Gardening in Dallas-Fort Worth-Arlington, TX
This metro spans USDA zones 8a to 8b, so there is no single zone for Dallas-Fort Worth-Arlington, TX and anyone who gives you one is rounding. 91% of its ZIP codes are zone 8b; the rest are not.
Which zone you are in depends where you are
Dallas-Fort Worth-Arlington, TX covers 2 hardiness zones. A guide that gives the metro one zone has picked whichever is largest and rounded everyone else into it — which is fine for the 91% in zone 8b and wrong for the other 9%. Here is the actual split.
| Zone | ZIP codes | Share | |
|---|---|---|---|
| 8b | 246 | 91% | |
| 8a | 25 | 9% |
Zones are published per ZIP code, so yours is exact even though the metro's is not. The hardiness tool will tell you which one you are in.
Your freeze dates
Those are the earliest and latest medians among the 37 stations serving this metro — not an average, and not one station standing in for the rest. Half of years freeze later than a station's own median.
The spread is the point. Even in a metro that is one hardiness zone throughout, its stations disagree about the last spring freeze. Hardiness zone and frost date measure different things — a zone is the average annual coldest night, a freeze date is when the season turns — and a place can be uniform in one and varied in the other. Use the tools below with your own ZIP rather than the ends of this range.
Your growing season
NOAA publishes a growing-season length for each station, and across the 37 stations serving Dallas-Fort Worth-Arlington, TX it runs 219–272 days . That figure is published, not computed from the two freeze dates — subtracting one from the other gives the wrong answer wherever a season crosses New Year. Mean summer high (June–August) runs 91–96 °F , at or above the 90 °F point where cool-season crops bolt and tomato and pepper pollen fails — so midsummer sowings of lettuce and its relatives are worth holding here.
When to start seeds in Dallas-Fort Worth-Arlington, TX
Every spring job for 63 crop dates, counted from this metro's own last spring freeze. Each is a range across all 37 stations — the earliest and latest that job falls anywhere in the metro — because no one station speaks for the whole area.
| Crop | Job | When | Offset |
|---|---|---|---|
| Green Onions | Start indoors | January 5 – February 4 | 8 weeks before |
| Peppers | Start indoors | January 5 – February 4 | 8 weeks before |
| Broccoli | Start indoors | January 19 – February 18 | 6 weeks before |
| Cabbage | Start indoors | January 19 – February 18 | 6 weeks before |
| Collards | Start indoors | January 19 – February 18 | 6 weeks before |
| Kale | Start indoors | January 19 – February 18 | 6 weeks before |
| Leaf Lettuce | Start indoors | January 19 – February 18 | 6 weeks before |
| Peas | Direct sow | January 19 – February 18 | 6 weeks before |
| Spinach | Direct sow | January 19 – February 18 | 6 weeks before |
| Sweet Potato | Start indoors | January 19 – February 18 | 6 weeks before |
| Tomatoes | Start indoors | January 19 – February 18 | 6 weeks before |
| Bok Choy | Start indoors | January 26 – February 25 | 5 weeks before |
| Kohlrabi | Start indoors | January 26 – February 25 | 5 weeks before |
| Swiss Chard | Start indoors | January 26 – February 25 | 5 weeks before |
| Arugula | Direct sow | February 2 – March 4 | 4 weeks before |
| Baby Salad Greens | Direct sow | February 2 – March 4 | 4 weeks before |
| Beets | Direct sow | February 2 – March 4 | 4 weeks before |
| Green Onions | Direct sow | February 2 – March 4 | 4 weeks before |
| Mustard Greens | Direct sow | February 2 – March 4 | 4 weeks before |
| Okra | Start indoors | February 2 – March 4 | 4 weeks before |
| Radishes | Direct sow | February 2 – March 4 | 4 weeks before |
| Turnips | Direct sow | February 2 – March 4 | 4 weeks before |
