Clear a site in a sunny location. Remove weeds, grass, rocks and other debris.
Make a shallow furrow 1/4 inch deep. Space multiple furrows 8 inches apart.
Sow the pechay seeds in the furrow 4 inches from one another. Cover them with a fine layer of soil to refill the furrow.
Install a soaker hose 2 inches from the seeds to provide gentle irrigation. Water the seeds right after you sow them. Keep the seedbed moist to promote germination.