Hi Edd. Yes, it was shsattering but we did have a -32C that January. Lost some roses and clematis too and nearly every stem of a huge Kiftsgate but it has now recovered and regrown. I haven't planted new large trees as, somehow, a self sown oak has arrived where the nothofagus was and I'm letting that be for now.
Deciduous forms of viburnum are just about OK but I've mostly been planting colourful stemmed cornus and hydrangea paniculata forms which stand up - so far - to anything we get here although even those were clobbered and defoliated by a freak hailstone tornado last May.
I think maybe when OH retires at the end of next year we'll be looking for a more sheltered garden to nurture.