When to plant in Ronkonkoma, NY
USDA Zone 7bEverything below — frost dates, hardiness zone, and what to plant when in Ronkonkoma, New York — is derived from the closest NOAA station with complete climate normals.
In zone 7b, Ronkonkoma supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
ISLIP LI MACARTHUR 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 Ronkonkoma’s own odds, recorded at ISLIP LI MACARTHUR AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 7 | Apr 23 | Apr 11 | Oct 8 | Oct 21 | Nov 4 |
| 32°F | Apr 25 | Apr 10 | Mar 31 | Oct 18 | Nov 2 | Nov 15 |
| 28°F | Apr 12 | Mar 30 | Mar 14 | Nov 1 | Nov 14 | Dec 1 |
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 Ronkonkoma, 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.
Ronkonkoma planting FAQ
When is the last spring frost in Ronkonkoma, NY?
Plan for the last spring frost in Ronkonkoma around April 10 (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 Ronkonkoma, NY?
The first fall frost in Ronkonkoma typically arrives around November 2 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Ronkonkoma in?
Ronkonkoma 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 Ronkonkoma?
Ronkonkoma has about 206 frost-free days — a moderate growing season — between the average last spring frost (April 10) and first fall frost (November 2).
When should I plant tomatoes in Ronkonkoma?
For Ronkonkoma, sow tomatoes indoors about February 13–February 27 and move the seedlings out around April 17, after the last spring frost.
Never miss a window in Ronkonkoma
An email when it’s time to start seeds, transplant, and sow — timed to Ronkonkoma’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Lake Ronkonkoma · 3 km
- Holbrook · 5 km
- Nesconset · 5 km
- Lake Grove · 6 km
- Central Islip · 6 km
- Holtsville · 7 km
- Sayville · 7 km
- Hauppauge · 8 km
Frost dates recorded at ISLIP LI MACARTHUR AP, 2 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 Ronkonkoma, NY — Frost Dates & Zone 7b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00004781. Retrieved from https://blissgarden.com/new-york/ronkonkoma.