Whoops ! That was meant to be a smiley. How do you include them on this board?

Thank you very much, Old Herbaceous, for all the info. I shall be growing from seed, so shall try to get everything perfect for them.posting.php?mode=reply&f=4&t=8220&sid=c018a8468a4afda49757feec93854cbf#

I grew onions for the first time last year and quite a lot of them went to seed. One of the "good ole boys" on the allotments told me that it was cold weather which would make them do that. Is that so, and when should I plant them out?