Hammonton, NJ planting zone & frost dates
Hammonton is in USDA hardiness zone 7a. The last spring frost usually comes around April 14 and the first fall frost around October 27, for a growing season of about 196 days.
Planting calendar for Hammonton
Dates are counted from the average last spring frost (April 14) 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: Feb 17 – Mar 3 Transplant outdoors: Apr 21 – Apr 28 |
| Peppers | Start seeds indoors: Feb 3 – Feb 17 Transplant outdoors: Apr 28 – May 5 |
| Eggplant | Start seeds indoors: Feb 3 – Feb 17 Transplant outdoors: Apr 28 – May 5 |
| Broccoli | Start seeds indoors: Feb 3 – Feb 17 Transplant outdoors: Mar 17 – Mar 31 |
| Cabbage | Start seeds indoors: Feb 3 – Feb 17 Transplant outdoors: Mar 17 – Mar 31 |
| Onions (sets) | Plant outdoors: Mar 17 – Mar 31 |
| Peas | Sow outdoors: Mar 3 – Mar 17 |
| Spinach | Sow outdoors: Mar 3 – Mar 17 |
| Lettuce | Sow outdoors: Mar 17 – Mar 31 |
| Carrots | Sow outdoors: Mar 17 – Mar 31 |
| Potatoes | Plant outdoors: Mar 17 – Mar 31 |
| Beans | Sow outdoors: Apr 21 – Apr 28 |
| Sweet corn | Sow outdoors: Apr 21 – Apr 28 |
| Cucumbers | Sow outdoors: Apr 21 – Apr 28 |
| Squash & zucchini | Sow outdoors: Apr 21 – Apr 28 |
| Basil | Start seeds indoors: Mar 3 – Mar 17 Transplant outdoors: Apr 21 – Apr 28 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 1 (8 weeks before the average first fall frost on Oct 27).
Useful for zone 7a gardens
- Seed starting kit with dome — to start seeds indoors before the last frost
- LED grow light for seedlings — stops leggy seedlings
- Frost cloth / plant covers — for late spring and early fall frosts
- Soil thermometer — warm-season crops need soil above 60°F
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Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Apr 1 | Apr 14 | Apr 27 |
| First 32°F frost in fall is before | Nov 8 | Oct 27 | Oct 13 |
How to read it: in spring there is a 10% chance of a frost after April 27, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 13. A hard freeze (28°F) usually ends around April 2.
Hardiness zone by ZIP code in Hammonton
- 08037 zone 7a
Nearby cities
- Jackson zone 7a, last frost Apr 28
- Atco zone 7a, last frost Apr 28
- Sicklerville zone 7a, last frost Apr 8
- Williamstown zone 7a, last frost Apr 8
- Pine Hill zone 7b, last frost Apr 8
- Vineland zone 7a, last frost Apr 11
- Lindenwold zone 7b, last frost Apr 8
- Marlton zone 7b, last frost Apr 12
Questions
What growing zone is Hammonton, NJ?
Hammonton is in USDA Plant Hardiness Zone 7a (average extreme winter low 0°F to 5°F), according to the USDA 2023 map.
When is the last frost in Hammonton?
The average last spring frost (32°F) in Hammonton is April 14. There is still a 10% chance of frost until April 27.
When can I plant tomatoes in Hammonton?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Apr 21 – Apr 28. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Hammonton 1 Ne, NJ (USC00283662), 0.9 km (0.6 mi) from the city center, elevation 38 m, based on 18 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.