Baby bok choys belong to the cabbage family. They are the non-heading cousins of the regular green cabbage. They are easy to grow. They mature quickly, 30-45 days The key to succeed in growing baby bok choys is to pick the right variety for the right season. The secret is most baby bok choys, or cabbage family for that matter, are cool crops that only do well in the fall. There are special classes of baby bok choys or cabbage that can be planted in spring and summer successfully. These are the breeds either through hybridizing or special selection that acquired the traits that allow them to withstand the spring conditions. So if you are planting them in the spring or summer look for the varieties that are bolt resistant or specifically bred for spring.