Indoor sowings - hardening off

depends on what vegs. you are growing. tomatoes/aubs/chillies might sulk but others (Whats left???) should cope well.

Your brassicas can go out into the cold frame and stay there, just remember to close the lid when sun goes down.  You don't want a late frost to damage them.

Squash, cucumber, pumpkins and the like needs to stay indoors for another 4 to 6 weeks before planting out as they are quite sensitive to the cold.

I'm currently taking my tomatoes outside during these balmy spring days and bringing them back in at about 6pm.  However, they were sown back in February and are quite well established.  Perhaps for smaller seedlings you should give a little more time to develop before leaving outside.
I'm growing these tomatoes: roma, 1st in the field, tigerella, red alert, black Russian.

Thanks- will need to find a pane of glass for the cold frame but will get some brassicas going in there asap!