Posted: 05/06/2015 at 12:10
To make it look tidier you could shape your ceanothus and hebe as it is crowding out the hydrangea. In fact you could give a little trim to all the plants. You could also put a decorative mulch like slate in a colour to match some of your paving. I'd keep away from bark as it could get messy. It would also make weeding, if any a much easier job.
Plantwise you could try choiysia. This is evergreen and you would get white flowers a couple of times a year. Or cornus (dogwood), they are deciduous but you then have the coloured stems as winter interest (red, yellow, green, brown, black, orange) and they have white flowers and also berries.