Harvest the heads as soon as they are mature to ovoid bolting. Cut at the plant base and store in a cool area
Try to plant in a location that enjoys full sun and remember to water often. Keep in mind when planting that Black summer pac choi is thought of as tender, so it is really important to ensure that the outside temperature is well above freezing before planting or moving outdoors. Black summer pac choi needs a loamy soil with a ph of 6.1 to 7.8 (weakly acidic soil to weakly alkaline soil).
Look to ensure a distance
9.75 inches (25.0 cm) between seeds when sowing - bury at a depth of at least
0.39 inches (1.0 cm) deep. Soil temperature should be kept higher than
18°C / 64°F to ensure good germination.
By our calculations, you should look at sowing Black summer pac choi about 14 days before your last frost date.
Direct sow in early spring or start indoors 2 weeks prior to the last frost. Transplant outside after danger of frost has passed.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Black summer pac choi is a tender plant.
By our calculations, you should look at planting out Black summer pac choi about 14 days before your last frost date.