the leafs are starting to go purple picture inside posted this before got no help

as you can see

i was told it was the cold but if it is the cold is that a bad thing for the buds because i think the buds are turning purple too so can you guys tell me will it effect the potency of my marijuana? or taste of anything?

another thing i thought of was to much nutrients?

does the directed dose of plant food have to be more dilluted for marijuana?

is it a good idea to use manure when budding? plz help im so fucking lost...

Unless you're growing a purple strain, then yes, it is most likely caused by the cold night temps. Anytime temps get too cold, it will stress the plant, and it will effect potency. As for manure, I would put down the shit and stop by a hydroponics shop to get some good nutes. Your plants, and your nose will thank you.