Hello I have a single scrog girl scout cookies, 2 and a half weeks into flowering that is having a problem that I cant identify the cause of. about a week into flowering i noticed the edges of its leaves starting to get a yellowish tint to them and tips started to curl down. as the problem progressed the leaves started to turn black and die off. I am thinking that it is a problem with my PH i am using botanicare nutrients, and the first thing i did was move the 150 watt hps up a couple inches and flushed the rockwool cube and all my PH seemed normal when I tested my solution. Any info or constructive criticism would be very appreciated.
What's your temp? Looks like they may have been nute burned and had a little heat stress. What % did you start off feeding and what % are you currently at? Normally you want to start at 50% suggested then slowly bring it up.
What type of medium; soil or hydro? What brand and type of soil? Indoors or outdoors? What strain? How old are the plants? What type of lights and how many watts? How far from the lights? What is your watering frequency and source of water? What, how much and when was it fed? NPK? What is the medium/runoff pH and PPM if in hydro? What are the temps and humidity in the room? What size pots? Any bugs? Look real close. Any other pertinent info?