Use a garden fork or tiller to loosen the soil 8 to 12 inches deep. Discard large rocks and vegetation clumps.
Mix 10-10-10 fertilizer with the loose soil, at a rate of 3 lbs. for each 100 square feet of planting space.
Use a garden hoe to create the desired number of rows. Leave a space of 18 to 30 inches between each row.
Plant the bok choy seeds 1/4 inch deep and water until the soil feels lightly moist.
Continue to water lightly when the top 1/2 inch of soil dries out.
Thin the seedlings when they are 2 to 3 inches tall. Leave a space of 6 to 12 inches between each plant.
Place 2 inches of mulch around the bok choy plants. Remove any weeds that emerge through the mulch by scraping over them with the side of a garden hoe.
Harvest the mature vegetables by first pulling off all damaged leaves from the outside of each head. Use a sharp knife to sever the bok choy at soil level.