When to plant in Old Bridge, NJ
USDA Zone 7aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Old Bridge, New Jersey — all computed from Old Bridge's nearest NOAA weather station.
Zone 7a means many perennials and even some tender shrubs overwinter in Old Bridge, while your frost dates still decide when annuals go out.
The average last spring frost in Old Bridge is now 5 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
FREEHOLD-MARLBORO · 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 Old Bridge’s own odds, recorded at FREEHOLD-MARLBORO.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 18 | May 1 | Apr 16 | Oct 1 | Oct 12 | Oct 26 |
| 32°F | May 6 | Apr 17 | Apr 2 | Oct 9 | Oct 23 | Nov 7 |
| 28°F | Apr 19 | Apr 2 | Mar 19 | Oct 18 | Nov 3 | Nov 20 |
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 Old Bridge, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 24 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.
Old Bridge planting FAQ
When is the last spring frost in Old Bridge, NJ?
Plan for the last spring frost in Old Bridge around April 17 (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 Old Bridge, NJ?
Expect Old Bridge'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 Old Bridge in?
Old Bridge 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 Old Bridge?
There are roughly 189 frost-free days in Old Bridge (a moderate growing season), running from the average last frost around April 17 to the first fall frost near October 23.
When should I plant tomatoes in Old Bridge?
In Old Bridge, start tomato seeds indoors around February 20–March 6, then transplant seedlings outdoors around April 24 once the danger of frost has passed.
Never miss a window in Old Bridge
An email when it’s time to start seeds, transplant, and sow — timed to Old Bridge’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- South River · 7 km
- Robertsville · 7 km
- Sayreville · 8 km
- New Brunswick · 14 km
- Highland Park · 14 km
- Perth Amboy · 15 km
- Fords · 16 km
- Freehold · 16 km
Frost dates recorded at FREEHOLD-MARLBORO, 11 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 Old Bridge, NJ — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00283181. Retrieved from https://blissgarden.com/new-jersey/old-bridge.