Frost Dates for Mentor, OH
In Mentor, OH, the average last spring frost is around Apr 15 and the average first fall frost around Nov 9, for a growing season of about 209 days. For frost-tender plants, wait until Apr 27, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Painesville 4 Nw, OH weather station, 5 miles away, elevation 600 ft. Frost can come earlier in low spots and valleys and later near cities and large lakes.
Frost probability by date
Chance of a 32°F frost after the spring date, or before the fall date.
| Chance | Last spring frost | First fall frost |
|---|---|---|
| 10% | Apr 27 | Oct 30 |
| 20% | Apr 23 | Nov 2 |
| 30% | Apr 20 | Nov 4 |
| 40% | Apr 18 | Nov 6 |
| 50% | Apr 15 | Nov 9 |
| 60% | Apr 13 | Nov 12 |
| 70% | Apr 10 | Nov 16 |
| 80% | Apr 6 | Nov 20 |
| 90% | Apr 2 | Nov 25 |
Light frost vs. hard freeze
Average (50%) dates for each temperature. Tender plants are damaged at 36°F; most hardy crops survive until 28°F.
| Temperature | Last in spring | First in fall |
|---|---|---|
| Light frost (36°F) | Apr 28 | Oct 30 |
| Frost / freeze (32°F) | Apr 15 | Nov 9 |
| Hard freeze (28°F) | Apr 4 | Nov 21 |
Planting calendar for Mentor
Transplant Apr 22 – May 6
Transplant Apr 29 – May 13
Transplant Apr 29 – May 13
Transplant Apr 22 – May 6
Sow or transplant Apr 22 – May 6
Sow or transplant Apr 22 – May 6
Sow or transplant Apr 29 – May 13
Sow or transplant Mar 18 – Apr 1
Fall sowing Sep 14 – Oct 12
Fall sowing Sep 14 – Oct 5
Fall sowing Aug 31 – Sep 14
Sow or transplant Mar 18 – Apr 1
Fall sowing Aug 31 – Sep 28
Transplant Apr 1 – Apr 15
Fall sowing Aug 17 – Aug 31
Transplant Mar 25 – Apr 8
Fall sowing Aug 17 – Aug 31
Fall sowing Aug 17 – Aug 31
Fall sowing Sep 28 – Oct 19
Fall sowing Aug 31 – Sep 14
Plant Mar 18 – Apr 1
Based on the average last frost (Apr 15) and first frost (Nov 9). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.