5th week of flower Leaf problems

Lower leaves turning yellow is often an indicator of lack of nitrogen I am forever reminding growers that yes she does not need alot of nitrogen in her flower cycle but Nitrogen like potassium and Phosphorus is a mobile nutrient within the plant this means that it is in constant use by the plant so its needed regardless of which stage your at so what can you do well fortunatly for you being in later flower one dose of N should get her back to green and be enough to las the rest of the run but be causios of how much you add because being close to the end it will be quite hard to flush out afterwards I would add two more days to flush for this alone :) My best advice there bro anyhow you can use this to your advantage in the later stages but if your still looking at pumping her full of nutes then just throw some of your veg feed in :) you shoiuld have nitrogen already in your feed maybe shes not getting enough :) hope this helps bro :)