Try to aim for a seed spacing of at least
9.75 inches (25.0 cm) and sow at a depth of around
0.39 inches (1.0 cm). For optimal germination, soil temperature should be a minimum of
18°C / 64°F.
By our calculations, you should look at sowing China express hybrid about 14 days before your last frost date.
China express hybrid is tender, so ensure you wait until all danger of frost has passed in your area before considering planting outside.
Napa cabbage, Brassica rapa (pekinensis group)