Is this amount of yellowing normal for 3 1/2 weeks flowering?

Any opinions? Seems to be yellowing kinda fast.

That is normal for an underfed plant.

Im feeding crazy bloom and standard 202020 mix at 150% dosage. I cant figure out wtf it is. Theres no nute burn or anything.

have you tested soil ph ??? probably out of wack would be my guess would probably give them foilar spray for quick fix before leafs pass the point of no return

What do you advise as a foliar mix?

And i have no idea on soil ph. Cant measure it.

Feeding at 150%bloom?!!! That's your problem. Your suppose to gradually add the flowering nutes, not cut off your veg and hit it 150% with bloom booster. Your gal is eating herself away. Patience is the key grasshopper.

Mon doesn't even add bloom til week 4-6 of flower depending on indica or satvia, not enough n in bloom for the beginning of flower.

Cassinfo is correct, plants are pulling out n eating themselves. To much p k affecting uptake of n.

Just use the 20-20-20 til week five and you might get it under control.