Posted: Yesterday at 18:09
Hi Trixie. If you have a spot with free draining soil you could use Hebes. Lots of varieties of varying sizes and most are evergreen. Flowers are white through to purples. Don't rule out Potentillas because, although not evergreen, they have foliage for a huge part of the year and flower forever. I have white ones and they'll fit with any colour scheme but the soft yellows are also nice and will work with your Cotinus and other shrubs like Pieris and Forsythia. Mahonia (Charity or Winter Sun) are useful big evergreens with yellow candles of flowers late in the year followed by blue/black berries. It would do well on your boundary. There's smaller varieties too. Viburnum's another useful large shrub - lots of varieties available. I also have Osmanthus burkwoodii which has scented white flowers in early spring. Evergreen. Sarcococca ( Christmas box) is evergreen and has scented white flowers in winter.
I have low growing Gaultherias (used to be Pernettya) which have white flowers like the Pieris and red berries for this time of year. They like a little bit of shade but are happy enough with some sun if the soil's not too dry. Pachysandra terminalis is another low growing evergreen - also like a bit of shade. Nice little white flowers.
Hope that gives you a couple of ideas.