Frost dates for 77302 — Conroe, TX
Last spring frostMar 11median date
First fall frostNov 19median date
Growing season253 daysfrost-free
Hardiness zone9aZone 9a
How Conroe compares
- In 8 years out of 10, the last spring frost in Conroe falls between February 14 and April 3, a 48-day window. The first fall frost falls between November 1 and December 9.
- The median last frost is 4 days earlier than the Texas median of Mar 15.
- Its 253-day growing season is longer than 63% of the 1,316 Texas places with a regular frost season (state median 245 days).
- The last frost is 8 days later than the zone 9a median of Mar 3. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 9a chart.
- The weather station records an average of 27 nights a year at or below 32°F.
- Compared with Cypress, TX, 44 km away, the last frost here is 20 days later than there and the growing season is 34 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 14 |
| 50% (median) | March 11 |
| 10% (safe for tender plants) | April 3 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 1 |
| 50% (median) | November 19 |
| 90% (late) | December 9 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Conroe, TX
Frost dates for 77302 — Conroe, TX — last frost Mar 11, first frost Nov 19, zone 9a. whenisthelastfrost.com
Crop
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Start indoors: Dec 17 to Dec 31Transplant outside: Feb 11 to Feb 25
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Mar 25 to Apr 8
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Mar 25 to Apr 8
Start indoors: Jan 14 to Jan 28Transplant outside: Mar 18 to Apr 1
Start indoors: Jan 14 to Jan 28Transplant outside: Feb 18 to Mar 4Sow outdoors: Feb 11 to Mar 18Plant for fall: Sep 24 to Oct 22
Start indoors: Jan 14 to Jan 28Transplant outside: Feb 11 to Feb 25Sow outdoors: Feb 11 to Feb 25Plant for fall: Sep 10 to Oct 1
Start indoors: Jan 14 to Jan 28Transplant outside: Feb 25 to Mar 11Plant for fall: Aug 13 to Sep 3
Start indoors: Jan 14 to Jan 28Transplant outside: Feb 18 to Mar 4Plant for fall: Aug 13 to Sep 3
Start indoors: Jan 14 to Jan 28Transplant outside: Feb 25 to Mar 11Plant for fall: Aug 13 to Sep 3
Start indoors: Jan 28 to Feb 11Transplant outside: Apr 1 to Apr 15Sow outdoors: Apr 1 to Apr 15
Start indoors: Jan 28 to Feb 11Transplant outside: Mar 18 to Apr 1
Sow outdoors: Jan 28 to Feb 18Plant for fall: Aug 27 to Sep 17
Sow outdoors: Jan 28 to Feb 18Plant for fall: Sep 24 to Oct 15
Sow outdoors: Feb 4 to Mar 18Plant for fall: Oct 8 to Oct 29
Start indoors: Feb 11 to Feb 18Transplant outside: Mar 25 to Apr 1Sow outdoors: Mar 18 to Apr 1Plant for fall: Sep 3 to Sep 17
Start indoors: Feb 11 to Feb 18Sow outdoors: Mar 18 to Apr 1Plant for fall: Sep 10 to Sep 24
Start indoors: Feb 11 to Feb 18Sow outdoors: Mar 18 to Apr 1
Start indoors: Feb 11 to Feb 18Transplant outside: Mar 25 to Apr 8
Sow outdoors: Feb 18 to Mar 18Plant for fall: Aug 27 to Sep 10
Sow outdoors: Feb 18 to Mar 18Plant for fall: Sep 10 to Sep 24
