Hey This is my first plant. Afghan Kush Ryder. She is 44 days old ,14,4" tall, (35 cm) and is growing in a waterfarm hydroponic system, under a stupid 90 w LED UFO, and a 200 watt CFL. I keep her well ventilated with an inline fan. Maintain tempertures in the 70-75 F. /23-26 C. region. PH of 5-6. Humidity around 40 RH usually. I thought her yellowing leaves were signs of potassium def so I gave her a little Flora Series nutrients yesterday. I flushed her with tap an hour later, realizing that she is most likely burning, not asking for more food. Is it normal for a plant not to take any nutes at all at this age? Now all her fan leaves have yellow edges and burns. Will she recover any of the yellow edges, or are all her fan leaves crippled now? I concluded it was nute burn, what do you think? Is it normal for a plant not to take any nutes at all at this age?