Choose firm bok choy stalks without brown spots and fresh leaves (not wilted).
Bok choy is ready to harvest as soon as it has usable leaves. The miniature varieties are mature at 6 inches (15 cm.) tall and the larger types grow 2 feet (61 cm.) tall. The baby varieties are ready in about 30 days and the larger ones are ready four to six weeks after sowing. Bok choy is a cabbage that forms no head. As such, you can cut a few leaves at a time or harvest the entire crop.
Store bok choy in a plastic bag in the crisper section of your refrigerator for up to a week. Wash immediately before serving.
Fat free, saturated fat free, cholesterol free, low sodium an excellent source of vitamin A and vitamin C and a good source of folate.