Figured this is a slow flowering pheno as many has said. Nothing wrong with plant all healthy. Starting to show bit of potash deficiency so upped k45 slightly. Still ik bud development stage hoping it will cruise by faster once buds has developed.
I did a bit of digging because some of my plants have done the same thing. They started to yellow and dry out a bit before they were ready.
I've come to the conclusion that it's a mineral deficiency, specifcially sulpher and magnesium, which plants seem to need alot of during flower.
I used some epsom salts (magnesium sulfate), just a pinch/liter( all natural, unscented) and it seemed to help. I used a little during Veg. just on water days and a little more during flower, just on water days, but not every time you water. Just my thoughts, hope this helps you out a bit๐๐..
Later!!
@northernMike, that is my thinking too. I did give extra minerals along the way but didnโt seem to do anything on mine. Im so sure its deficiency. thanks ill keep that in mind on next grow