My sweet peas, sown indoors about a week ago in individual pots, have
started to germinate. From what I can gather, they should now be put
outside in a cold frame with as much sunlight as possible, but I don't
have a cold frame, and the only bit of my garden that gets winter sun is
rather high up on a south facing wall.

My plan is to put them in transparent sandwich bags and hang them from a
shelf I have on that wall so that the plastic stays upright and doesn't
get flattened by wind or rain. This should give them 6" or so of growth
before I plant them out in March. I also have a serious snail problem
and hopefully they won't find their way into the bags.

Is this crazy or flawed in some way? I'm sure it is.