Brassicas
45-50days to harvest
4-7days to germinate
Z5–11USDA zones
Easydifficulty
F1 hybridContainer friendly

Sowing

Direct sow or transplant. For spring crop, sow 2-3 weeks before last frost. For fall crop, sow 10-12 weeks before first frost.

Cultivation

Sun
Full sun to partial shade (4-8 hours)
Water
High — consistent moisture needed
Soil
Rich, well-drained soil high in organic matter
Soil pH
6.0-7.0
Spacing
6-8 inches
Height
3 feet
Season
Spring, Summer, Fall

Appearance & flavour

Colour
Dark green leaves with bright white stems
Size
8-10 inches tall, 6-8 inches wide
Shape
Upright rosette with thick, spoon-shaped leaves
Flavour
Mild, sweet cabbage flavor with crisp, juicy stems

In the kitchen

Stir-fries, soups, salads, steaming, braising, kimchi, fresh eating

Pests, disease & resistance

Pests
Flea beetles, aphids, cabbage worms, diamondback moth
Diseases
Clubroot, black rot, downy mildew, white spot
Resistance
Good resistance to bolting and tip burn

Planting calendar by USDA zone

ZoneStart indoorsTransplantDirect sowHarvest
1April – MayJune – JulyJune – JulyJuly – September
2April – MayJune – JulyMay – JulyJuly – September
3March – AprilMay – JuneMay – JuneJune – October
4March – AprilMay – JuneApril – JuneJune – October
5February – MarchApril – MayApril – MayJune – November
6February – MarchApril – MayApril – MayMay – November
7February – MarchApril – MayMarch – MayMay – November
8January – FebruaryMarch – AprilMarch – AprilApril – December
9JanuaryFebruary – MarchFebruary – MarchMarch – December
10JanuaryFebruary – MarchJanuary – MarchMarch – December
11JanuaryJanuary – FebruaryJanuary – FebruaryFebruary – December
12JanuaryJanuary – FebruaryJanuary – FebruaryFebruary – December
13JanuaryJanuary – FebruaryJanuary – FebruaryFebruary – December

Companion planting

8 beneficial pairings indexed for this variety, 3 to avoid.

DillAttracts beneficial insects like parasitic wasps that control cabbage worms and aphids
OnionsRepels cabbage root maggots, aphids, and flea beetles with their strong sulfur compounds
LettuceProvides ground cover, conserves moisture, and doesn't compete for nutrients
SpinachSimilar growing requirements, efficient space usage, and harvest times complement each other
CarrotsHelp break up soil for shallow bok choy roots and don't compete for space or nutrients
NasturtiumsAct as trap crop for flea beetles and aphids, protecting bok choy from pest damage
CilantroAttracts beneficial insects and provides pest control without competing for root space
ChivesNatural pest deterrent against aphids and cabbage worms with their onion-like properties

Avoid

TomatoesHeavy feeders that compete for nutrients and may stunt bok choy growth
StrawberriesCan harbor slugs and snails that damage bok choy leaves
Pole BeansCreate too much shade for bok choy which needs consistent sunlight for proper growth

Nutrition (per 100 g)

Protein (g)
1.02
Fat (g)
0.234
Carbohydrate (g)
3.51
Fibre (g)
1.26
Vitamin C (mg)
30.3
Folate (µg)
68
Calcium (mg)
61.9
Iron (mg)
0.439
Magnesium (mg)
13.6
Phosphorus (mg)
30.5
Potassium (mg)
228
Zinc (mg)
0.274

Where to buy seed and equipment

Some links are affiliate links. If you buy through them we may earn a commission at no extra cost to you.

Growing it? There is a full cultivation guide at the brassicas growing guide.

Cultivar facts compiled from public horticultural references including USDA GRIN and NC State Extension. Descriptions are original to this catalogue.

DarkGrow forum

Grown Bok Choy 'Joi Choi'?

Post a crop report — day counts, reservoir readings, what worked. Variety-specific logs are the most useful thing on the forum.

Similar varieties

Other brassicas with a comparable time to harvest, so a season that suits Bok Choy 'Joi Choi' suits these too.

Browse all 79 brassicas