[GaryPaula]

Is it too early to put my tomato plants in the lotty, they are about 12 - 18 inches high and are out growing the mini greenhouse?

[Kimberley04]

I'm aiming to put my tomato plants in the greenhouse for mid/end May.

They're currently happily growing sway on my windowsill, as some nights are still a little chilly for the greenhouse.

[Robster]

I reckon its a bit early if there is no protection for them.  The forecast for the rest of the month is a bit cooler than it has been.  So a bit of a risk.  Could do some and keep the others in that you have room for.  Or bring them indoors on a tray after repotting if you are allowed!

[mumofstig]

You can't put them outside untill the night time temperature is reliably above 10C minimum.
One night below this and you may as well start again.

It's a good idea to sow toms for outside a bit later than ones for the greenhouse, if you have no-where to grow them on

[GaryPaula]

Thanks for all your information. Have learnt NOT to plant tomatoes too early.