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Crop Guide

How to grow bok choy

Brassica · Water-sensitive · Frost-tolerant

Primary source · UMN Extension
Bok Choy
Brad FerradaWritten by Brad Ferrada, who built Garzed · planting data from university extensions
Moisture range
40–60%
Days to maturity
45–60
Light
Growing Degree Units
600 · base 40°F
When to plant bok choy in your zone
Indoor-start, transplant and harvest dates calibrated to your climate.
See planting calendar →

Growing notes

Chinese cabbage and bok choy are fall crops best planted in mid-summer (July) so they mature in the cooler temperatures of September; they require consistent soil moisture and nutrients throughout growth, as inconsistent watering leads to poor texture, bitterness, and failure to form heads.

Harvest signs

For bok choy, harvest a few leaves at a time picking the oldest, largest leaves from the outside, or wait for the head to reach mature size (dwarf varieties about six inches tall, full-sized about a foot tall) and cut while the oldest leaves are still tender; harvest the whole plant before flowers open if bolting begins. For Chinese cabbage, harvest when heads feel firm and dense when pressed.

Planting referenceDepth, spacing, pH
Depth
one-fourth to one-half inch deep
Spacing
12 inches for dwarf varieties, 18 inches for full-sized heads (thinned to one plant every 12 to 18 inches)
pH range
6–7.5
Pests & diseasesflea beetles, imported cabbageworm, cabbage looper, and diamondback moth larvae, cabbage maggots, alternaria, +2 more
Common pests · 3
Flea beetles: Chew small holes in leaves; seedlings are most vulnerable to injury
Imported cabbageworm, cabbage looper, and diamondback moth larvae: Feed on the leaves; young seedlings and transplants are most vulnerable to injury
Cabbage maggots: Feed on the roots, injuring the plants and sometimes killing them
Common diseases · 3
Alternaria: Causes spots on leaves
Black rot: Causes yellow triangles on the edge of leaves
Clubroot: Attacks the roots, causing roots to be swollen and plants to be stunted

Companions & antagonists

Plant near:DillMarigold
Keep apart from:Tomato
Tip: Fast-growing cool-season crop — bolts in heat.

Common questions

How much water does bok choy need?

Bok Choy is water-sensitive — shallow roots and a steady thirst. Keep soil moisture in roughly the 40–60% range and don't let it dry out fully, or growth stalls and leafy crops turn bitter.

Can I grow bok choy in a raised bed or container?

Yes — bok choy does well in raised beds and is happy in a decent-sized container too, as long as drainage is good.

Does bok choy come back every year?

No — bok choy is an annual. It completes its life in one season, so you replant it each year.