Louisiana planting calendar
When to plant summer squash in Louisiana — sow, transplant & harvest dates
Louisiana is mostly USDA zone 9a (range 8a-9b). Dates below are derived from summer squash's frost tolerance and Louisiana's frost window — not generic national averages.
Summer squash planting timetable for Louisiana
| Stage | When in Louisiana | Anchor |
|---|---|---|
| Start seeds indoors (spring crop) | late February (February 22) | 3 weeks before the last frost (mid-March) |
| Transplant outside (spring crop) | late March (March 29) | 14 days after the last frost (mid-March) |
| Spring-crop harvest | late May onward, before peak summer heat | 55-day crop — finishes before mid-summer |
| Plant the fall crop | late August (August 27) — once the worst heat breaks | ~80 days before the first fall frost (mid-November) |
| Fall-crop harvest | late October into early winter | 55-day crop — often the more productive of the two |
Dates are state-wide averages for the dominant zone. Local microclimates — elevation, urban heat, coastal moderation — can shift the window by 1-2 weeks. Use the frost-date calculator for a date tuned to your town.
Why Louisiana's climate shifts the summer squash dates
Louisiana's long hot summer shuts down fruit set, so locals run two short crops — a spring planting and a fall planting — around a deliberate mid-summer pause, instead of one long northern-style season. Louisiana is hot, humid, and subtropical with a very long season. Drainage, heat, and humidity drive plant choice far more than cold.
Summer squash (zucchini, yellow crookneck, pattypan) wants the same warm soil as cucumbers — 18 °C minimum at sowing depth. A single plant can outproduce a small family once it gets going, so don't over-plant.
Frost-risk note
A light frost in the northern parishes near Shreveport (zone 8a) can clip an early spring planting; the bigger risk is mid-summer heat sterilising flowers.
Regional variation within Louisiana
the Gulf Coast and New Orleans (zone 9b) can start the spring crop weeks earlier and may garden almost year-round; the northern parishes near Shreveport (zone 8a) runs a shorter, more northern-style single season.
- New Orleans — USDA zone 9b
- Baton Rouge — USDA zone 9a
- Shreveport — USDA zone 8b
- Lafayette — USDA zone 9a
What else to plant in Louisiana around then
Pair the spring slot with other heat-lovers (peppers, squash, beans); use the cool October–February window for greens and brassicas.
Quick-grow guide
- Sun: Full sun — 6-8 hours direct.
- Soil temperature for germination: 21-29 °C (70-85 °F).
- Spacing: 24-36 inches (60-90 cm) between plants.
- Days to harvest: ~55 days from planting out.
Frequently asked questions
When is the best time to plant summer squash in Louisiana?
In Louisiana (mostly USDA zone 9a), sow summer squash indoors around late February, set the spring crop out late March, harvest before peak summer heat, then plant a second crop late August for an autumn harvest. Avoid mid-summer. Summer squash are frost-tender — a single light frost kills seedlings, so they only go outside once frost danger has fully passed and the soil is warm.
What USDA zone is Louisiana?
Most of Louisiana sits in USDA hardiness zone 9a, with the state spanning roughly 8a-9b from the northern parishes near Shreveport (zone 8a) to the Gulf Coast and New Orleans (zone 9b). The last spring frost averages mid-March and the first fall frost mid-November.
Can you grow summer squash in Louisiana?
Yes. Louisiana's dominant zone 9a supports summer squash — the key is timing. Summer squash are frost-tender — a single light frost kills seedlings, so they only go outside once frost danger has fully passed and the soil is warm.
Does the planting date change across Louisiana?
the Gulf Coast and New Orleans (zone 9b) can start the spring crop weeks earlier and may garden almost year-round; the northern parishes near Shreveport (zone 8a) runs a shorter, more northern-style single season.
What else can I plant in Louisiana around the same time?
Pair the spring slot with other heat-lovers (peppers, squash, beans); use the cool October–February window for greens and brassicas.
Source and methodology
State zone spans from the USDA Plant Hardiness Zone Map (2023); frost-date averages from NOAA Climate Data Online. Hot-state two-season timing cross-checked against the UF/IFAS Florida Gardening Calendar and the University of Arizona Cooperative Extension planting calendar. Curated by the Growli editorial team.
Keep going
- How to grow summer squash — full guide
- USDA zone 9 — frost dates and what else to plant
- Average frost dates by zone
- Frost-date calculator
- Month-by-month planting calendar
- When to plant summer squash in every US state
Same crop, nearby states (Southeast)
- When to plant summer squash in Alabama
- When to plant summer squash in Arkansas
- When to plant summer squash in Florida
- When to plant summer squash in Georgia
- When to plant summer squash in Kentucky
- When to plant summer squash in Mississippi
- When to plant summer squash in North Carolina
- When to plant summer squash in South Carolina