Bok choy can be grown in the spring, summer, and fall, though they grow best in cooler temperatures (60 - 75°) which makes them ideal for fall planting (8/30). Direct sow seeds outdoors 4/15 - 8/30. Sow seeds 1" apart, 1/4" deep, in rows spaced 8-12" apart. Thin to 1 plant every 4-6". Sow every 2-3 weeks for continuous harvest. Alternatively, start seeds inside. Keep well watered during hot weather. It can grow in part shade. Tolerant of light frosts.
Harvest individual leaves or whole plants as desired. Eventually the plants will begin to “bolt” (flower) and make seed. (See Seed Saving Instructions.)
Bok choy (Brassica rapa) is insect pollinated and will cross with other flowering Brassica rapa species such as mustard greens and Chinese cabbage. Isolation distance: ½ mile. Min. pop. size: 25 - 50. Collect seeds from the best plants once pods have turned from green to tan but before seeds have been released. Clean seed as a dry-seeded crop.