Plan on two windows in West Virginia: a short spring sowing once the ground can be worked, and a main sowing in late summer for fall and early winter harvest. Fall is the better bet. Spring-sown Asian greens run into lengthening days and rising heat, and many bolt. Greens sown in late summer mature into cooling weather.
When the soil is warm enough in West Virginia
The date most gardeners ask about is the last spring frost. At Charleston, it falls between April 9 and April 23 (NOAA NCEI 1991-2020 Climate Normals, 32F freeze probabilities, 30-70% band, station USW00013866). A frost date is a probability, so a freeze after the later date can still happen in some years. Charleston also sits in a river valley. Hillsides and higher ground across the state freeze later in spring and earlier in fall.
Frost only tells you when the air stops threatening the seedlings. Seeds and young roots respond to the soil, and soil warms more slowly than air. A bed that saw a 60 F afternoon may still be cold and wet at 2 inches down. Asian greens germinate in cooler ground than tomatoes or beans do, so you do not need summer warmth. You do need soil that has drained and crumbles in your hand instead of smearing into a ribbon. Pushing a soil thermometer in at planting depth first thing in the morning gives a better answer than the calendar.
In practice, the first sowing goes in as soon as the bed is workable, which in the Charleston area usually means around the frost window. Farther up in the hills, it means later. Use a row cover to take the edge off a late freeze. Spring plantings are a sprint. The longer days of May push the plant to flower, so choose quick, small types and harvest young.
The late-summer sowing works on a different clock. Count backward from the first fall frost, which at Charleston arrives between October 18 and November 1. Check the seed packet for days to maturity. For crops sown directly in the ground, that number counts from sowing. For transplants, it counts from the day you set them out. Pad the count a little, because growth slows as autumn days shorten.
A few types matter here. Leafy greens such as tatsoi, mizuna, komatsuna and pak choi are the usual choices. Root types such as daikon and turnips need the same cool finish. Turnips and rutabagas are brassicas. They share their pests and diseases with cabbage, kale and mustard, so a bed that held any of those last year is not a fresh bed. The Growing Asian Greens: Fast, Cold-Hardy, and Prone to Bolting guide covers the crop in general terms. Your state extension service knows which varieties have done well in West Virginia trials, and those matter more than any list printed elsewhere.
How long the season lasts here
The reference station has about 192 frost-free days between the mean last spring frost and the mean first fall frost, pairing April 9 with October 18 and April 23 with November 1. That is a little over six months. Hillside and mountain gardens get fewer, and the hardiness zone range for the state (USDA Plant Hardiness Zone Map, 5a to 7a) shows how much the cold varies across the map.
A window that size allows more than one sowing. A gardener in the Kanawha Valley can put in a spring crop, pull it before midsummer heat, and still have the whole of late summer to start the fall planting. That second sowing is the one that usually pays off. In a cold pocket where spring comes late and fall comes early, there may be time for only one good sowing, and it is better to choose the fall slot over the spring one.
Succession sowing works well with fast crops. Instead of one long row, sow a short stretch every couple of weeks through late summer, so the harvest comes in pieces and not all at once. The succession sowing guide on this site gives spacing between plantings. A bonus of staggering is that a flea beetle outbreak or a hot week rarely wipes out everything.
Window length also settles the transplant question. In a long season, direct sowing is usually the easier choice. Asian greens resent root disturbance, and a transplant that was root-bound in its cell stalls when moved. In a short season, or when a late-summer bed is still occupied by beans or squash, starting seedlings in cells makes sense. Check the roots when you pop one out. White, loose roots going down mean it is ready. A tight coil circling the bottom means it has sat too long. Tease the coil apart gently before planting, or sow fresh.
Neighboring states with similar valleys have comparable windows. For a comparison, see Growing Asian Greens in Kentucky and Growing Asian Greens in Missouri.
