Sow Asian greens in Alabama twice a year: from late February through March, and from late August through October. Fall is the better window, because the plants grow into cool weather instead of racing toward summer heat. Both windows hang on frost dates, and those shift by a week or two depending on where your garden sits. For the wider picture, see Growing Asian Greens in Alabama.
The short answer for Alabama
Sow seed from late February to the end of March, then again from late August through October. The frost dates behind that come from a reference weather station at an airport. The last spring freeze there falls between March 19 and April 3, and the first fall freeze between November 2 and November 16.
Those ranges come from NOAA’s 1991-2020 Climate Normals and describe the chance of a 32°F freeze. Each is the stretch of dates where that chance sits between 30 and 70 percent. In spring, the odds of another freeze fall from about 70 percent on March 19 to about 30 percent on April 3. In fall, the odds that a freeze has already hit rise over the same kind of span in November.
Suburban and rural gardens usually run behind the airport. Expect the last spring frost to come later and the first fall frost earlier, often by one to two weeks, and by more at elevation. Treat the dates above as the reference-city figure and shift your own calendar accordingly.
When do you sow Asian greens in spring in Alabama?
Start in late February and keep going through March. Bok choy, mizuna, tatsoi and komatsuna can be sown before the last freeze has passed; check with your county extension office. A sheet of row cover handles the occasional hard night. Stop sowing once spring warms up, because lengthening days and rising heat push these plants to send up flower stalks.
When do you sow Asian greens in fall in Alabama?
Begin sowing in late summer and keep sowing through fall, checking your local county extension office for timing. Early sowings go into hot soil and need shade and steady moisture to come up. Later ones grow slower as days shorten. The coldest month at the Huntsville reference station averages a nightly low of 33.1°F, so hardy types can stand through much of the winter, with cover on the coldest nights.
| Window | Sow | What drives it |
|---|---|---|
| Spring | Late February through March | Last 32°F freeze, March 19 to April 3 (reference city) |
| Fall | Late August through October | First 32°F freeze, November 2 to November 16 (reference city) |
| Winter, covered | Hardy types, early fall | Coldest-month average low of 33.1°F |
What will not work here
Sowing in April or May fails most often. Summers here are long, hot and humid, and an Asian green sown into April warmth has little time before it bolts. You get a stalk and bitter leaves instead of a head.
Why do spring sowings of Asian greens bolt so fast?
The last freeze in the reference city lands between March 19 and April 3, and warm weather follows quickly. A crop sown at the end of that range has only a short stretch of cool days. Sow in late winter so plants are well along before heat arrives, and pick them young. Slower, heavy-headed types are a poor bet for spring here, because they need cool weather for longer than spring lasts.
What goes wrong with fall sowings?
Two mistakes show up. The first is sowing too late. Seed put in during November gets short days and cooling soil, and the plants reach the first freeze, expected November 2 to November 16 in the reference city and earlier in many gardens, still small. The second is sowing too early, in August, without shade or water. Seed dries out in the soil before it sprouts, and a bed watered once a week will not carry it through. Seedlings in hot, dry soil need light watering every day until they are up.
Humidity changes how you space plants. Warm, damp air lingers in a crowded bed and encourages leaf spots and mildew. Give each plant the spacing the seed packet lists and thin early, so air moves between leaves. Pests follow the same logic. Watch young leaves of mustard-family crops for small holes during warm spells, and check with your county extension office for control.
Winter has its own limit. A coldest-month average low of 33.1°F means most nights stay near freezing. Individual nights drop well below that, and gardens in the north or on higher ground see more of them. Even hardy greens suffer in a hard freeze if left bare.
What changes across Alabama
Alabama has no single answer. The USDA Plant Hardiness Zone Map (2023 edition, built on 1991-2020 normals) places the state in zones 7a through 9a. That zone system rests on one variable, the average annual extreme minimum temperature. Planting dates differ across the state, so check your local county extension office for your area.
In the north and at elevation, spring freezes linger and fall freezes arrive early. Start the fall sowing at the early end of the range, in late August, and aim to have plants established before the first freeze. Expect to start spring sowing a bit later and to cover more often. The 33.1°F coldest-month figure comes from Huntsville, so it describes the cooler half of the state.
Check with your local county extension office for how the fall window and winter harvests vary in your area. Heat is the problem there. Check with your local county extension office for how the season’s timing affects spring sowing and fall sowings. A gardener in the middle of the state falls between these two patterns.
To find your own zone, use the USDA Plant Hardiness Zone Map and enter your ZIP code. Then read the dates above as a reference point and move them earlier or later to match.
Where to check this for your own county
The Alabama Cooperative Extension System is the place to confirm your dates. It is the state’s land-grant extension service, with offices serving every county. A county recommendation beats a state one, and a statewide calendar, including the windows above, works best as a starting frame.
Look for three things on the site or at your county office:
- The planting calendar for your area, which your county extension office can point you to.
- Local frost dates for your county, ideally for a station close to your town rather than the nearest big airport.
- Vegetable varieties trialed in your county, including which Asian greens held up through heat and which bolted early.
Once you have your dates, The Best Asian Greens for Alabama can help you match types to the window. County Extension staff and Master Gardener volunteers can also tell you what your neighbors have grown successfully, which is useful for hill, valley or coastal sites that run hotter or colder than the regional averages.
Checking this against your own garden
Your own observations outrank every date above. Three are worth watching.
Soil warmth by feel. Push a hand a few inches into the bed in the morning. In late summer, soil that still feels warm like a bath is too hot for good germination, so shade it or wait a week. In late winter, soil that feels cold and sticky means seed will sit and may rot. A bed that warms earlier than the neighbor’s is a sunny, sheltered spot where you can sow sooner.
First true leaves. The first pair after the seed leaves tells you how the bed is behaving. If a test row of a fast type like mizuna shows true leaves in good time and stays sturdy, the timing works. If seedlings stretch and flop, the bed is too warm or too shaded.
The first flower stalk. In spring, watch for a stem lengthening from the center of a plant. The date it appears is your cutoff for next year’s spring sowing, and it will come earlier in a hot, sunny bed than in a cooler corner. A low spot where frost settles first in fall marks the edge of your fall season in the same way.
Common questions
Can I sow Asian greens in Alabama in summer?
Not reliably. Heat prevents good germination and sends plants to flower. Wait for late August, and give the seedbed shade and daily moisture until seedlings are up.
When is the last spring frost in Alabama?
At the reference weather station, the 32°F freeze probability sits in the 30 to 70 percent band from March 19 to April 3. Gardens in suburbs, the country and at elevation often see it one to two weeks later. Your county Extension office can give a local date.
Will Asian greens survive an Alabama winter?
Hardy types such as tatsoi and mizuna often do, especially with row cover; check with your county extension office. The coldest month averages a nightly low of 33.1°F at the Huntsville reference station, but individual nights go lower, and hard freezes damage even hardy greens.
Is fall or spring better for Asian greens in Alabama?
Fall. Plants mature in cooling weather and have a long stretch before the first freeze, which falls between November 2 and November 16 in the reference city. Spring crops have a short window before heat makes them bolt.