How to Grow Bok Choy: A Crisp Asian Cabbage in About a Month

GardenDraft Team · August 22, 2026 · Updated August 1, 2026 · 8 min read

Part of: Garden Planning Guides · Planting Calendar & Frost Date Guides · How to Grow Vegetables — Crop Guides A–Z

Bok choy is the fast, crisp Asian cabbage that goes from seed to stir-fry in just over a month. It's one of the quickest, most rewarding brassicas a gardener can grow — no head to wait on, just tidy upright bundles of white stalks and dark green leaves. The one thing to understand is that it's a cool-season crop with a short fuse for heat, so a little timing is the whole game.

Grow it cool — it bolts in heat

Bok choy does its best growing in the cool weather of spring and fall, and warm weather makes it bolt, shooting up a flower stalk instead of plumping up. Worse, a cold snap after a warm spell can also trigger bolting in young plants, so steady cool conditions are ideal. That makes the fall crop the easy one: sow in late summer and it matures into reliably cooling weather. For spring, sow as early as the soil can be worked and harvest before summer heat arrives, or stick to baby bok choy, which is in and out fast enough to dodge the heat.

Full-size, baby, and their cousins

Bok choy types sort mainly by size and stem color. Full-size white-stem types are the classic market bok choy — thick, juicy white stalks, a foot or more tall, wanting 45 to 60 days and real spacing. Baby types are bred to be dense and tender at 4 to 6 inches, ready in as little as 25 to 35 days, and they're the ones to grow if bolting has burned you before. Green-stem (Shanghai) types have jade-colored spoons of stalks, a slightly sweeter flavor, and generally good heat tolerance. All are the same species as napa cabbage and turnips, which explains both the fast growth and the shared pest list. If your goal is stir-fry greens with the least drama, start with a baby green-stem type in fall.

Timing from your frost dates

The catalog window for spring bok choy is one to three weeks before your last frost for direct sowing or transplanting out — it handles light frost easily and holds to around 22°F once established. For a jump on the season, start seeds indoors four to six weeks before that, and give transplants a week to ten days of hardening off. For the fall crop, count backward from your first frost: full-size types need their 50-odd days plus a couple of weeks of margin, so sow in late summer; baby types can go in shockingly late, four to five weeks before frost, and still make a crop. Because it matures fast and bolts eventually no matter what, bok choy is a natural for succession sowing — the catalog default is a fresh sowing every 14 days for as long as cool weather holds. Look up both frost dates on the planting calendar.

Sowing and spacing bok choy

Grow bok choy in full sun to part shade in rich, consistently moist soil. It's a fast, leafy crop that wants steady water and decent fertility to grow tender rather than tough and stringy. Direct-sow about a quarter to half an inch deep, or set out transplants for a jump on the season (it transplants more willingly than most root-forming brassicas). Space full-size types about 8 to 10 inches apart and baby types closer, around 4 to 6 inches. In a square-foot bed that's a 6-inch grid — four full-size plants per square — or nine per square for babies. Keep it evenly watered; drought stress is another thing that pushes it to bolt.

Germination is quick and strong (figure three-quarters of seed up within about a week in cool soil), so sow shallowly and thin early rather than letting seedlings crowd. Fertility-wise, this is a leaf crop on a deadline: work compost into the bed beforehand, and if leaves pale mid-crop, a drink of dilute liquid fertilizer sorts it out. There's no long feeding cadence to manage — the plant is done before a slow-release program would kick in.

Harvest whole or leaf by leaf

You have two good options. Cut the whole plant at the base once it's full and crisp (the usual approach for stir-fries), or treat it as cut-and-come-again, snapping off the outer stalks as you need them and letting the center keep growing. Baby bok choy, harvested young and tender at four to six inches, is especially quick and forgiving. Because the crop matures so fast, sow a fresh short row every couple of weeks using succession planting for a steady supply rather than a single glut.

Harvest in the cool of the morning for the crispest stalks, and get anything that's showing a rising center — the first sign of a flower stalk — onto the table that week; bolted stalks and flowers are still perfectly edible, just looser. In the fridge, unwashed bok choy in a loose bag keeps about a week. It doesn't store beyond that, which is one more argument for many small sowings over one big one. If a fall planting outpaces the kitchen, blanched stalks and leaves freeze respectably for winter soups, and a hard frost in the forecast is your cue to cut everything standing.

Watch the usual brassica pests

Bok choy gets the same pests as the rest of the cabbage family — flea beetles peppering the leaves with shot-holes, and cabbage worms chewing larger holes. A lightweight row cover laid over the bed at sowing keeps both off a fast crop entirely, which is usually all the protection a quick-growing bok choy needs. Aphids sometimes colonize the folds of stalks in warm spells, and slugs appreciate the same cool damp weather bok choy does — an evening patrol handles them. Two honest companion notes from the trial literature: a strip of glossy mustard nearby works as a flea-beetle trap crop, and nasturtiums concentrate cabbage aphids away from the crop. Rotate bok choy with your other brassicas (crop rotation) so soil-borne cabbage-family diseases never get a foothold.

Bok choy in containers

Baby bok choy might be the single best container vegetable: shallow-rooted, fast, tidy, and happy with part-day sun. A pot or trough 6 to 8 inches deep grows babies on a 4-to-6-inch grid; a 12-inch pot handles a trio of full-size plants. The only real risk is drying out, which flips the bolt switch fast in a warm pot, so water daily in mild weather and twice daily in heat — see container basics. A fall container by the kitchen door, resown every two weeks, keeps stir-fry greens within arm's reach until real frost. Find your spring and fall sowing windows on the planting calendar.