Heat and water in West Virginia
Asian greens belong to the second half of the year. Summer heat is mostly a problem to get around, so the two numbers that matter more are the first fall frost and the winter low. The first fall frost, October 18 to November 1 at Charleston, sets how late a sowing can still finish. The winter low decides who survives after that. The mean daily minimum of the coldest month at Charleston is 26.1 F. That is cold enough to end tender types such as most pak choi and napa cabbage, but it is within reach of the hardier ones when protected.
Under a low tunnel or a layer of row cover, tatsoi, mizuna and many mustard-type greens can stand through the winter in the valleys. A hard freeze below the mean can still finish them, and the same plants on a ridge face colder nights than the Charleston figure suggests. The practical rule is to treat the first hard freeze as the end for tender types, and cover the hardy ones if you want to keep picking.
Is summer heat a problem for Asian greens in West Virginia?
Mostly for the spring crop. Valley summers are warm and humid, and a spring sowing that reaches maturity in that weather tends to bolt, turn bitter, and invite flea beetles. Late-summer sowings face the same heat while they germinate. Shade the seedbed with a light cloth, keep the soil moist until the seedlings are up, and the plants grow out of the heat as the nights cool.
What does rain do to the crop?
Summer rain in the state is regular, and the larger risk is wet leaves. Dense, humid plantings invite downy mildew and leaf spots, and slugs love a damp canopy. In cool, damp mountain summers the same problems appear, along with slow growth. Water at the base in the morning so the leaves dry quickly, give plants room for airflow, and avoid replanting into a bed that held cabbage-family crops the year before. Asian greens are brassicas too, so they share clubroot, cabbage worms and black rot with cabbage, kale and mustard, and rotation only works when you count the whole family as one crop.
Which Asian greens suit West Virginia
Choose by type, and let your conditions set the criteria. A moderate season with a long fall favors fast types that finish before the freeze. Humid summers make disease resistance the first thing to read on a seed packet. Hot spells favor types that tolerate heat and have some shade or airflow around the roots. Here is how the common types compare.
| Type | Cold tolerance | Bolting in spring | Best slot |
|---|---|---|---|
| Tatsoi | High | Moderate | Fall and covered winter |
| Mizuna and mustard greens | High | Moderate | Spring and fall |
| Komatsuna | Good | Lower than most | Spring, late summer, fall |
| Pak choi | Moderate | High | Fall, or early spring |
| Napa cabbage | Moderate | High | Fall only |
Variety names are left out on purpose. Which cultivars do well depends on elevation, humidity and local disease pressure, and the only recommendation worth following comes from trials run near you. West Virginia University Extension and your county office can point to the varieties that have performed in the state and the ones that bolt or mildew. Seed catalogs describe resistance in general terms, so match their notes against the local advice.
For a first year, a small mix is a safe approach. Plant a fast spring type, a heat-tolerant type for late summer, and a hardy one for the fall bed with a cover ready. Harvest leaves young, since mature plants hold on to flavor only briefly in this climate.
Common questions
When should I sow Asian greens in West Virginia?
Sow a quick spring crop once the soil is workable, around the April 9 to April 23 last-frost window at Charleston, and later at higher elevations. Sow the main crop in late summer, counting back from a first fall frost between October 18 and November 1 at Charleston.
Will Asian greens survive a West Virginia winter?
The hardiest types, such as tatsoi and mizuna, can come through under a low tunnel or row cover in the valleys. The mean daily minimum of the coldest month at Charleston is 26.1 F, and colder nights are common at elevation. Pak choi and napa cabbage usually end at the first hard freeze.
Can I rotate turnips or Asian greens into a bed where I grew cabbage?
No. Turnips, rutabagas and Asian greens are brassicas, and they share diseases and pests with cabbage, kale and mustard. Count every one of them as the same family when you plan the rotation.
How do I check harvested roots such as daikon or turnips before storing them?
Look over each root and the crown. A soft patch, a weeping spot or a moldy crown means the root is out, and a firm look elsewhere does not make the rest safe. Keep roots dry and cool, and recheck them often instead of trusting a fixed storage time.