cercis chinensis saplings... winter care

I have several saplings that are now about 7months old and about 20cm high

have sat in my garage for most the year sat in front of a window

but autumn and winter is approaching, should i bring these into the house or will they be ok in the garage?
will get a little cold in garage but would be ok against frost..... in UK

they would be deciduous but unsure if can survive at such a young age


hoping i can risk the garage?


ty

They can take a good bit of cold -- USDA Zone 6. That's to -20 ,degrees C.  I have no idea how that relates to low temperatures in Kent.

thanks

i read they can take low temps just wasnt sure if when saplings
but yes kent - the garden of England wouldn't go that cold

i will just move away from direct at window if frosts do appear in a couple of months

This species is hardy in the UK so I would leave them outside somewhere where they're not going to get wind or rain battered.