Which position is best for your plant
Plants for Hot/Dry conditions: Abelia, Artmisia, Cistus, Lavender, Geraniums,Helichrysum, Grasses (and other plants with narrow or silver leaves), Phormium, Santolina, Yucca, Red Hot Poker, Phlox, Verbascum.
Plants for Dry/Shdy conditions: Alchemilla, Aucuba, Berberis, Holly, Mahonia, Osmanthus, Prunus Laurocerasus, Pittosporum, Skimmia, Euonymous, Ivy, and dicentra.
Plants for Moist/Shady conditions: Astilbe, Aucuba, Camellia, Cornus, Elagnus, Gunnera, Hamamelis, Hellebore, Hosta, Hydrangea, Peris, Rhododendron and Skimmia.
Plants for Cold, Exposed North/East facing conditions: Berberis (Deciduous varieties), Buddleia, Chaenomeles, Cornus, Corylus, Cotoneaster, Eleagnus, Euonymous, Holly, Kerria, Hydrangea Petiolaris, Philadelphus, Potentilla, Spiraea, Camellia (North walls only), Garrya, Mahonia, Photinia and Viburnum.
If it is going to be difficult to give a plant the conditions it needs the best idea is to grow it in a container.