Aquaponics FL

Crop lessons · Brassicas (cabbage family)

Growing Chinese cabbage (napa, Michihili and bok choy) in Florida

Brassica rapa (heading types var. pekinensis; open-leaf bok choy types subsp. chinensis) · Brassicaceae (cabbage family)

Chinese cabbage is easy to grow and comes in two forms: heading types such as napa and Michihili, and open-leaf types such as bok choy. It transplants well and has a long fall-to-spring season in central and south Florida. As with cabbage, start with clean plants to avoid black rot.1, 2

When to plant chinese cabbage (napa, michihili and bok choy) in Florida

RegionMonths on the UF/IFAS calendar
North FloridaJanuary transplant · February transplant · September transplant · October transplant · November transplant · December transplant
Central FloridaJanuary transplant · February transplant · March transplant · April transplant · September transplant · October transplant · November transplant · December transplant
South FloridaJanuary transplant · February transplant · March transplant · April transplant · September transplant · October transplant · November transplant · December transplant

Months follow UF/IFAS Gardening Solutions, "What to plant by month"; "transplant with care" is their wording for crops that resent root disturbance. Not sure of your region? Find your county.

Planting1, 2, 3

How to starttransplant (easily transplanted)
Seed depth (inches)¼ to ½
Spacing in the row (inches)14 to 18
Between rows (inches)14
Days to harvest70 to 90 from seed; 60 to 70 from transplant

Planting dates (SP 103 and Gardening Solutions agree): north Aug to Feb, central Sept to Apr, south Sept to Apr. The commercial handbook (CV122) spaces smaller open-leaf types closer, for example 6 to 10 inches for baby bok choy.

Varieties UF/IFAS lists for Florida1, 2

  • Michihili
  • Napa
  • Bok choy
  • Baby bok choy
  • Pak-choi
  • Joi choi
  • Toy choi (pak-choi hybrid)

Growing2, 1

SunPlenty of sun (Gardening Solutions). Full sun. SP 103 advises a garden spot with at least six hours of direct sun a day (general advice, not specific to this crop).
Soil pH5.8 to 6.3 (SP 103's general target for vegetable gardens on sandy soil; no change is needed anywhere from 5.5 to 7.0). No crop-specific figure was found.
WaterWater early in the morning so leaves dry in the sun, which helps prevent fungal diseases.
FertilizerSP 103 notes that leafy crops such as lettuce, kale and collards benefit from side-dressings of a nitrogen fertilizer during the season (general advice for leafy vegetables).

Frost can damage leaves; frost cloth helps on cold nights.

Pests and diseases in Florida2, 3

  • Black rot: Buy clean plants; early signs are stunting, yellow leaves and blackened veins.
  • Caterpillars (diamondback moth, cabbage looper, imported cabbageworm) and aphids: Chinese cabbage is included with the cole crops in the commercial Vegetable Production Handbook (CV122) pest tables.

Harvest2, 4

Ready 70 to 90 days from seed or 60 to 70 days from transplants, depending on variety. Bok choy and napa keep from a few days to about a week in the refrigerator; wrapping bok choy in a damp cloth or paper towel helps (FY1548).

In an aquaponics system5, 6

well suited

SRAC 454 lists Chinese cabbage and pak choi among the suitable crops for aquaponics and advises a feeding ratio near the high end of the 60 to 100 g/m²/day range for larger plants such as Chinese cabbage. The FAO manual counts pak choi among the low-nutrient-demand leafy greens and notes Asian cabbages do well in warmer water (22 to 29 °C).

What this lesson doesn't cover yet

  • No Gardening Solutions page devoted to Chinese cabbage exists; facts come from the cabbage page, which covers both.
  • The commercial handbook (CV122) spells the variety name 'pekinsis'; FY1548's 'pekinensis' was used. FY1548 also writes bok choy as var. chinensis where CV122 has subsp. chinensis.

Your county extension office and its Master Gardener volunteers can fill these in for your garden.

Sources

  1. Florida Vegetable Gardening Guide. UF/IFAS Extension, EDIS, SP 103. Read 2026-11-02.
  2. Cabbage. UF/IFAS Gardening Solutions. Read 2026-11-02.
  3. Vegetable Production Handbook of Florida, Chapter 6. Cole Crop Production. UF/IFAS Extension, EDIS, HS724/CV122. Read 2026-11-02.
  4. Healthy Harvest: Florida Brassicas, Cruciferous Vegetables, and Leafy Greens. UF/IFAS Extension, EDIS, FCS3405/FY1548. Read 2026-11-02.
  5. Recirculating Aquaculture Tank Production Systems: Aquaponics—Integrating Fish and Plant Culture. Southern Regional Aquaculture Center (SRAC), SRAC 454. Read 2026-11-02.
  6. Small-scale aquaponic food production: Integrated fish and plant farming (Somerville et al. 2014). Food and Agriculture Organization of the United Nations (FAO), FAO Fisheries and Aquaculture Technical Paper 589. Read 2026-11-02.

Every fact above is restated in our own words from these documents, written 2026-11-02. Independent of the University of Florida.

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