Frost Dates for Greenfield, IN
In Greenfield, IN, the average last spring frost is around Apr 19 and the average first fall frost around Oct 22, for a growing season of about 185 days. For frost-tender plants, wait until May 7, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Greenfield, IN weather station, under 1 mile away, elevation 869 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% | May 7 | Oct 9 |
| 20% | May 1 | Oct 14 |
| 30% | Apr 26 | Oct 17 |
| 40% | Apr 22 | Oct 20 |
| 50% | Apr 19 | Oct 22 |
| 60% | Apr 17 | Oct 24 |
| 70% | Apr 13 | Oct 26 |
| 80% | Apr 11 | Oct 29 |
| 90% | Apr 6 | Nov 1 |
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) | May 1 | Oct 12 |
| Frost / freeze (32°F) | Apr 19 | Oct 22 |
| Hard freeze (28°F) | Apr 7 | Nov 1 |
Planting calendar for Greenfield
Transplant Apr 26 – May 10
Transplant May 3 – May 17
Transplant May 3 – May 17
Transplant Apr 26 – May 10
Sow or transplant Apr 26 – May 10
Sow or transplant Apr 26 – May 10
Sow or transplant May 3 – May 17
Sow or transplant Mar 22 – Apr 5
Fall sowing Aug 27 – Sep 24
Fall sowing Aug 27 – Sep 17
Fall sowing Aug 13 – Aug 27
Sow or transplant Mar 22 – Apr 5
Fall sowing Aug 13 – Sep 10
Transplant Apr 5 – Apr 19
Fall sowing Jul 30 – Aug 13
Transplant Mar 29 – Apr 12
Fall sowing Jul 30 – Aug 13
Fall sowing Jul 30 – Aug 13
Fall sowing Sep 10 – Oct 1
Fall sowing Aug 13 – Aug 27
Plant Mar 22 – Apr 5
Based on the average last frost (Apr 19) and first frost (Oct 22). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.