20-20-20 is very strong for such young plants.
Water them to the point where the water runs out the bottom with plain tap water.
Test the pH of the runoff.
Check that it is between 6.5 and 6.9.
They are a LITTLE small to be feeding yet, and the first feeding should be with a much weaker fertilizer that is a real grow fert, such as a 6-2-2 mixed to half the recommended strength.
stinkyattic Reviewed by stinkyattic on . Babies are sick, need help !! If some one can help please !!! So i have them under flourescent tubes about 2-3 inches away, water when they get dried out(every couple days) and just yesterday gave them some 20-20-20 plant food with their water, they looked like this before i gave them food though,bottom leaves are dying off and it appears to be spreading up the plants.Any suggestions would be much appreciated, thanx !! Rating: 5