Ossining, NY planting zone & frost dates
Ossining is in USDA hardiness zone 7a. The last spring frost usually comes around April 25 and the first fall frost around October 19, for a growing season of about 174 days.
Planting calendar for Ossining
Dates are counted from the average last spring frost (April 25) 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 28 – Mar 14 Transplant outdoors: May 2 – May 9 |
| Peppers | Start seeds indoors: Feb 14 – Feb 28 Transplant outdoors: May 9 – May 16 |
| Eggplant | Start seeds indoors: Feb 14 – Feb 28 Transplant outdoors: May 9 – May 16 |
| Broccoli | Start seeds indoors: Feb 14 – Feb 28 Transplant outdoors: Mar 28 – Apr 11 |
| Cabbage | Start seeds indoors: Feb 14 – Feb 28 Transplant outdoors: Mar 28 – Apr 11 |
| Onions (sets) | Plant outdoors: Mar 28 – Apr 11 |
| Peas | Sow outdoors: Mar 14 – Mar 28 |
| Spinach | Sow outdoors: Mar 14 – Mar 28 |
| Lettuce | Sow outdoors: Mar 28 – Apr 11 |
| Carrots | Sow outdoors: Mar 28 – Apr 11 |
| Potatoes | Plant outdoors: Mar 28 – Apr 11 |
| Beans | Sow outdoors: May 2 – May 9 |
| Sweet corn | Sow outdoors: May 2 – May 9 |
| Cucumbers | Sow outdoors: May 2 – May 9 |
| Squash & zucchini | Sow outdoors: May 2 – May 9 |
| Basil | Start seeds indoors: Mar 14 – Mar 28 Transplant outdoors: May 2 – May 9 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Aug 24 (8 weeks before the average first fall frost on Oct 19).
Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Apr 13 | Apr 25 | May 8 |
| First 32°F frost in fall is before | Nov 3 | Oct 19 | Oct 4 |
How to read it: in spring there is a 10% chance of a frost after May 8, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 4. A hard freeze (28°F) usually ends around April 13.
Hardiness zone by ZIP code in Ossining
- 10562 zone 7a
Nearby cities
- Sleepy Hollow zone 7a, last frost Apr 20
- Tarrytown zone 7a, last frost Apr 20
- Haverstraw zone 7a, last frost Apr 25
- Cortlandt Manor zone 7a, last frost Apr 25
- New City zone 7a, last frost Apr 20
- Greenburgh zone 7a, last frost Apr 20
- West Haverstraw zone 7a, last frost Apr 25
- Peekskill zone 7a, last frost Apr 30
Questions
What growing zone is Ossining, NY?
Ossining 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 Ossining?
The average last spring frost (32°F) in Ossining is April 25. There is still a 10% chance of frost until May 8.
When can I plant tomatoes in Ossining?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around May 2 – May 9. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Yorktown Hts 1W, NY (USC00309670), 12.7 km (7.9 mi) from the city center, elevation 204 m, based on 26 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.