Greenhouse Germination - is it ok now?

Hi everyone, just starting out and trying to do some research on growing plants from seeds.

I have an array of hardy perennials and was wondering can i germinate them in my glass house outside this time of year as well as grow them there.

Most info i have seen says germinate them inside between 15 to 20 degrees c for up to 21 days. Not sure if i have the space, hence can they be placed outside in my glass house. i have several trays. Is frost an issue?

Also i have some sow direct outside hardy annuals, i was wondering is it worth me starting them in a tray in the glass house also? if that is acceptable, at the moment the ground is not ready and i was looking to gain a head start.

Any advice would be welcome.

Cheers chris.

 

As there are three copies of this thread can I direct replies here so we can keep a single main one going http://gardenerscorner.co.uk/forum/newbie-question-advice-t32097.html