yellow and brown

Hey guys, Started a grow in southern europe about 5-6 weeks ago. Seedlings have been doing ok, but have taken a turn for the worse.. Started to get very yellow leaves and brown spots, really not looking to healthy. Hoping some OG's here will take a look at these for me and tell me where im...

Leaves on this one have some dark spots with yellow/ other discoloration and leaves are canoeing on newer growth and clawing on lower leaves?

Can someone please help me out? I just started getting these deficient leaves on my plant. I feed it nutrients from general hydroponics. At first I wasn’t feeding it florabloom because someone told me the plant doesn’t need it in veg but the leaves started turning so I asked around and found out...

So for a week or two now I’ve been fighting yellow and brown spots on one of my plants. I must be misdiagnosing it and just all around making things worse. I know brown tips are over fertilizing. But what’s causing these other spots? The last two pics (with the more yellow leaves) were taken a...