Sow outdoors: Feb 18 to Mar 11
Sow outdoors: Feb 25 to Mar 25Plant for fall: Sep 10 to Sep 24
Sow outdoors: Feb 25 to Mar 18Plant for fall: Sep 24 to Oct 15
Sow outdoors: Mar 18 to Apr 8Plant for fall: Sep 3 to Sep 17
Sow outdoors: Mar 18 to Apr 1
Transplant outside: Mar 25 to Apr 15
Plant for fall: Nov 5 to Dec 10
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Conroe, TX
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 17 – Dec 31 | Feb 11 – Feb 25 | — | — |
| Peppers | Dec 31 – Jan 14 | Mar 25 – Apr 8 | — | — |
| Eggplant | Dec 31 – Jan 14 | Mar 25 – Apr 8 | — | — |
| Tomatoes | Jan 14 – Jan 28 | Mar 18 – Apr 1 | — | — |
| Lettuce | Jan 14 – Jan 28 | Feb 18 – Mar 4 | Feb 11 – Mar 18 | Sep 24 – Oct 22 |
| Kale | Jan 14 – Jan 28 | Feb 11 – Feb 25 | Feb 11 – Feb 25 | Sep 10 – Oct 1 |
| Broccoli | Jan 14 – Jan 28 | Feb 25 – Mar 11 | — | Aug 13 – Sep 3 |
| Cabbage | Jan 14 – Jan 28 | Feb 18 – Mar 4 | — | Aug 13 – Sep 3 |
| Cauliflower | Jan 14 – Jan 28 | Feb 25 – Mar 11 | — | Aug 13 – Sep 3 |
| Okra | Jan 28 – Feb 11 | Apr 1 – Apr 15 | Apr 1 – Apr 15 | — |
| Basil | Jan 28 – Feb 11 | Mar 18 – Apr 1 | — | — |
| Peas | — | — | Jan 28 – Feb 18 | Aug 27 – Sep 17 |
| Spinach | — | — | Jan 28 – Feb 18 | Sep 24 – Oct 15 |
| Radishes | — | — | Feb 4 – Mar 18 | Oct 8 – Oct 29 |
| Cucumbers | Feb 11 – Feb 18 | Mar 25 – Apr 1 | Mar 18 – Apr 1 | Sep 3 – Sep 17 |
| Zucchini & Summer Squash | Feb 11 – Feb 18 | — | Mar 18 – Apr 1 | Sep 10 – Sep 24 |
| Winter Squash & Pumpkins | Feb 11 – Feb 18 | — | Mar 18 – Apr 1 | — |
| Melons & Watermelon | Feb 11 – Feb 18 | Mar 25 – Apr 8 | — | — |
| Carrots | — | — | Feb 18 – Mar 18 | Aug 27 – Sep 10 |
| Beets | — | — | Feb 18 – Mar 18 | Sep 10 – Sep 24 |
| Potatoes | — | — | Feb 18 – Mar 11 | — |
| Swiss Chard | — | — | Feb 25 – Mar 25 | Sep 10 – Sep 24 |
| Cilantro | — | — | Feb 25 – Mar 18 | Sep 24 – Oct 15 |
| Green Beans | — | — | Mar 18 – Apr 8 | Sep 3 – Sep 17 |
| Sweet Corn | — | — | Mar 18 – Apr 1 | — |
| Sweet Potatoes | — | Mar 25 – Apr 15 | — | — |
| Garlic | — | — | — | Nov 5 – Dec 10 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Conroe Montgomery Co Ap, TX weather station, 16 km away (elevation 246 ft (75 m)).
ZIP codes in Conroe: 77301 77302 77303 77304 77305 77306 77384 77385
Frost dates near Conroe
- Porter Feb 13 · Dec 9
- Spring Feb 19 · Dec 3
- Splendora Mar 7 · Nov 20
- New Caney Feb 13 · Dec 9
- Kingwood Feb 13 · Dec 9
- Hufsmith Feb 19 · Dec 3
- Willis Mar 11 · Nov 19
- Humble Feb 13 · Dec 9
Frequently asked questions
When is the last frost in Conroe, TX?
The median last spring frost in Conroe, TX is March 11. There is still about a 10% chance of frost after April 3, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Conroe, TX?
The median first fall frost is November 19, with about a 10% chance of frost before November 1.
How long is the growing season in Conroe, TX?
About 253 days between the median last spring frost and first fall frost.
What planting zone is Conroe, TX?
Conroe, TX is in USDA hardiness zone 9a.