leaves dying

Is this your Critical Orange Punch? Whatever... it looks to me like you've got some root problems going on... Plastic pots aren't the best choice for growing weed - the roots need some oxygen getting to them, better aeration than plastic allows... If you've not been letting the pot dry out completely between waterings/feedings, then I think the roots at the bottom of the pot are starting to rot... If you can, try lifting the plant out of the pot a little bit - enough to get a whiff of the soil at the bottom... if it smells foul, you should probably try a re-pot into a fabric pot cutting away the dead roots as you do.... if this is an autoflower, she may not recover... Yeah, without more information, that's the best guess I can make here... Good luck!