When to plant in Parsippany, NJ
USDA Zone 7aEverything below — frost dates, hardiness zone, and what to plant when in Parsippany, New Jersey — is derived from the closest NOAA station with complete climate normals.
Zone 7a means many perennials and even some tender shrubs overwinter in Parsippany, while your frost dates still decide when annuals go out.
The average first fall frost in Parsippany is now 6 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
BOONTON 1 SE · 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 Parsippany’s own odds, recorded at BOONTON 1 SE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 18 | May 1 | Apr 17 | Oct 1 | Oct 12 | Oct 29 |
| 32°F | May 5 | Apr 17 | Apr 4 | Oct 8 | Oct 23 | Nov 6 |
| 28°F | Apr 18 | Apr 4 | Mar 21 | Oct 19 | Nov 2 | Nov 17 |
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 Parsippany, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 11 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.
Parsippany planting FAQ
When is the last spring frost in Parsippany, NJ?
Plan for the last spring frost in Parsippany 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 Parsippany, NJ?
Expect Parsippany'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 Parsippany in?
Parsippany 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 Parsippany?
There are roughly 189 frost-free days in Parsippany (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 Parsippany?
In Parsippany, 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 Parsippany
An email when it’s time to start seeds, transplant, and sow — timed to Parsippany’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Lake Hiawatha · 3 km
- Morristown · 9 km
- Florham Park · 10 km
- Lincoln Park · 11 km
- Madison · 12 km
- Dover · 13 km
- Kinnelon · 13 km
- Pompton Plains · 15 km
Frost dates recorded at BOONTON 1 SE, 3 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 Parsippany, NJ — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00280907. Retrieved from https://blissgarden.com/new-jersey/parsippany.