When to plant in Ossining, NY
USDA Zone 7aEverything below — frost dates, hardiness zone, and what to plant when in Ossining, New York — is derived from the closest NOAA station with complete climate normals.
Zone 7a means many perennials and even some tender shrubs overwinter in Ossining, while your frost dates still decide when annuals go out.
The average last spring frost in Ossining is now 9 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
YORKTOWN HTS 1W · 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 Ossining’s own odds, recorded at YORKTOWN HTS 1W.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 21 | May 7 | Apr 25 | Sep 26 | Oct 7 | Oct 22 |
| 32°F | May 8 | Apr 25 | Apr 13 | Oct 4 | Oct 19 | Nov 3 |
| 28°F | Apr 26 | Apr 13 | Apr 3 | Oct 15 | Nov 1 | Nov 14 |
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 Ossining, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 17 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.
Ossining planting FAQ
When is the last spring frost in Ossining, NY?
On average, the last spring frost in Ossining is around April 25 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Ossining, NY?
The first fall frost in Ossining typically arrives around October 19 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Ossining in?
Ossining is in USDA hardiness zone 7a. In zone 7a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Ossining?
There are roughly 177 frost-free days in Ossining (a moderate growing season), running from the average last frost around April 25 to the first fall frost near October 19.
When should I plant tomatoes in Ossining?
In Ossining, start tomato seeds indoors around February 28–March 14, then transplant seedlings outdoors around May 2 once the danger of frost has passed.
Never miss a window in Ossining
An email when it’s time to start seeds, transplant, and sow — timed to Ossining’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Sleepy Hollow · 6 km
- Haverstraw · 7 km
- Tarrytown · 10 km
- New City · 10 km
- West Haverstraw · 11 km
- Mount Kisco · 13 km
- Stony Point · 14 km
- Nanuet · 14 km
Frost dates recorded at YORKTOWN HTS 1W, 14 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 Ossining, NY — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00309670. Retrieved from https://blissgarden.com/new-york/ossining.