Hi there everyone! Im in the middle of my first indoor grow and till now everything worked out pretty fine. Over the last few days though my plant began to turn her stams and leaves black (see pictures). Is it just too much fertilizer ? I hope you can help me! Infos: sativa strain light is provided by a Growking 155W LED panel (Ive only got the blue part active now) the LEDs are in a distance of 40cm the humidity is at about 45% temperature is about 24-27 degree celsius growing in soil with a drainage layer used a 4-3-6 fertilizer for about a week now