I'm constantly getting this deficiency on the lower leaves a lot and the tips of the middle leaves are turning Brown also ??? I put less than 1/4 nutes recommend and I still have this problem Sent from my HTCONE using Grasscity Forum mobile app
this might be helpful. Don't want to give a opinion as I don't have enough information about your grow to make an accurate prediction. http://forum.grasscity.com/indoor-grow-journals/895565-saddest-grow-ever.html/page-10#entry20749648
Have a look through this, might help http://www.growweedeasy.com/marijuana-symptoms-pictures What type of water are you using? If it's distilled or RO it might be calcium deficiency...