When to plant in Northbrook, OH
USDA Zone 6bNorthbrook, Ohio frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Zone 6b means Northbrook sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
CHEVIOT · 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 Northbrook’s own odds, recorded at CHEVIOT.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 13 | Apr 29 | Apr 14 | Oct 3 | Oct 16 | Oct 29 |
| 32°F | May 5 | Apr 17 | Apr 2 | Oct 11 | Oct 26 | Nov 7 |
| 28°F | Apr 21 | Apr 4 | Mar 20 | Oct 22 | Nov 4 | Nov 22 |
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 Northbrook, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 14 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.
Northbrook planting FAQ
When is the last spring frost in Northbrook, OH?
Northbrook's average last spring frost falls near April 17 — 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 Northbrook, OH?
Expect Northbrook's first fall frost near October 26 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Northbrook in?
Northbrook is in USDA hardiness zone 6b. In zone 6b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Northbrook?
There are roughly 192 frost-free days in Northbrook (a moderate growing season), running from the average last frost around April 17 to the first fall frost near October 26.
When should I plant tomatoes in Northbrook?
In Northbrook, 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 Northbrook
An email when it’s time to start seeds, transplant, and sow — timed to Northbrook’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- White Oak · 5 km
- Forest Park · 6 km
- Finneytown · 7 km
- Monfort Heights · 8 km
- Dent · 9 km
- Fairfield · 10 km
- Springdale · 10 km
- Bridgetown · 11 km
Frost dates recorded at CHEVIOT, 11 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 Northbrook, OH — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00331515. Retrieved from https://blissgarden.com/ohio/northbrook.