My seeds are in paper towel,after it germinate,I ll transfer it to Rockwood,when should I put it under the light?? And on the Dwc
You can put them under the light as soon as they germinate . just stick them in to a wet rockwool cube ( make sure to have correct PH) and put them under the light in to your t DWC system . Keep that rockwool moist ,add some water every 12 or so hours . I do not know what kind of light you have , but I had my seedlings under 600W ,light was about 10" away from the top. If you using cfl then keep it 2-3 inches away ,but keep in mind that heat control is very important .P.S.Some people might recommend different techniques but this is what I do and it works fine .