When to plant in Newcastle, OK
USDA Zone 7bNewcastle, Oklahoma frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 7b, Newcastle supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
NORMAN 2NW MESONET · 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 Newcastle’s own odds, recorded at NORMAN 2NW MESONET.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 28 | Apr 12 | Mar 27 | Oct 12 | Oct 27 | Nov 9 |
| 32°F | Apr 17 | Mar 31 | Mar 12 | Oct 21 | Nov 5 | Nov 19 |
| 28°F | Apr 4 | Mar 16 | Feb 28 | Oct 30 | Nov 14 | Dec 2 |
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 Newcastle, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 16 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.
Newcastle planting FAQ
When is the last spring frost in Newcastle, OK?
Newcastle's average last spring frost falls near March 31 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Newcastle, OK?
Expect Newcastle's first fall frost near November 5 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Newcastle in?
Newcastle 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 Newcastle?
Newcastle has about 219 frost-free days — a long growing season — between the average last spring frost (March 31) and first fall frost (November 5).
When should I plant tomatoes in Newcastle?
For Newcastle, sow tomatoes indoors about February 3–February 17 and move the seedlings out around April 7, after the last spring frost.
Never miss a window in Newcastle
An email when it’s time to start seeds, transplant, and sow — timed to Newcastle’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Moore · 15 km
- Mustang · 20 km
- Norman · 23 km
- Oklahoma City · 26 km
- Del City · 27 km
- Bethany · 30 km
- Midwest City · 31 km
- Warr Acres · 32 km
Frost dates recorded at NORMAN 2NW MESONET, 12 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 Newcastle, OK — Frost Dates & Zone 7b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00346382. Retrieved from https://blissgarden.com/oklahoma/newcastle.