When to plant in Hammond, LA
USDA Zone 9aEverything below — frost dates, hardiness zone, and what to plant when in Hammond, Louisiana — is derived from the closest NOAA station with complete climate normals.
A generous ~256-day season lets Hammond gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. In zone 9a, frost is a minor factor for Hammond — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
HAMMOND 5 E · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Hammond’s own odds, recorded at HAMMOND 5 E.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 16 | Mar 25 | Mar 1 | Oct 23 | Nov 6 | Nov 26 |
| 32°F | Mar 31 | Mar 8 | Feb 12 | Nov 3 | Nov 19 | Dec 8 |
| 28°F | Mar 17 | Feb 21 | Jan 20 | Nov 14 | Dec 2 | Jan 3 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Hammond, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 33 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Hammond planting FAQ
When is the last spring frost in Hammond, LA?
Plan for the last spring frost in Hammond around March 8 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Hammond, LA?
In Hammond, the first 32°F freeze of fall lands around November 19 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Hammond in?
Hammond is in USDA hardiness zone 9a. In zone 9a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Hammond?
Hammond has about 256 frost-free days — a long growing season — between the average last spring frost (March 8) and first fall frost (November 19).
When should I plant tomatoes in Hammond?
For Hammond, sow tomatoes indoors about January 11–January 25 and move the seedlings out around March 15, after the last spring frost.
Never miss a window in Hammond
An email when it’s time to start seeds, transplant, and sow — timed to Hammond’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Covington · 33 km
- Mandeville · 37 km
- Laplace · 48 km
- Prairieville · 53 km
- Gonzales · 55 km
- Central · 56 km
- Kenner · 58 km
- Destrehan · 60 km
Frost dates recorded at HAMMOND 5 E, 8 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Hammond, LA — Frost Dates & Zone 9a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00164030. Retrieved from https://blissgarden.com/louisiana/hammond.