Yellow leaves brown spots

I started flowering purplehaze crossed with northern lights about 1 week ago. i have switched from veg nutes to a bloom and catalyst. About 8 days into flowering i noticed a lot of fan leaves are turning yellow with brown spots. Is this normal? What if anything should I do?

No. you are abusing the flowering nutes.
cut off the nutes until next watering, or if using hydro setup lower by far the fertilizer emounts.

You should move GRADUALY to flowering nutes, building up to dose.
At week 1 of flowering you should give the plants 80% of what you gave them before flowering and 20% of whats recommanded for the flowering phase.


your leaves should be perky, green, lush, erect and healthy up until harvest, or at least until you flush to clean the plant a week before harvest.
healthy leaves - healthier plant - bigger yield.

If you finish up with a green healthy plant at harvest you know you did good.

Yep, as the above poster said (Though I couldn't say for certain, I'm no expert), it sounds exactly like nute burn. My plants did the exact same thing in miracle grow soil (damn slow release fertilizer).