When to plant in Plattsburgh, NY
USDA Zone 5aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Plattsburgh, New York — all computed from Plattsburgh's nearest NOAA weather station.
In zone 5a, Plattsburgh gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
PLATTSBURGH INTL AP · 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 Plattsburgh’s own odds, recorded at PLATTSBURGH INTL AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Jun 3 | May 19 | May 5 | Sep 13 | Sep 24 | Oct 7 |
| 32°F | May 19 | May 6 | Apr 24 | Sep 23 | Oct 5 | Oct 22 |
| 28°F | May 8 | Apr 25 | Apr 12 | Oct 3 | Oct 19 | Nov 3 |
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 Plattsburgh, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 17 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.
Plattsburgh planting FAQ
When is the last spring frost in Plattsburgh, NY?
Plan for the last spring frost in Plattsburgh around May 6 (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 Plattsburgh, NY?
Expect Plattsburgh's first fall frost near October 5 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Plattsburgh in?
Plattsburgh is in USDA hardiness zone 5a. In zone 5a, winters are cold — pick cold-hardy varieties and protect tender crops.
How long is the growing season in Plattsburgh?
Plattsburgh has about 152 frost-free days — a moderate growing season — between the average last spring frost (May 6) and first fall frost (October 5).
When should I plant tomatoes in Plattsburgh?
For Plattsburgh, sow tomatoes indoors about March 11–March 25 and move the seedlings out around May 13, after the last spring frost.
Never miss a window in Plattsburgh
An email when it’s time to start seeds, transplant, and sow — timed to Plattsburgh’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Burlington · 28 km
- Essex Junction · 35 km
- South Burlington · 36 km
- Massena · 116 km
- Rutland · 126 km
- Lebanon · 152 km
- Glens Falls · 154 km
- West Glens Falls · 155 km
Frost dates recorded at PLATTSBURGH INTL AP, 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 Plattsburgh, NY — Frost Dates & Zone 5a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00064776. Retrieved from https://blissgarden.com/new-york/plattsburgh.