What's going on with this plant

I have this girl here she is in week 7 of bloom and the buds seem to be fine I have been checking for bud rot and I don't see any problems with the he buds the leaves are dying off . I'm using Advanced nutrients and it seems.s like everything is doing ok Except for the leaves dying. I Thought it was Cal mag deficiency but that's not it I checked ppm and they are perfect I just never seen the leaves die like that I've only been growing for 2 years I just can't figure it out maybe someone has any idea what's wrong or is it normal thank you in advance for any help
 

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Advanced Nutrients has several products, we need more details on your grow. When you checked PPM, what are the numbers from the readings? Have you checked pH? What are you growing in? Have you successfully used this same routine and products for past grows and harvests?
 
I'm growing in coco and perlite 70/30 with . Extreme micro. I'm using ph perfect connoisseur bloom and bud Factor x with I have overdrive that I haven't used yet and Flawless finish for the end. I have used almost all the different. Nutrients and advanced nutrients gives me the best Results the ppm was at 1100 when I checked it or 110 if you read it that way
 
Looks like a lockout or salt toxicity. I presume your 1100 PPM is the nutrient PPM. Have you measured runoff PPMs? You're mixing your nutrients with RO water?

I haven't personally grown in coco, I know it has some differences from potting mix. I've read you're supposed to water drain to waste to mitigate salt build up. That's how you water?

I'd probably also want to check coco's pH with a slurry test.

Perhaps someone else with more coco experience will chime in. Good luck!
 
Thank you that helped me a great deal I never thought about salt Toxicity I will check the pH with a Slurry .but you really have thinking about the salt buildup. thank you
At a glance I'd say maybe your letting the coco dryback a bit? How many times per day do you water? I have been growing my autos in coco/perlite and ill feed once a day in veg then twice per light cycle 18/6:with no issues and my max ec is 1.4 with the average 1.2 in flower.thats due to it being winter here so they are a bit slower to drink. Some growers will water feed several times per day. I'd say dryback plus high ec input would be the most probable cause causing your issue. But I am no expert and don't bother checking the ph of the runoff you will lose your mind just focus on ph input. Don't flush either I would up the frequency of your watering and drop your ec a bit and when your runoff ec is where you want it resume. Good luck. Here is a couple of autos I grew recently and I let the big girl dryback a bit to see what would happen and the leaves on mine look similar to yours. My current grow are 5 sour diesel autos and they are getting 1.2 ec with ph 6.3 in 3 gallon fabric at 2 water feeds per 18hrs. Good luck
 

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