Plan to plant Napa cabbages during appropriate seasons. Blues and Orient Express cabbage can withstand springtime warmth. China Pride cabbages, on the other hand, tolerate the coolness of fall better. Optiko cabbages adapt well to spring and fall.
Dig a hole and plant Napa cabbage seeds shallowly, no more than 1/2 inch deep. Place the seeds at least 18 inches apart.
Water crops frequently. Chinese cabbages require plenty of water to flourish. These plants should be kept in an area with moist, well-drained and nitrogen-rich soil.
Make sure the cabbages remain in slightly acidic soil. Conduct a soil test to find out the pH. Napa cabbage grows optimally between the pH of 6 and 6.5.
Prevent diseases. Napa cabbages are susceptible to diseases such as anthracnose, black rot, wire stem, nematode and southern blight. Common remedies for these diseases include fungicides such as Bacillus subtilis, neem oil and azadirachtin.
Treat Napa cabbages with insecticides. Insects also pose a problem for Napa cabbage. The aphid, cabbage looper, cabbageworm, flea beetle and root maggot are attracted to these plants. These insects can be controlled by using insecticides such as neem oil, pyrethrins and azadirachtin.
Harvest Napa cabbage by cutting the plants from the base using a sharp knife. Depending on the variety, harvest time for Napa cabbages occurs in the early summer or late fall.