Rockwool clones are a week old and one has roots coming out the bottom. Corner of dome is slid open for the first time. Perlite is underneath the clones so the roots can get longer before transplant. My question is should I feed them and how? Going to use a mild Lucas formula but I don't know exactly how to go about feeding the one clone that rooted. Do I mix the Lucas solution in a spray bottle and spray them? All the clones are turning yellow and hungry. I'm surprised I couldn't find the answer when I searched on google. This stage of feeding is like a big secret or something. The cubes are pretty much bone dry with one misting a day and they are hungry. Should I just folier feed with a mild Lucas solution? Advice on the stage is highly appreciated.