Trollius Seeds and strange nasturtium
 

I have some trollius seeds which have just started sprouting in a tray
in a "cold frame" in the garden. Although we live in London and the
weather doesn't get too cold, what should I do with these seedlings -
do they need bringing indoors over the winter?

Also - on a different note - why is there a huge nasturtium in the
garden which started sprouting a few weeks ago? I thought these
things came up in the summer (although none did).

Thanks!

Glenda