Hammond, LA planting zone & frost dates
Hammond is in USDA hardiness zone 9a. The last spring frost usually comes around March 8 and the first fall frost around November 19, for a growing season of about 257 days.
Planting calendar for Hammond
Dates are counted from the average last spring frost (March 8) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.
| Crop | When |
|---|---|
| Tomatoes | Start seeds indoors: Jan 11 – Jan 25 Transplant outdoors: Mar 15 – Mar 22 |
| Peppers | Start seeds indoors: Dec 28 – Jan 11 Transplant outdoors: Mar 22 – Mar 29 |
| Eggplant | Start seeds indoors: Dec 28 – Jan 11 Transplant outdoors: Mar 22 – Mar 29 |
| Broccoli | Start seeds indoors: Dec 28 – Jan 11 Transplant outdoors: Feb 8 – Feb 22 |
| Cabbage | Start seeds indoors: Dec 28 – Jan 11 Transplant outdoors: Feb 8 – Feb 22 |
| Onions (sets) | Plant outdoors: Feb 8 – Feb 22 |
| Peas | Sow outdoors: Jan 25 – Feb 8 |
| Spinach | Sow outdoors: Jan 25 – Feb 8 |
| Lettuce | Sow outdoors: Feb 8 – Feb 22 |
| Carrots | Sow outdoors: Feb 8 – Feb 22 |
| Potatoes | Plant outdoors: Feb 8 – Feb 22 |
| Beans | Sow outdoors: Mar 15 – Mar 22 |
| Sweet corn | Sow outdoors: Mar 15 – Mar 22 |
| Cucumbers | Sow outdoors: Mar 15 – Mar 22 |
| Squash & zucchini | Sow outdoors: Mar 15 – Mar 22 |
| Basil | Start seeds indoors: Jan 25 – Feb 8 Transplant outdoors: Mar 15 – Mar 22 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 24 (8 weeks before the average first fall frost on Nov 19).
Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Feb 12 | Mar 8 | Mar 31 |
| First 32°F frost in fall is before | Dec 8 | Nov 19 | Nov 3 |
How to read it: in spring there is a 10% chance of a frost after March 31, so that is a safe date for tender plants. In fall there is a 10% chance of frost before November 3. A hard freeze (28°F) usually ends around February 21.
Hardiness zone by ZIP code in Hammond
- 70401 zone 9a
- 70402 zone 9a
- 70403 zone 9a
- 70404 zone 9a
Nearby cities
- Mandeville zone 9a, last frost Mar 12
- Laplace zone 9b, last frost Feb 9
- Denham Springs zone 9a, last frost Feb 25
- Gonzales zone 9a, last frost Feb 9
- Prairieville zone 9a, last frost Feb 9
- Shenandoah zone 9a, last frost Feb 28
- Kenner zone 9b, last frost Jan 30
- Destrehan zone 9b, last frost Jan 30
Questions
What growing zone is Hammond, LA?
Hammond is in USDA Plant Hardiness Zone 9a (average extreme winter low 20°F to 25°F), according to the USDA 2023 map.
When is the last frost in Hammond?
The average last spring frost (32°F) in Hammond is March 8. There is still a 10% chance of frost until March 31.
When can I plant tomatoes in Hammond?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Mar 15 – Mar 22. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Hammond 5 E, LA (USC00164030), 8.2 km (5.1 mi) from the city center, elevation 11 m, based on 21 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.