Why do you not leave all your plants in the shed as it's mention light is not required?
Many thanks Wayne
Thats probably not a good idea for England..
all you need to do (In England) is
leave the plants outside all winter!
no shed, no greenhouse, no basement, no garage, no fridge required..
you are REALLY warm, zone 8, compared to those of us who have to do "the fridge method"..
In that case, putting the plants in the shed would probably be a bad idea because they might get
too warm in the winter..for a Zone 8 dormancy the plants should still get sunlight over the winter, because it wont be cold enough to stop all growth, all winter..
and being out in the sunlight, you wont have to guess when they should come out for the spring..they will just naturally come out of dormancy by themselves, when the time is right..
seriously..those of you in the UK..dont mess with sheds or garages or greenhouses!!
you dont NEED to!
just leave them outside 24/7/365..
yes, if you are going to get an unusual cold-snap..perhaps in the 20's F (negative 4 C) for a few days in a row, then sure, its good to move them somewhere for a few days, to protect them from extreme cold, but otherwise, just leave them outside..
the "no light required in the winter" theory is really only for those of us who are in Zone 6 or colder..those of us who use "the fridge method" and other ideas to keep our plants "warmer than outside"..where the plants spend ALL winter at 35 degrees F (+1C)..
in those temps, yes, you dont need light because it is SO cold that the plants arent growing..
but for zone 8, just ignore that completely..it doesnt apply to you..
Scot