| Cabbage | Set out | February 9 – March 11 | 3 weeks before |
| Carrots | Direct sow | February 9 – March 11 | 3 weeks before |
| Collards | Direct sow | February 9 – March 11 | 3 weeks before |
| Collards | Set out | February 9 – March 11 | 3 weeks before |
| Cucumbers | Start indoors | February 9 – March 11 | 3 weeks before |
| Green Onions | Set out | February 9 – March 11 | 3 weeks before |
| Kale | Direct sow | February 9 – March 11 | 3 weeks before |
| Kale | Set out | February 9 – March 11 | 3 weeks before |
| Kohlrabi | Direct sow | February 9 – March 11 | 3 weeks before |
| Kohlrabi | Set out | February 9 – March 11 | 3 weeks before |
| Leaf Lettuce | Direct sow | February 9 – March 11 | 3 weeks before |
| Pumpkins | Start indoors | February 9 – March 11 | 3 weeks before |
| Summer Squash | Start indoors | February 9 – March 11 | 3 weeks before |
| Winter Squash | Start indoors | February 9 – March 11 | 3 weeks before |
| Zucchini | Start indoors | February 9 – March 11 | 3 weeks before |
| Bok Choy | Direct sow | February 16 – March 18 | 2 weeks before |
| Bok Choy | Set out | February 16 – March 18 | 2 weeks before |
| Broccoli | Set out | February 16 – March 18 | 2 weeks before |
| Cilantro | Direct sow | February 16 – March 18 | 2 weeks before |
| Leaf Lettuce | Set out | February 16 – March 18 | 2 weeks before |
| Swiss Chard | Direct sow | February 16 – March 18 | 2 weeks before |
| Swiss Chard | Set out | February 16 – March 18 | 2 weeks before |
| Dill | Direct sow | February 23 – March 25 | 1 week before |
| Bush Beans | Direct sow | March 9 – April 8 | 1 week after |
| Cucumbers | Set out | March 9 – April 8 | 1 week after |
| Pumpkins | Direct sow | March 9 – April 8 | 1 week after |
| Pumpkins | Set out | March 9 – April 8 | 1 week after |
| Summer Squash | Direct sow | March 9 – April 8 | 1 week after |
| Summer Squash | Set out | March 9 – April 8 | 1 week after |
| Sweet Corn | Direct sow | March 9 – April 8 | 1 week after |
| Tomatoes | Set out | March 9 – April 8 | 1 week after |
| Winter Squash | Direct sow | March 9 – April 8 | 1 week after |
| Winter Squash | Set out | March 9 – April 8 | 1 week after |
| Zucchini | Direct sow | March 9 – April 8 | 1 week after |
| Zucchini | Set out | March 9 – April 8 | 1 week after |
| Cucumbers | Direct sow | March 16 – April 15 | 2 weeks after |
| Okra | Direct sow | March 16 – April 15 | 2 weeks after |
| Okra | Set out | March 16 – April 15 | 2 weeks after |
| Peppers | Set out | March 16 – April 15 | 2 weeks after |
| Southern Peas | Direct sow | March 16 – April 15 | 2 weeks after |
| Sweet Potato | Set out | March 16 – April 15 | 2 weeks after |
The week offsets are conventional extension guidance and vary by variety; the freeze dates they are counted from are measured. For a single date rather than a range, run when do I start my seeds? with your own ZIP code.
What survives the winter changes across Dallas-Fort Worth-Arlington, TX
Of 74 perennial fruits, nuts, berries, vegetables and herbs, 57 come through the winter in zone 8a and only 54 in zone 8b. That is a different garden at each end of the same metro.
| Zone | ZIPs | Survive | Fail for being too warm |
|---|---|---|---|
| 8a | 25 | 57 of 74 | 8 |
| 8b | 246 | 54 of 74 | 11 |
The last column is the counterintuitive one, and it is why the totals do not simply rise as the winters get milder. Most temperate fruit needs a documented number of hours below about 45 °F to break dormancy and set a crop, so an apple fails in a winter that is too warm; currants and rhubarb cook in the summer heat that comes with it. See the full list with reasons.
The 37 stations behind these numbers
Every figure above comes from these, and each is named so you can check it. Distances vary by ZIP code, so the tools report yours rather than this page guessing.
