Tomatoes dying

  Hi everyone, I have 30 tomato plants which I have grown from seed, they are now in 3" pots with J.Innes potting on compost.  They where all doing extremely well until Sunday.  On Saturday being a lovely day I thought I would put them out in a sunny sheltered spot to harden off, so that what I did, I brought them in late afternoon and they where fine.  Done the same on Sunday, there was a little more wind about and the compost felt dry so I watered them, brought them in a couple of hours later, got up Monday moring and the leaves have gone from bright green to light green, drooping on most leaves.  Today disaster has struck the leaves are completly dying.  Am so upset.  Can anyone please shed some light on what I have done wrong.  Mandy.

Thanks Ivor, it looks like back to the drawing board for me.  My neighbour has said I can have some of his.  Next year I will be less hasty and pot in 5" pots instead. Mandy.

I have some in my green house and are doing ok but have been wrapping them in fleece every nite as we have had a couple of frosts over the last few days

They don't sound dead to me. Fingers crossed then

Could also be that you have over-watered them which wouldn't help with the cold night's temps. Not to late to start again..?