Looks like all sorts of things... but If you want people to help man you need to list everything.. From lights to nutes...
600w hps , medium is canacoco with perlite , using coca A+B , cant tell ph level as i dont have ph stik to mesure it. Sent from my SM-G950F using Tapatalk
What is your feeding schedule? What pH do you feed with and what is the pH of the run off? Your coco looks dry and it should never be dry - adult plants should be fed everyday in coco. Do you feed to run off every time? Also I would remove the dead leaves because it attracts buds.
Dont know about the ph sorry , as im still waiting for ph meter to be delivered, i dont feed it every day as i was overwatering them a week ago , and no i do t ussuly feed them till the run off Sent from my SM-G950F using Tapatalk
Without a pH meter, not feeding everyday, and not feeding to run off in coco is a formula for failure.
Yes man there is listen to this bloke he knows his shit... And common sense, PH is a massive part of growing weed.. peace.