Autoflowering Sick Plant Yellowing Leaves!... Can Anyone Help!...

LSD - 25 AUTO seed im currently the 3rd week of flowering and the leaves are starting to turn yellow!... I'm using Advanced Nutrients PH Perfect Bloom @ 2ml per litre and the PH is sitting at around 5.8 - 6.1 growing in coco medium temps are at 25c can anyone please help me out with what could be going wrong :[

did you grow those SOG method, short and a single cola?
atleast it looks like it, most autos atleast I think anyway are done in around 8-9 weeks.
which would mean you are currently in late flower period, the yellowing of the leaves is 100% normal it is the plant killing itself basically trying to focus its energy on bud production.
So all the sugars and left over nutrients are being sucked out of the plant in order for it to finish the budding period.
I would recommend you to start using your microscope and checking for the ambers.

Before ur next run in coco read my posts in these threads
https://www.rollitup.org/t/someone-help.891430/page-2#post-12110744
https://www.rollitup.org/t/i-need-help-with-flushing.890863/
https://www.rollitup.org/t/first-time-grower-on-third-cycle-seeking-wisdom-and-guidance.891608/#post-12116025
No ur genetics well.. knw your environment well. Invest in a decent e.c pen and pH pen keep them stored clean and properly keep probes moist..maintain run off and check the root environment e.c and pH every once in a whole or when things get problematic this is the key identifier if everything else is in check that is ..peace and respect bro

Kinda looks like you cooked em. Too much food maybe?

Over fertilised or lockout or both possibly,, the bottom leaves look alright a little tipping on them,, did you spray it with something?

Dopeleader hit it right leaves turn yellow exactly the way described it

You're definitely doing something wrong. Never saw one turn out like that and I grow a lot of autos.