Trachelospermum is generally considered to be frost hardy down to temperatures of -5C (23F). However, as with many evergreens, it does prefer the shelter of a warm position where it is protected from cold winter winds, ideally south or west facing aspect. Try to avoid cold north and north-east facing positions. It is recommended the plants are covered with a layer of horticultural fleece during particularly cold snaps, just to keep the frost off. If the plants are very young they should be grown under cover for thier first winter as young plants are always considerably more vulnerable than mature specimens. The trachelospermum plants can then be planted out in late spring and will have the benefit of a full growing season to establish itself before next winter arrives.