Winter Gardening in Texas: A Zone 6b–9b Guide to What to Plant and Harvest, November Through February

A gardener in Amarillo and a gardener in Brownsville are reading the same “winter gardening in Texas” advice — and it’s wrong for at least one of them. Texas spans USDA hardiness zones 6b through 9b, and the 2023 USDA map update — the first revision in over a decade — shifted most of the state about half a zone warmer, roughly 4 to 5°F, according to Texas A&M AgriLife Extension horticulturists [8]. If your calendar still assumes the old zone, your November planting window is already off by weeks.

That gap matters because Texas winter gardening runs on a tighter clock than most regions: cool-season crops need enough weeks in the ground before a killing freeze to size up, and enough weeks before the last spring frost to finish before summer heat shuts the window again. Get the regional timing wrong in either direction and you either lose transplants to an early freeze or miss the harvest entirely.

This guide skips the one-size-fits-Texas approach. Below is what to plant and harvest by region from November through February, why frost actually improves the flavor of certain crops, why citrus harvest belongs in this conversation, and why “no pests in winter” is a myth worth correcting before it costs you a bed of seedlings.

Texas Doesn’t Have One Winter — Match Your Zone to the Calendar

Start here before you plant anything: find your region in the table below. A November transplant date that works in Houston can kill the same seedling in Amarillo, and a “last planting window” that closes in December for the Panhandle is still wide open in the Rio Grande Valley.

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[3] Notice the spread: Amarillo’s growing window closes almost two months before Houston’s even opens. If a source tells you to “transplant broccoli in November,” that’s true for Dallas and false for the Panhandle, where a hard freeze may have already hit. Bookmark your row in this table — every section below refers back to it.

The 2023 zone shift isn’t cosmetic, either. A 4-5°F warmer winter minimum means plants and citrus varieties once considered too cold-sensitive for a given region now have a better realistic chance of surviving there [8] — worth rechecking against the current zone 8 plant list before assuming last decade’s advice still applies, and worth being cautious about in the other direction: a half-zone warmer on paper doesn’t mean your coldest nights won’t still hit the old numbers some years.

November: The Last Transplant Window, and It Isn’t the Same Date Twice

Cold-hardy transplants — broccoli, cabbage, lettuce, kale, collards — need 10 to 16 weeks before a killing freeze to reach a size that survives it, and lettuce needs roughly 10 to 14 weeks [1]. Counting backward from your region’s first frost date above tells you whether November transplanting still works for you or whether you’ve already missed it for this cycle.

In Central and South Texas (Austin, San Antonio, Houston), November is still valid transplant territory for these crops. In the Panhandle, where first frost lands in late October, November transplants of tender seedlings risk hitting a hard freeze before they’ve hardened off — direct-seeding fast, cold-tolerant greens or waiting for a late-winter window is the safer call there. Our broccoli growing guide and Brussels sprout guide cover transplant sizing in more depth if you’re cutting it close on timing.

Peas go into the ground now too, but as seed rather than transplant — they resent root disturbance and establish faster sown directly where they’ll grow. Onion sets and garlic cloves also go in during November across most of the state; neither is a November harvest, but both need this exact cold exposure window to bulb correctly the following year, so skipping it costs you the whole crop, not just a few weeks of delay. For Panhandle and North Texas gardeners specifically, our November zone 8 task list and zone 9 task list break the month down further by exact zone.

December and January: Protect What’s Growing, Harvest What’s Ready

By December, the job shifts from planting to protecting and harvesting. Texas A&M AgriLife recommends frost cloth or blankets over plastic — plastic in direct contact with foliage transfers cold rather than blocking it — and, for cold-sensitive plants like citrus, old-style incandescent holiday lights placed under (never touching) the cloth for extra warmth. Watering soil before a hard freeze also helps, since moist soil holds and releases heat more slowly than dry soil, buffering root-zone temperature swings. Remove covers once temperatures climb back above freezing so plants don’t overheat underneath them [6]. A 2–3 inch layer of organic mulch over root zones adds further insulation — our mulching guide covers depth and material choices in detail.

Here’s what most winter gardening advice leaves out: frost doesn’t just make kale and collards tolerable, it makes them measurably sweeter. When temperatures drop, these plants convert stored starch into soluble sugars, which function like a natural antifreeze by lowering the freezing point inside plant cells. Peer-reviewed research on cold-acclimating plants traces this to a specific gene-regulation pathway (CBF/DREB1A) that switches on when temperatures drop, triggering the plant to shuttle stored starch into soluble sugar — a genuine, gene-regulated survival mechanism, not folklore [5]. Leave your kale and collards in the ground through a light freeze rather than rushing to harvest before cold weather — the flavor reward is real and biologically explained, not a gardening myth. I’ve picked collard leaves the morning after a hard freeze and again a week later with no frost in between, and the post-freeze batch was consistently milder — the kind of difference you notice in the first bite, not something you have to squint to taste. Our kale winter-growing guide has more on timing that harvest correctly.

