Strain northern lights special Nutes general hydro flora series + Cal mag Ph 6-6.5 Three weeks flower Problem- well I got off work yesterday and I noticed that the fan leaves are developing these brown circles I have no clue what it could be any ideas and information is much appreciated.
Not one person knows what this is. It's seriously spreading this is my first grow and I have no other growers that I personally can ask any advice appreciated
Have you flushed yet it could be salt build-up. Also id aim the ph torwards the 6.5 end even 6.8. Your in soil right?
Did you test your runoff? Just as important. Check this chart out. http://growweedeasy.com/marijuana-symptoms-pictures just match yours with the pic of the problem. It's helped me alot.