Bok choy grows fast. Really fast. From a tiny seedling to a fully grown plant in just a few weeks! That means the soil needs to be packed with everything the plants need to thrive. No cutting corners here.
Before you grow bok choy, make sure the soil is nice and moist. Water a little at a time over several days so the soil has time to absorb it properly. But don’t overdo it—if the soil turns into a frozen block when temperatures drop, the plants won’t be happy. If you’re watering in a greenhouse during chilly weather, open up for some airflow. Cold water vapor hanging in the air can make the space even colder.