When to plant in Hillsdale, NJ
USDA Zone 7aHillsdale, New Jersey frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
These dates come from a station roughly 18 km away, the closest with full normals; terrain around Hillsdale (elevation, water, pavement) can move your real frost dates a few days either way. In zone 7a, Hillsdale supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
TETERBORO AP · 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 Hillsdale’s own odds, recorded at TETERBORO AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 2 | Apr 16 | Apr 3 | Oct 10 | Oct 24 | Nov 6 |
| 32°F | Apr 16 | Apr 3 | Mar 20 | Oct 21 | Nov 4 | Nov 20 |
| 28°F | Apr 4 | Mar 23 | Mar 7 | Nov 2 | Nov 16 | Dec 4 |
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 Hillsdale, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 20 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.
Hillsdale planting FAQ
When is the last spring frost in Hillsdale, NJ?
Hillsdale's average last spring frost falls near April 3 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Hillsdale, NJ?
The first fall frost in Hillsdale typically arrives around November 4 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Hillsdale in?
Hillsdale 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 Hillsdale?
Hillsdale has about 215 frost-free days — a long growing season — between the average last spring frost (April 3) and first fall frost (November 4).
When should I plant tomatoes in Hillsdale?
For Hillsdale, sow tomatoes indoors about February 6–February 20 and move the seedlings out around April 10, after the last spring frost.
Never miss a window in Hillsdale
An email when it’s time to start seeds, transplant, and sow — timed to Hillsdale’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Westwood · 2 km
- Ridgewood · 6 km
- Waldwick · 7 km
- Pearl River · 7 km
- Paramus · 7 km
- Dumont · 8 km
- New Milford · 8 km
- Glen Rock · 9 km
Frost dates recorded at TETERBORO AP, 18 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 Hillsdale, NJ — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00094741. Retrieved from https://blissgarden.com/new-jersey/hillsdale.