Yah I don't put nutrients on my plants until 1 and a half or 2 months go by. Thats just what i do though. I grow outdoor though not indoor. Plants just seem to die when you fertilize them at a young age.dont put any nutes in the soil. get new soil cuz it is now tainted with nutes. I dont know what to say. I'm just being random. If you havent over fertilized them i dont see how they would die. Get new soil if ferts have been in it. Thats all i can think of.