yes they will mine are in the soil bed of the gh now. they are doing well too, despite the frosts of the last few nights.

I dont have asoil bed and tomato plants getting big and needing potted on .

Do I need to use growbag mixtiure or can you just use multipurpose compost?

I have two greenhouse will move tomatos into unheated..

I'm hoping to put mine in the grobags today, they've been unheated now--- except for the sun--- for about 2 weeks but i'm careful with watering, draughts etc. until they settle in

Scotkat - with growbags you plant straight into the bag, I suspect that's probably the only difference between growbag mixture and mult-purpose! Whatever you use, you'll have to feed your toms weekly once they set fruit.