Pak choi

Brassica rapa subsp. chinensis

Faster money than kale, more heat-sensitive than lettuce. Tipburn if VPD is slack.

System

NFT, DWC

pH

5.5–6.5

EC

1.2–1.8 mS

Days

30–40

PPFD

200–350

Air temp

16–22°C

Protocol

1. 01Transplant small — oversized plugs bolt.
2. 02Keep nights cool. Heat makes it go bitter and tall.
3. 03Watch flea beetle if you ever vent unfiltered air.