When to plant in Suffern, NY
USDA Zone 7aEverything below — frost dates, hardiness zone, and what to plant when in Suffern, New York — is derived from the closest NOAA station with complete climate normals.
In zone 7a, Suffern supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
WANAQUE RAYMOND DAM · 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 Suffern’s own odds, recorded at WANAQUE RAYMOND DAM.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 16 | Apr 30 | Apr 18 | Oct 3 | Oct 13 | Oct 27 |
| 32°F | May 3 | Apr 19 | Apr 5 | Oct 9 | Oct 23 | Nov 6 |
| 28°F | Apr 19 | Apr 4 | Mar 21 | Oct 16 | Nov 4 | Nov 21 |
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 Suffern, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 26 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.
Suffern planting FAQ
When is the last spring frost in Suffern, NY?
On average, the last spring frost in Suffern is around April 19 (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 Suffern, NY?
Expect Suffern's first fall frost near October 23 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Suffern in?
Suffern 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 Suffern?
Suffern has about 187 frost-free days — a moderate growing season — between the average last spring frost (April 19) and first fall frost (October 23).
When should I plant tomatoes in Suffern?
For Suffern, sow tomatoes indoors about February 22–March 8 and move the seedlings out around April 26, after the last spring frost.
Never miss a window in Suffern
An email when it’s time to start seeds, transplant, and sow — timed to Suffern’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Airmont · 4 km
- Monsey · 5 km
- Ramsey · 6 km
- Spring Valley · 8 km
- Chestnut Ridge · 8 km
- Nanuet · 11 km
- Ringwood · 11 km
- Waldwick · 11 km
Frost dates recorded at WANAQUE RAYMOND DAM, 15 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 Suffern, NY — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00289187. Retrieved from https://blissgarden.com/new-york/suffern.