Frost Dates for Southfield, MI
In Southfield, MI, the average last spring frost is around May 1 and the average first fall frost around Oct 17, for a growing season of about 165 days. For frost-tender plants, wait until May 16, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Farmington, MI weather station, 5 miles away, elevation 720 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 16 | Oct 1 |
| 20% | May 11 | Oct 6 |
| 30% | May 8 | Oct 10 |
| 40% | May 4 | Oct 13 |
| 50% | May 1 | Oct 17 |
| 60% | Apr 29 | Oct 19 |
| 70% | Apr 27 | Oct 22 |
| 80% | Apr 23 | Oct 25 |
| 90% | Apr 19 | Oct 29 |
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 13 | Oct 4 |
| Frost / freeze (32°F) | May 1 | Oct 17 |
| Hard freeze (28°F) | Apr 22 | Oct 27 |
Planting calendar for Southfield
Transplant May 8 – May 22
Transplant May 15 – May 29
Transplant May 15 – May 29
Transplant May 8 – May 22
Sow or transplant May 8 – May 22
Sow or transplant May 8 – May 22
Sow or transplant May 15 – May 29
Sow or transplant Apr 3 – Apr 17
Fall sowing Aug 22 – Sep 19
Fall sowing Aug 22 – Sep 12
Fall sowing Aug 8 – Aug 22
Sow or transplant Apr 3 – Apr 17
Fall sowing Aug 8 – Sep 5
Transplant Apr 17 – May 1
Fall sowing Jul 25 – Aug 8
Transplant Apr 10 – Apr 24
Fall sowing Jul 25 – Aug 8
Fall sowing Jul 25 – Aug 8
Fall sowing Sep 5 – Sep 26
Fall sowing Aug 8 – Aug 22
Plant Apr 3 – Apr 17
Based on the average last frost (May 1) and first frost (Oct 17). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.