When to plant in Florham Park, NJ
USDA Zone 7aFlorham Park, New Jersey frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 7a, Florham Park supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
The average first fall frost in Florham Park is now 13 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
CANOE BROOK · 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 Florham Park’s own odds, recorded at CANOE BROOK.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 17 | Apr 30 | Apr 17 | Oct 2 | Oct 15 | Oct 31 |
| 32°F | May 6 | Apr 18 | Apr 3 | Oct 11 | Oct 27 | Nov 10 |
| 28°F | Apr 19 | Apr 3 | Mar 19 | Oct 22 | Nov 6 | Nov 22 |
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 Florham Park, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 13 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.
Florham Park planting FAQ
When is the last spring frost in Florham Park, NJ?
Plan for the last spring frost in Florham Park around April 18 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Florham Park, NJ?
The first fall frost in Florham Park typically arrives around October 27 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Florham Park in?
Florham Park 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 Florham Park?
Florham Park has about 192 frost-free days — a moderate growing season — between the average last spring frost (April 18) and first fall frost (October 27).
When should I plant tomatoes in Florham Park?
For Florham Park, sow tomatoes indoors about February 21–March 7 and move the seedlings out around April 25, after the last spring frost.
Never miss a window in Florham Park
An email when it’s time to start seeds, transplant, and sow — timed to Florham Park’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Madison · 3 km
- Short Hills · 7 km
- Summit · 7 km
- Morristown · 7 km
- New Providence · 9 km
- Parsippany · 10 km
- Lake Hiawatha · 12 km
- Westfield · 14 km
Frost dates recorded at CANOE BROOK, 5 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 Florham Park, NJ — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00281335. Retrieved from https://blissgarden.com/new-jersey/florham-park.