I'm new to this (both the forum and hydroponics). I've "built" a 4 Dutch bucket system exactly to the MHP Gardener's specs and it's ready to go. I have 4 tomato plant seedlings in 1" rockwool cubes (foil still on) that are between 3 and 5 inches tall, all with true leaves. My buckets use Perlite as the
growing medium, and the
nutrient pump and air pump are on a 3 times a day timer. When is the ideal time (i.e. seedling size or root situation?) to move the cubes into the Dutch buckets?