Help.......flowering

Hello friends
What is my occasional problem?
They are in the fifth week of flowering and the rest of their breeds are far behind.

Lol

Grow info helps my friend so we aren't just guessing

It is very helpful if you add info about your grow in your questions. Grow medium, lights, ph,temp humidity etc. The more info you include the better and more accurate the information you are given will be.

Possible too much Sulfur? look this picture you might find your problem

Potassium deficiency to the max!!! And probably short on everything else.

You’re going to need cal mag. You’re in the window and already deficient on nutes.