When to plant in North Royalton, OH
USDA Zone 6bEverything below — frost dates, hardiness zone, and what to plant when in North Royalton, Ohio — is derived from the closest NOAA station with complete climate normals.
In zone 6b, North Royalton gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
CLEVELAND · 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 North Royalton’s own odds, recorded at CLEVELAND.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 17 | Apr 30 | Apr 17 | Oct 7 | Oct 22 | Nov 3 |
| 32°F | May 5 | Apr 20 | Apr 4 | Oct 21 | Nov 3 | Nov 17 |
| 28°F | Apr 21 | Apr 5 | Mar 22 | Nov 1 | Nov 13 | Nov 29 |
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 North Royalton, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 27 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.
North Royalton planting FAQ
When is the last spring frost in North Royalton, OH?
North Royalton's average last spring frost falls near April 20 — 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 North Royalton, OH?
In North Royalton, the first 32°F freeze of fall lands around November 3 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is North Royalton in?
North Royalton 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 North Royalton?
North Royalton has about 197 frost-free days — a moderate growing season — between the average last spring frost (April 20) and first fall frost (November 3).
When should I plant tomatoes in North Royalton?
For North Royalton, sow tomatoes indoors about February 23–March 9 and move the seedlings out around April 27, after the last spring frost.
Never miss a window in North Royalton
An email when it’s time to start seeds, transplant, and sow — timed to North Royalton’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Broadview Heights · 6 km
- Strongsville · 7 km
- Parma Heights · 8 km
- Parma · 8 km
- Middleburg Heights · 8 km
- Seven Hills · 9 km
- Brunswick · 10 km
- Brecksville · 11 km
Frost dates recorded at CLEVELAND, 14 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 North Royalton, OH — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00014820. Retrieved from https://blissgarden.com/ohio/north-royalton.