evergreen

I would recommend Clematis Armandii, vigorous climber, evergreen and wonderfully scented white flowers in the Spring

Good choice Fleurdemai there are a few evergreen clematis I believe and with a little discerning choice there could be successional flowering. If you type in evergreen clematis on google you are away. The Plumbago MAY survive if its in a sheltered warm location and you are not in the north east of Scotland!!

I too would recommend a Clematis.... Clematis cirrhosa var. purpurascens 'Freckles' (I have one in my garden).

"The earliest of the winter-flowering clematis - each white bell is heavily spotted in seasonal cherry red - often out by Christmas and sometimes by November" (Val Bourne
Garden Writer)

Position: full sun or partial shade
Soil: fertile, well-drained, neutral soil
Rate of growth: average to fast-growing
Flowering period: December to February
Flower colour: cream
Other features: evergreen
Hardiness: frost hardy (needs winter protection)

Scented, bell-like, cream winter flowers heavily speckled inside with reddish-brown 'freckles' and glossy, dark-green leaves. This evergreen clematis is ideal for training over a sunny pergola or arch. This is the best way to appreciate the distinctive freckle-like markings, which are less visible when the plant is grown against a wall.

Garden care: No routine pruning is necessary. If the spread of the plant needs to be restricted prune immediately after flowering, cutting back overlong shoots to healthy buds. Apply a slow-release balanced fertiliser and a mulch of well-rotted garden compost around the base of the plant in early spring.

size: 2lt pot (60cm cane) £8.99 £7.99(http://www.crocus.co.uk/plants/_/climbers/clematis/clematis-cirrhosa-var.-purpurascens-freckles/itemno.PL00001564/)