Frost Dates for Conroe, TX
In Conroe, TX, the average last spring frost is around Feb 24 and the average first fall frost around Dec 2, for a growing season of about 285 days. For frost-tender plants, wait until Mar 17, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Conroe, TX weather station, under 1 mile away, elevation 245 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 17 | Nov 11 |
| 20% | Mar 9 | Nov 17 |
| 30% | Mar 4 | Nov 24 |
| 40% | Feb 28 | Nov 29 |
| 50% | Feb 24 | Dec 2 |
| 60% | Feb 17 | Dec 6 |
| 70% | Feb 9 | Dec 13 |
| 80% | Feb 2 | Dec 21 |
| 90% | Jan 26 | Jan 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) | Mar 9 | Nov 20 |
| Frost / freeze (32°F) | Feb 24 | Dec 2 |
| Hard freeze (28°F) | Feb 2 | Dec 23 |
Planting calendar for Conroe
Transplant Mar 3 – Mar 17
Transplant Mar 10 – Mar 24
Transplant Mar 10 – Mar 24
Transplant Mar 3 – Mar 17
Sow or transplant Mar 3 – Mar 17
Sow or transplant Mar 3 – Mar 17
Sow or transplant Mar 10 – Mar 24
Sow or transplant Jan 27 – Feb 10
Fall sowing Oct 7 – Nov 4
Fall sowing Oct 7 – Oct 28
Fall sowing Sep 23 – Oct 7
Sow or transplant Jan 27 – Feb 10
Fall sowing Sep 23 – Oct 21
Transplant Feb 10 – Feb 24
Fall sowing Sep 9 – Sep 23
Transplant Feb 3 – Feb 17
Fall sowing Sep 9 – Sep 23
Fall sowing Sep 9 – Sep 23
Fall sowing Oct 21 – Nov 11
Fall sowing Sep 23 – Oct 7
Plant Jan 27 – Feb 10
Based on the average last frost (Feb 24) and first frost (Dec 2). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.