[richyrich7]

3^oC would be worrying IMHO anything lower than that then I know they definitely need extra care however they could do with really not going below 5^oC these kind of temp's probably wont kill them but could check their growth.

Oohh, now you've got me worried. when you say cold will check their growth is that just a temporary thing that will pass when they get warmer, or does it have a long-term effect on them?
i ask because i've had my tomato plants outside in a pot all night since they came up a couple of weeks ago. i'm in spain so it's not so cold, but i reckon it must have got down below 5º a few times at least. they look ok, although they are growing quite slowly. will they be ok?

Bit difficult, but if you have no frost then yes they should be fine, when you get a check in growth it tends to put them back growth/fruiting wise a week or so. Some plants it would encourage them to bolt like brassicas but tomatoes you'll just delay the time till 1st fruiting, they could possibly catch up again with your lovely warm weather.

we have a few growers from Spain perhaps they could shed more light on it for us ?

[rivkele]

Thankyou, you've put my mind at rest. i not really too bothered if they take a bit longer to fruit, as long as they get there in the end. Spring seems to have finally arrived in barcelona, so from now on they ought to get nice warm temperatures.