Growing Medium: Growstone GS-3 Coco Mix. Indoors in grow tent Strain: Northern Light Age: Around 3 weeks Light: Mars Hydro 300w LED 24" above plants Temps: 66F-79F First time grower having a few issues with my two plants that are around 3 weeks old. One is worse than the other. I am noticing progressive yellowing/browning of the lower/bottom leaves starting at the tips and spreading to the edges. I am feeding Flora series nutrients along with Cal-Mag and following this nutrient schedule: http://www.growweedeasy.com/sites/growweedeasy.com/files/coco-coir-flora-series-schedule.pdf This issue seems to be working it's way up the plants, starting first at the tips. I had been pHing my water to around 6.0 when watering. When I first noticed the issue, I had looked up the symptoms and thought it could be nutrient burn, so I flushed them with plain 6.0 pHed water. This didn't seem to alleviate the issue, so I purchased a pH meter to get an idea of my run-off pH. Upon testing my run-off, I was getting values between 6.8-7.0. From everything I've read, this seems too high for coco, so I flushed the heck out of my plants on Sunday, finally getting them down to around 6.0pH run-off. Yesterday, I resumed feeding nutrients, but the problem still seems to be getting worse. Any idea what my issue/issues could be here? Thanks.
Looks like light nute burn imo. They look good otherwise i would just lower nute levels and it should sort itself out in a few days. Good luck