Probably not where you are assuming that you have hardened them off. Definitely too early where we live another month to be on the safe side. Which brings me to a pet beef of garden centres and supermarkets selling bedding plants way before it is time to plant them out!

Well it got down below freezing in many places last night, even in the south - so not really. It does look like there will be 2 weeks (at least) of frost free (infact quite mild i.e. 5-10C) nights from this weekend onwards, and you hardly ever get frost after mid-May in your neck of the woods, so I would start hardening off this weekend, but if its forecast to get below 5C I would bring them in during the night.

I live on the south coast and yes its still too cold at night for my plants to go out at the moment - hardening them off in a cold greenhouse but the last frost date for our area is 1 May so wait till then.

My cold greenhouse is about 2 degrees warmer at night than outside, the problem I find is that in full sun it shoots up to 30+ in the day - I guess not that great for hardening things off?

I am putting things out side in the day and trotting them back in on a night.

Weatherwise during the hardening off process you put the plants out in the morning and take them in at night. You need to do this for a couple of weeks to harden them off. Leaving them in the greenhouse during the day is not hardening them off but encouraging them to grow lax.

yep that is waht I'm doing

Yeah you're right Moon_grower, I was just responding to the previous answer. Dont worry I'm hardening mine off traditionally.