Frost Dates for Smyrna, TN
In Smyrna, TN, the average last spring frost is around Apr 13 and the average first fall frost around Oct 21, for a growing season of about 189 days. For frost-tender plants, wait until May 4, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Smyrna 6S, TN weather station, 4 miles away, elevation 550 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 4 | Oct 8 |
| 20% | Apr 26 | Oct 13 |
| 30% | Apr 21 | Oct 16 |
| 40% | Apr 17 | Oct 18 |
| 50% | Apr 13 | Oct 21 |
| 60% | Apr 10 | Oct 23 |
| 70% | Apr 7 | Oct 26 |
| 80% | Apr 4 | Oct 29 |
| 90% | Mar 31 | Nov 2 |
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 29 | Oct 12 |
| Frost / freeze (32°F) | Apr 13 | Oct 21 |
| Hard freeze (28°F) | Apr 1 | Oct 30 |
Planting calendar for Smyrna
Transplant Apr 20 – May 4
Transplant Apr 27 – May 11
Transplant Apr 27 – May 11
Transplant Apr 20 – May 4
Sow or transplant Apr 20 – May 4
Sow or transplant Apr 20 – May 4
Sow or transplant Apr 27 – May 11
Sow or transplant Mar 16 – Mar 30
Fall sowing Aug 26 – Sep 23
Fall sowing Aug 26 – Sep 16
Fall sowing Aug 12 – Aug 26
Sow or transplant Mar 16 – Mar 30
Fall sowing Aug 12 – Sep 9
Transplant Mar 30 – Apr 13
Fall sowing Jul 29 – Aug 12
Transplant Mar 23 – Apr 6
Fall sowing Jul 29 – Aug 12
Fall sowing Jul 29 – Aug 12
Fall sowing Sep 9 – Sep 30
Fall sowing Aug 12 – Aug 26
Plant Mar 16 – Mar 30
Based on the average last frost (Apr 13) and first frost (Oct 21). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.