When to plant in Mack, OH
USDA Zone 6bMack, Ohio frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 6b, Mack gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
CHEVIOT 3 W · 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 Mack’s own odds, recorded at CHEVIOT 3 W.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 14 | Apr 28 | Apr 13 | Oct 4 | Oct 17 | Oct 29 |
| 32°F | May 3 | Apr 16 | Apr 2 | Oct 14 | Oct 28 | Nov 9 |
| 28°F | Apr 21 | Apr 4 | Mar 20 | Oct 26 | Nov 7 | Nov 24 |
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 Mack, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 5 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.
Mack planting FAQ
When is the last spring frost in Mack, OH?
Plan for the last spring frost in Mack around April 16 (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 Mack, OH?
In Mack, the first 32°F freeze of fall lands around October 28 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Mack in?
Mack 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 Mack?
Mack has about 195 frost-free days — a moderate growing season — between the average last spring frost (April 16) and first fall frost (October 28).
When should I plant tomatoes in Mack?
For Mack, sow tomatoes indoors about February 19–March 5 and move the seedlings out around April 23, after the last spring frost.
Never miss a window in Mack
An email when it’s time to start seeds, transplant, and sow — timed to Mack’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Bridgetown · 4 km
- Dent · 5 km
- Francisville · 6 km
- Monfort Heights · 7 km
- White Oak · 9 km
- Northbrook · 14 km
- Erlanger · 14 km
- Burlington · 15 km
Frost dates recorded at CHEVIOT 3 W, 0 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 Mack, OH — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00331516. Retrieved from https://blissgarden.com/ohio/mack.