All my plants are looking diseased. Help appreciated.

[Cyclone]

nope i don't smoke!! but there was someone staying here that smoked outside so...

Well I can't rule out the over fertilizing factor as I don't have any reference photos of what a posined plant looks like. The roots looked white and firm and weren't black or slimey.

[Millymollymandy]

I'm sorry you lost your plants, and can feel for you the frustration! Hope you have better luck next time. Can you buy small plants from your garden centres/ markets etc. there? Sometimes it makes more sense to buy these if you don't have a greenhouse or really suitable conditions for raising plants from seed, especially for plants like tomatoes and peppers.