Nutrient burn?

No, don't think you've burned it but you're giving it way too much grow nutes... Don't go by the "recommended" dosages as they will often overstate the amounts needed for our grows! You're in flower now an the flowering stage doesn't need a whole helluva lot of nitrogen which is heavy in the grow nutes... I would cut that back at least in half and by week 6 cut them out entirely. Meanwhile, you can be upping your bloom nutes. I'm wondering if you're checking the PH of your runoff? When you WATER, you should be getting about 20% runoff and the PH of it should be between 6.0-6.5. If you're measuring ppm, at this stage that should be about 700. Mid flower, ppm should be about 1000-1100 and final flower, 1100-1150. You'll be fine... just get that extra nitrogen out of the equation! Good luck and thanks for linking your diary! That really helps us help you!