Jefferson Valley-Yorktown, NY planting zone & frost dates
Jefferson Valley-Yorktown is in USDA hardiness zone 6b. The last spring frost usually comes around April 30 and the first fall frost around October 17, for a growing season of about 172 days.
Planting calendar for Jefferson Valley-Yorktown
Dates are counted from the average last spring frost (April 30) 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: Mar 5 – Mar 19 Transplant outdoors: May 7 – May 14 |
| Peppers | Start seeds indoors: Feb 19 – Mar 5 Transplant outdoors: May 14 – May 21 |
| Eggplant | Start seeds indoors: Feb 19 – Mar 5 Transplant outdoors: May 14 – May 21 |
| Broccoli | Start seeds indoors: Feb 19 – Mar 5 Transplant outdoors: Apr 2 – Apr 16 |
| Cabbage | Start seeds indoors: Feb 19 – Mar 5 Transplant outdoors: Apr 2 – Apr 16 |
| Onions (sets) | Plant outdoors: Apr 2 – Apr 16 |
| Peas | Sow outdoors: Mar 19 – Apr 2 |
| Spinach | Sow outdoors: Mar 19 – Apr 2 |
| Lettuce | Sow outdoors: Apr 2 – Apr 16 |
| Carrots | Sow outdoors: Apr 2 – Apr 16 |
| Potatoes | Plant outdoors: Apr 2 – Apr 16 |
| Beans | Sow outdoors: May 7 – May 14 |
| Sweet corn | Sow outdoors: May 7 – May 14 |
| Cucumbers | Sow outdoors: May 7 – May 14 |
| Squash & zucchini | Sow outdoors: May 7 – May 14 |
| Basil | Start seeds indoors: Mar 19 – Apr 2 Transplant outdoors: May 7 – May 14 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Aug 22 (8 weeks before the average first fall frost on Oct 17).
Useful for zone 6b 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
- Cold frame / mini greenhouse — adds weeks to a short season
As an Amazon Associate, FrostZoneMap earns from qualifying purchases, at no extra cost to you.
Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Apr 16 | Apr 30 | May 13 |
| First 32°F frost in fall is before | Nov 3 | Oct 17 | Oct 4 |
How to read it: in spring there is a 10% chance of a frost after May 13, 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 17.
Nearby cities
- Cortlandt Manor zone 7a, last frost Apr 25
- Peekskill zone 7a, last frost Apr 30
- Mount Kisco zone 7a, last frost Apr 25
- Ossining zone 7a, last frost Apr 25
- Haverstraw zone 7a, last frost Apr 25
- Stony Point zone 7a, last frost Apr 25
- North Castle zone 7a, last frost Apr 12
- West Haverstraw zone 7a, last frost Apr 25
Questions
What growing zone is Jefferson Valley-Yorktown, NY?
Jefferson Valley-Yorktown is in USDA Plant Hardiness Zone 6b (average extreme winter low -5°F to 0°F), according to the USDA 2023 map.
When is the last frost in Jefferson Valley-Yorktown?
The average last spring frost (32°F) in Jefferson Valley-Yorktown is April 30. There is still a 10% chance of frost until May 13.
When can I plant tomatoes in Jefferson Valley-Yorktown?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around May 7 – May 14. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Shrub Oak, NY (USC00307742), 3.4 km (2.1 mi) from the city center, elevation 141 m, based on 4 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.