Whats wrong with my plants??

these dark spots started showing up and the leaves are turning yellow and dying. Any idea what it might be either cal mag, salt lockout, magnesium, manganese im just all over the place

How ye mate. I have been growing for a while now.and on pic 4 I have never seen that before. It's like a green algy on your plant.I'd flush her with water for a week then a high n number to help her absord light to heel.it's kinda spring time here in the UK is there any way you could get the sun and fresh air at her.if not check out growweedeasy.com hope you find the problem I'll keep an eye in the growbible for you mate

Hey man im in michigan and its still a little cold. So i should just flush and give high nitrogen?