| Station | NOAA ID | Last spring freeze | First fall freeze | Season |
|---|---|---|---|---|
| Alvord 3 N, TX | USC00410206 | April 1 | November 4 | 219 days |
| Arlington Muni AP, TX | USW00053907 | March 9 | November 21 | 256 days |
| Arlington Six Flags, TX | USC00410337 | March 9 | November 20 | 253 days |
| Bardwell Dam, TX | USC00410518 | March 8 | November 21 | 256 days |
| Benbrook Dam, TX | USC00410691 | March 14 | November 16 | 245 days |
| Bridgeport, TX | USC00411063 | March 29 | November 7 | 222 days |
| Burleson, TX | USC00411246 | March 21 | November 14 | 236 days |
| Cleburne, TX | USC00411800 | March 17 | November 12 | 240 days |
| Dallas Ft Worth AP, TX | USW00003927 | March 8 | November 24 | 262 days |
| Dallas Love FLD, TX | USW00013960 | March 2 | November 29 | 272 days |
| Dallas Redbird AP, TX | USW00003971 | March 6 | November 25 | 265 days |
| Decatur, TX | USC00412334 | March 20 | November 11 | 237 days |
| Denton 2 SE, TX | USC00412404 | March 13 | November 20 | 251 days |
| Denton Muni AP, TX | USW00003991 | March 24 | November 7 | 227 days |
| Ferris, TX | USC00413133 | March 12 | November 19 | 253 days |
| Ft Worth Alliance AP, TX | USW00053909 | March 12 | November 17 | 249 days |
| Ft Worth Meacham FLD Naaf, TX | USW00093904 | March 5 | November 24 | 264 days |
| Ft Worth Meacham FLD, TX | USW00013961 | March 11 | November 19 | 252 days |
| Ft Worth Nas, TX | USW00013911 | March 3 | November 27 | 270 days |
| Ft Worth Nature Ctr, TX | USC00413289 | March 13 | November 20 | 253 days |
| Ft Worth Wsfo, TX | USC00413285 | March 10 | November 20 | 255 days |
| Granbury 5N, TX | USC00413675 | March 24 | November 9 | 228 days |
| Grapevine Dam, TX | USC00413691 | March 14 | November 17 | 249 days |
| Greenville Kgvl Radio, TX | USC00413734 | March 18 | November 16 | 244 days |
| Hillsboro, TX | USC00414182 | March 21 | November 10 | 235 days |
| Joe Pool Lake, TX | USC00414597 | March 20 | November 13 | 236 days |
| Kaufman 3 SE, TX | USC00414705 | March 16 | November 14 | 243 days |
| Lake Tawakoni, TX | USC00414980 | March 16 | November 14 | 242 days |
| Lavon Dam, TX | USC00415094 | March 10 | November 19 | 254 days |
| Mckinney Municipal Airport, TX | USC00415766 | March 17 | November 15 | 241 days |
| Mckinney Muni AP, TX | USW00053914 | March 18 | November 11 | 239 days |
| Mineral Wells AP, TX | USW00093985 | March 24 | November 10 | 231 days |
| Pilot Point Isl Du Boi, TX | USC00417028 | March 24 | November 16 | 237 days |
| Richardson, TX | USC00417588 | March 7 | November 21 | 259 days |
| Terrell Muni AP, TX | USW00053911 | March 11 | November 18 | 250 days |
| Waxahachie, TX | USC00419522 | March 16 | November 16 | 245 days |
| Weatherford, TX | USC00419532 | March 25 | November 8 | 230 days |
These are medians, not averages — NOAA publishes freeze dates as a probability distribution, and half of years freeze later than the date shown.
Work out your own dates
Each of these takes a ZIP code and answers for that ZIP alone, citing the station it used and how far away it is. There is a ZIP box in the header of every page.
- What survives my winter?
Runs on the hardiness zone, so it answers for all of Dallas-Fort Worth-Arlington, TX at once — zone across 74 perennial fruits, berries, vegetables and herbs.
- When do I start my seeds?
Dates every spring job from your own last freeze — sow indoors, set out, direct sow.
- When do I sow the next round?
How often each crop is worth re-sowing, and when the next sowing is due.
- What can I still plant?
Counts the growing days left before your first fall freeze, crop by crop.
Where these numbers come from
The hardiness zone is the USDA 2023 Plant Hardiness Zone Map, published per ZIP code by PRISM at Oregon State. The freeze dates are NOAA's 1991–2020 Climate Normals, read from every station whose normals cover a ZIP code in this metro. Nothing here is estimated, and no station stands in for another.
This page names no single station on purpose. Picking one to represent a metro sounds reasonable and is not: the station serving the most ZIP codes is an artifact of where ZIP centroids happen to fall, and it selects a lock on the Monongahela for Pittsburgh and a far southern suburb for Chicago. A range across every station is true; a single cited date for a whole metro is not.