Clubroot incidence and severity may be reduced by the application of agricultural lime at least four weeks before sowing. Harvesting, storage and marketing Pak choy are usually harvested by hand at the base 35 to 55 days after sowing. Pak choy should always be picked when leaves are fresh and crisp and before the outer leaves turn yellow. Any dead or damaged leaves are removed, the base is trimmed flush with the first petiole and the plant washed. Harvest should occur during a cooler part of the day.
Market prices are highest for green, turgid produce.
Whole plants or separated leaves may also be packaged in modified atmosphere plastic bags. The green-stemmed variety is often sold wholesale for use in bags of salad mix. Modified atmosphere packaging can increase shelf-life even further. Write to GPO Box 46, Brisbane, Qld.