Plants look like they are dying??

[BUSHYBUD]

This is a picture of a lemon kush plant one developed these symptoms in my grow tent another on a different plant outside.
Not sure ifs it's something I've done feeding or watering or a viral thing or not.

These plants are 4 months old and I have other plants around them not displaying the same thing but 3 that are.

 

[SativaBob]

Tell us more about your grow. What soil? How often are you watering and how much? What nutes if any are you using? Etc... with a little more info we can try to help :) something looks wrong for sure and since it's on an indoor and an outdoor it might be something in your process.

 

[GNick55]

there’s a few going on..
firstly looks severely overwatered?
root bound, needed or needs a transplant..
oh i got to go, sorry i’ll be back, but someone should help out.

 

[BUSHYBUD]

I'm using a 15% perlite 60 coco coir, and rest compost so it's quite a light mix.

Watering indoor plants every 2 to 3 days when pots dry out. Rain water normally.

For flowering plants I use 12.5 n. 25k 25p at rates on pkt or less.
Non flowring 7.7.7 liquid doff growmore.

This had worked well and have harvested 5 plants so far with no issues, flushed plants etc.

Odd the plants are in two different places I have other plants around them not showing any signs ones a northern lights looking at tag other is lemon kush.

Could I have over fed, 12.25.25??
I am looking to bring all plants into flower some I've started these were coming into house in next couple of weeksso can control environment better as lost too many to bud rot in laze July August here in UK.

Back to issue. Plants aren't left sitting in water, and water when dry maybe lightly damp if I'm working shifts then let dry out.

Had odd issue over summer not like this though so worried may lose my lks which seem to be the best plants I've grown as yet.

Any advice appreciated