what plants are winter hardy?
['Chimonanthus praecox. Although very much a background shrub in summer, this Chinese native makes a particularly fine display throughout winter. ... ', "Viburnum x bodnantense 'Charles Lamont' ... ", 'Sarcococca. ... ', 'Clematis cirrhosa. ... ', 'Cornus. ... ', "Prunus x subhirtella 'Autumnalis Rosea' ... ", 'Holly. ... ', 'Yew.']