When to plant in Robertsville, NJ
USDA Zone 7aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Robertsville, New Jersey — all computed from Robertsville's nearest NOAA weather station.
Zone 7a means many perennials and even some tender shrubs overwinter in Robertsville, while your frost dates still decide when annuals go out.
The average last spring frost in Robertsville 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 Robertsville’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 Robertsville, 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.
Robertsville planting FAQ
When is the last spring frost in Robertsville, NJ?
On average, the last spring frost in Robertsville is around April 17 (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 Robertsville, NJ?
In Robertsville, the first 32°F freeze of fall lands around October 23 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Robertsville in?
Robertsville 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 Robertsville?
There are roughly 189 frost-free days in Robertsville (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 Robertsville?
In Robertsville, 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 Robertsville
An email when it’s time to start seeds, transplant, and sow — timed to Robertsville’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Old Bridge · 7 km
- Freehold · 9 km
- West Freehold · 12 km
- South River · 14 km
- Sayreville · 14 km
- Tinton Falls · 19 km
- Red Bank · 19 km
- Perth Amboy · 20 km
Frost dates recorded at FREEHOLD-MARLBORO, 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 Robertsville, NJ — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00283181. Retrieved from https://blissgarden.com/new-jersey/robertsville.