventative fungicide applications every 28 days. ‘Zeon’ Zoysia is slower-growing and more drought-tolerant once established, but it browns earlier in winter and takes two full seasons to fill in from plugs. If your backyard has more than 50% shade from mature trees, replace turf with ‘Big Blue’ Liriope or Asiatic Jasmine groundcover.
How do I stop my backyard from flooding?
Regrade to direct water toward a rain garden or bioswale planted with Louisiana Iris, Canna, and River Birch; these species tolerate standing water for 24–48 hours and filter sediment. If regrading is not feasible, install a 12-inch French drain along the lowest edge of your property, but only if your water table is below 36 inches—anything shallower will fill the drain pipe year-round. Raise planting beds 12–18 inches and use decomposed granite or permeable pavers for pathways to reduce runoff volume.
Can I grow vegetables in New Orleans clay soil?
Yes, but only in raised beds filled with a 50/50 mix of topsoil and compost. Native silty clay drains too slowly for tomatoes, peppers, and squash, which will develop root rot during summer thunderstorms. Build beds at least 12 inches tall using rot-resistant cypress or composite lumber. Plant cool-season crops (lettuce, kale, broccoli) October through February and warm-season crops (tomatoes, okra, cucumbers) March through May; June through September is too hot and humid for most vegetables except Southern peas and sweet potatoes.
Do I need historic district approval for a fence?
If your property is in the Garden District, French Quarter, Marigny, or any of the thirteen local historic districts, yes. The HDLC requires a Certificate of Appropriateness for new fences, and they favor wood picket or wrought iron designs that match the neighborhood’s character. In Uptown and Mid-City, you can generally install a 6-foot privacy fence without review as long as it is not visible from the street. Suburban parishes regulate fence height (usually 6 feet maximum in rear yards) but rarely require design approval unless your subdivision has its own architectural covenants.
What kills plants in New Orleans besides the heat?
Salt air from the Gulf and Lake Pontchartrain drifts inland during south and southeast winds, depositing chloride on foliage and in soil; this kills plants like Japanese Maple, Boxwood, and Burning Bush that evolved in low-salinity environments. Extreme humidity (average dew point above 70°F May–September) promotes fungal diseases like powdery mildew, black spot, and root rot; avoid plants that require dry foliage and good air circulation. The high water table drowns deep-rooted species like fruit trees unless you plant them on 18-inch mounds, and freeze events every 3–5 winters kill marginally hardy tropicals like Sago Palm and Fishtail Palm.
How much does it cost to install a patio in New Orleans?
Brick pavers over a properly compacted limestone base cost $18–$24 per square foot installed, so a 300 square foot patio runs $5,400–$7,200. Decomposed granite or crushed shell costs $8–$12 per square foot for a 4-inch base with metal edging. Concrete slab patios cost $12–$16 per square foot including control joints and a broom finish, but silty clay requires aggressive base prep—add $3–$5 per square foot for excavation and compacted aggregate. Permeable pavers over an engineered base system cost $22–$28 per square foot but eliminate standing water and meet some stormwater regulations.
When should I plant trees and shrubs in New Orleans?
October through March is ideal; roots establish during the cool season while evaporation rates are low. Avoid planting April through September unless you commit to daily watering and accept 20–30% mortality from heat stress. Container-grown plants can go in year-round, but bare-root and balled-and-burlapped stock must be planted December through February. For a New Orleans native plant palette that handles summer installation stress better, consider species like Wax Myrtle, Yaupon Holly, and Southern Magnolia.
Do I need irrigation in a city that gets 63 inches of rain?
Yes. New Orleans receives 63 inches annually, but 40% of that falls May through September in intense thunderstorms that run off clay soil before roots can absorb it. You will experience 2–3 week dry spells in October and again in March when newly planted trees and shrubs need consistent moisture. Install drip irrigation on a smart timer that pauses when rain is detected; this cuts water use 40% compared to spray heads and prevents fungal disease by keeping foliage dry. Mature trees and established groundcovers survive on rainfall alone, but annual color beds and vegetables require supplemental water April through October.
What is the best privacy screen for a New Orleans backyard?
‘Needlepoint’ Holly grows 12–15 feet tall, tolerates clay and periodic flooding, and stays evergreen year-round with minimal pruning. ‘Wax Myrtle’ (Morella cerifera) is a fast-growing native that reaches 15–20 feet and attracts birds but requires annual shearing to maintain density. For a pollinator-friendly hedge, plant ‘Henry’s Garnet’ Virginia Sweetspire in a staggered double row; it tops out at 4 feet but provides fragrant blooms and fall color. Avoid Leyland Cypress and ‘Green Giant’ Arborvitae—both develop fatal canker diseases in New Orleans’s humidity and require replacement within 7–10 years.
