Alright so, this is my first grow, and my two plants are about 3 weeks old now. One of them looks perfectly healthy, but the other one hasn't been looking so hot since I transferred it last week; it suffered some root damage. Its leaves were very yellow and droopy for a while, which seemed to go away once I gave them a little more light. However, now the leaves are starting to droop and become discolored again, and there are a few brown spots on the lower set of leaves. I have not given my plants any fertilizer because I didn't want to give it to them too early. Any ideas on how I can save my plant?