What to put in new plastic coldframe

[SiWard]

Hello Everyone,  Could those in the know please give me some advice on what I can put in my two new wall standing plastic coldframes/green house that I bought from Aldi today for £11.99 each.  They are being put into a very sheltered small garden in Cambridgeshire.  My windowsills are currently bulging with the usual seedlings for this time of year and I wonder what common ones can go in now they have sprouted, and what could go straight in after sowing.  Many thanks as allways for your help :)

[SiWard]

[Hyacinth]

Think the weather forecast's saying v. cold this coming week, so best kept indoors for the mo, I'd think. Always plant my french/runner beans in pots in my cold frames mid-end March time. Cheers!