Changed my nutes to flowering ( ^P) and flowering leaves turned from Green to yellow in one single day! May have been low pH so I flushed and re-watered with previous nute solution. Hopefully OK now.
What happened? Low pH causing Mg/Mn lockout? Too hot Nutes? Other?
Please see photo.
What happened? Low pH causing Mg/Mn lockout? Too hot Nutes? Other?
Please see photo.