Using a propogater as a cold frame?
Hello there, new to the forum ( and gardening) hope this is the right area to post.
hope you are all well
In early february I sewed some sweet peas, left them to germinate on a window cill.
they've been there ever since and are doing very well - my worry being they'll sucomb to shock once they're out outside.
I don't own a cold frame but was thinking of making a small one using an old wine crate and a propagating lid over the top. Either that or a glass panel from a photo frame. Would this work? I would prefer the propogating lid as it is higher giving more growth space,
finally with me sowing too early and not being able to plant them out till probably early may ( I live in the north east - on the north yorkshire / durham border.) when would it be best to start this process of hardening off? And if my coldframe idea would work would I be able to leave them out at night?
thank you, your advice would be greatly appreciated,