Brown edges late flowering

[Stimn11]

Leaves started turning brown around the edges. Now spots are forming too with some yellowing interveinal. Not sure what the issue could be looks similar to calcium or potassium in my opinion but could use help.

 

[Stimn11]

Ph has been steady 6.5 for entire grow and using blue planet high yield nutrient line up

 

[Lil Dab]

Ph has been steady 6.5 for entire grow and using blue planet high yield nutrient line up

@Stimn11 some more info would help I would start by filling this out hopefully someone more knowledgeable will be along shortly... The more info the better for the best answer also some whole plant pics help too. At first glance it almost appear nitrogen heavy

Please fill in this form: (copy and paste part is below, this first one tell what specifically to include)

-Problem: (brief description)
-Medium/grow method: soil; soilless-- coco, or peat based like Promix, etc. (please provide the actual product name); DWC, NFT, etc.
-Feed and supplements used: include brand, dosage/strength, frequency of feeding and watering (alone); method-- by hand, drippers, rercirc' or drain-to-waste,... N-P-K #'s too if you can!
-Water source: RO/DI; tap- dechlorinated-?..... EC or TDS reading; pH (don't bother with this on RO/DI, do bother with TDS/EC though to confirm it's working well enough)
-Strain and age
-Climate: night and day ambient T and RH%; res' temperatures; any extremes in T/RH% exposure
- Light used: HID, LED, COB, combo of,... wattage; light cycle hours (20/4, 18/6 , etc.); distance to tops....
-Additional info: How long have the plants been affected?...How fast did symptoms appear?... Anything else you think might be relevant..

--Pictures including WHOLE PLANT PICS, and troubled leaves.. use normal light or flash as other light sources ruin color rendering, critical for diagnostics!

✂ - - - - - - - - - - -
(copy and paste)-->

Problem:

Medium/grow method:

Feed: and supplements used:

water source:

Strain/age:

light used:

Climate:

 

[Mañ'O'Green]

The extra information will surely help.

Did your VPD get out of range? because the kind of lock-out I see can be environmental. It looks like too much nitrogen is locking out K. Or you don't have enough? Your plants look as though they may be overfed altogether?

 

[Stimn11]

I used ffof soil
Temp is at 75F
Nutrients used Blue Planet Organic High Yeild fed every other watering
Tap water ph at 6.5
Gorilla Cookies strain
Humidity has been a little high at times ranging from 55-75%
Spider Farmer 200W LED at 80% dim
Problem was noticed about a week ago moving pretty slowly from the top down I did a complete flush then resumed nutrient line up feed chart