If you’re on the Gulf Coast, December through February also means citrus harvest — something most “winter gardening” roundups skip entirely because they’re written for vegetable gardens only. Satsuma mandarins are the most cold-tolerant sweet citrus available, with fruiting typically finished before the coldest weather arrives, and cold-hardy cultivars tolerating temperatures into the high teens depending on the variety; kumquats are similarly hardy and fruit from October through March [4]. Both need protection their first few winters — see our citrus tree care hub for establishment-year specifics.

The Winter Pest Myth: Humidity Doesn’t Take a Break

A common claim in Texas winter gardening advice is that cold weather ends pest pressure entirely. Insect activity does drop sharply after the first hard freeze, but that’s only half the risk picture — it ignores fungal and bacterial disease, which thrives in exactly the conditions a humid Gulf Coast winter provides: frequent rain, heavy dew, and mild daytime temperatures. University of Georgia Extension research is direct on this: wet foliage and crowded plants are the real culprits, and disease spreads readily on hands and clothing when leaves are wet [7]. The fix isn’t a fungicide schedule — it’s spacing plants for airflow, watering at the soil line instead of overhead, and staying out of the bed while foliage is still wet from rain or dew. If you do need to use a sprinkler during a dry spell, run it on a sunny morning so leaves dry before evening rather than sitting wet overnight, and keep a layer of mulch under leafy crops so rain doesn’t splash soil-borne spores onto lower leaves [7]. Our guide to preventing and treating fungal infections covers the specific symptoms to watch for if a wet winter catches you off guard.

February: The Second Planting Window Before Spring

February opens a second cool-season planting window in most of the state — beets, carrots, cabbage, and cauliflower can go in from seed, while earlier transplants like broccoli and lettuce move outdoors as space frees up [1]. Whether you’re planting for a February harvest or starting spring crops indoors depends entirely on your region’s last spring frost date from the table above: Houston and the Rio Grande Valley are already past their last frost risk by mid-to-late February, while North Texas and the Panhandle still have four to eight weeks of frost risk ahead. Jumping the gun in Amarillo means replanting after the next hard freeze; waiting too long in Houston means missing your best cool-season harvest window before summer heat arrives.

This is also the month to stagger plantings of fast-maturing crops like radishes and spinach rather than sowing everything at once — succession planting a small row every one to two weeks stretches a single harvest window into weeks of continuous picking instead of one glut followed by nothing. Check February zone 8 tasks or zone 9 tasks for the exact adjustments for your area.

Frequently Asked Questions

Can I start a vegetable garden in Texas in the winter?
Yes, in most of the state. Cool-season crops like lettuce, kale, spinach, and broccoli are planted specifically to grow through Texas winters rather than despite them — the main variable is timing your planting against your region’s frost dates rather than a single statewide date.

Do I need to cover my plants every night in winter?
No. Established cold-hardy vegetables like kale, collards, and spinach tolerate light-to-moderate frost without covering. Reserve frost cloth for hard freezes (below the mid-20s°F), young transplants, and cold-sensitive plants like citrus.

Which vegetables actually taste better after a frost?
Kale, collards, Brussels sprouts, and spinach are the most noticeably sweeter after a light freeze, because cold triggers a starch-to-sugar conversion inside the plant’s cells [5].

Can citrus trees survive a Texas freeze?
Cold-hardy varieties like satsuma mandarins and kumquats can tolerate real cold for their type, but young or newly planted trees need active protection — frost cloth, added heat sources, or windbreak placement — for their first few winters [4][6].

Sources

1. Texas Home Vegetable Gardening Guide — Texas A&M AgriLife Extension Service
2. USDA Plant Hardiness Zone Map — USDA Agricultural Research Service
3. First & Last Frost Dates of Texas Cities and Towns — plantingzonesbyzipcode.com (NOAA 1991–2020 data)
4. Cold-Hardy Citrus — University of Florida IFAS Gardening Solutions
5. Unveiling the Cold Acclimation of Alfalfa: Insights into Its Starch-Soluble Sugar Dynamic Transformation — Plants (Basel), peer-reviewed, via PMC
6. Protect Livestock, Plants, Pipes and Pets from Winter Weather — Texas A&M AgriLife Today
7. Disease Management in the Home Vegetable Garden (C862) — University of Georgia Cooperative Extension
8. USDA Releases New Plant Hardiness Zone Map (2023 update, with Texas A&M AgriLife Extension commentary) — KBTX News