When to plant in Union City, NJ
USDA Zone 7bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Union City, New Jersey — all computed from Union City's nearest NOAA weather station.
Zone 7b means many perennials and even some tender shrubs overwinter in Union City, while your frost dates still decide when annuals go out.
Frost probability
NEW YORK CNTRL PK TWR · 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 Union City’s own odds, recorded at NEW YORK CNTRL PK TWR.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 20 | Apr 7 | Mar 26 | Oct 27 | Nov 8 | Nov 23 |
| 32°F | Apr 9 | Mar 30 | Mar 14 | Nov 6 | Nov 20 | Dec 6 |
| 28°F | Apr 2 | Mar 19 | Mar 5 | Nov 15 | Dec 1 | Dec 16 |
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 Union City, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 10 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.
Union City planting FAQ
When is the last spring frost in Union City, NJ?
On average, the last spring frost in Union City is around March 30 (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 Union City, NJ?
In Union City, the first 32°F freeze of fall lands around November 20 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Union City in?
Union City is in USDA hardiness zone 7b. In zone 7b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Union City?
There are roughly 235 frost-free days in Union City (a long growing season), running from the average last frost around March 30 to the first fall frost near November 20.
When should I plant tomatoes in Union City?
In Union City, start tomato seeds indoors around February 2–February 16, then transplant seedlings outdoors around April 6 once the danger of frost has passed.
Never miss a window in Union City
An email when it’s time to start seeds, transplant, and sow — timed to Union City’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Hoboken · 2 km
- West New York · 3 km
- Secaucus · 3 km
- Guttenberg · 4 km
- Fairview · 6 km
- Jersey City · 7 km
- East Rutherford · 7 km
- Cliffside Park · 7 km
Frost dates recorded at NEW YORK CNTRL PK TWR, 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 Union City, NJ — Frost Dates & Zone 7b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00094728. Retrieved from https://blissgarden.com/new-jersey/union-city.