Frost Dates for Plano, TX
In Plano, TX, the average last spring frost is around Mar 7 and the average first fall frost around Nov 21, for a growing season of about 259 days. For frost-tender plants, wait until Mar 29, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Richardson, TX weather station, 4 miles away, elevation 678 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% | Mar 29 | Nov 2 |
| 20% | Mar 19 | Nov 9 |
| 30% | Mar 14 | Nov 13 |
| 40% | Mar 10 | Nov 17 |
| 50% | Mar 7 | Nov 21 |
| 60% | Mar 3 | Nov 24 |
| 70% | Feb 28 | Nov 29 |
| 80% | Feb 25 | Dec 3 |
| 90% | Feb 18 | Dec 9 |
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 21 | Nov 10 |
| Frost / freeze (32°F) | Mar 7 | Nov 21 |
| Hard freeze (28°F) | Feb 24 | Dec 4 |
Planting calendar for Plano
Transplant Mar 14 – Mar 28
Transplant Mar 21 – Apr 4
Transplant Mar 21 – Apr 4
Transplant Mar 14 – Mar 28
Sow or transplant Mar 14 – Mar 28
Sow or transplant Mar 14 – Mar 28
Sow or transplant Mar 21 – Apr 4
Sow or transplant Feb 7 – Feb 21
Fall sowing Sep 26 – Oct 24
Fall sowing Sep 26 – Oct 17
Fall sowing Sep 12 – Sep 26
Sow or transplant Feb 7 – Feb 21
Fall sowing Sep 12 – Oct 10
Transplant Feb 21 – Mar 7
Fall sowing Aug 29 – Sep 12
Transplant Feb 14 – Feb 28
Fall sowing Aug 29 – Sep 12
Fall sowing Aug 29 – Sep 12
Fall sowing Oct 10 – Oct 31
Fall sowing Sep 12 – Sep 26
Plant Feb 7 – Feb 21
Based on the average last frost (Mar 7) and first frost (Nov 21). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.