In article , MC Emily
writes

Turning to your specific situation, if you think that sowing seed
of hardy plants (not necessarily cowslips) might become a regular
event in your life, then maybe it's time to cobble together a
coldframe.

OK, I'm interested in doing this but can I use clear perspex rather than
glass, for safety's sake? I have to admit to not liking glass at all, after
having an accident some years ago with a glass tumbler. I even have my wine
out of a perspex 'glass' now!!

yes you can. I use plastic bags.
--
Kay Easton

Edward's earthworm page:
http://www.scarboro.demon.co.uk/garden/