Frost Dates for Prosper, TX
In Prosper, TX, the average last spring frost is around Mar 17 and the average first fall frost around Nov 15, for a growing season of about 241 days. For frost-tender plants, wait until Apr 5, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Mckinney Municipal Airport, TX weather station, 13 miles away, elevation 586 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 5 | Oct 27 |
| 20% | Mar 31 | Nov 2 |
| 30% | Mar 26 | Nov 7 |
| 40% | Mar 21 | Nov 11 |
| 50% | Mar 17 | Nov 15 |
| 60% | Mar 13 | Nov 19 |
| 70% | Mar 8 | Nov 24 |
| 80% | Mar 3 | Nov 30 |
| 90% | Feb 27 | Dec 5 |
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) | Mar 31 | Nov 3 |
| Frost / freeze (32°F) | Mar 17 | Nov 15 |
| Hard freeze (28°F) | Mar 4 | Nov 30 |
Planting calendar for Prosper
Transplant Mar 24 – Apr 7
Transplant Mar 31 – Apr 14
Transplant Mar 31 – Apr 14
Transplant Mar 24 – Apr 7
Sow or transplant Mar 24 – Apr 7
Sow or transplant Mar 24 – Apr 7
Sow or transplant Mar 31 – Apr 14
Sow or transplant Feb 17 – Mar 3
Fall sowing Sep 20 – Oct 18
Fall sowing Sep 20 – Oct 11
Fall sowing Sep 6 – Sep 20
Sow or transplant Feb 17 – Mar 3
Fall sowing Sep 6 – Oct 4
Transplant Mar 3 – Mar 17
Fall sowing Aug 23 – Sep 6
Transplant Feb 24 – Mar 10
Fall sowing Aug 23 – Sep 6
Fall sowing Aug 23 – Sep 6
Fall sowing Oct 4 – Oct 25
Fall sowing Sep 6 – Sep 20
Plant Feb 17 – Mar 3
Based on the average last frost (Mar 17) and first frost (Nov 15). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.