How tall is the wall, Wendy? I ask because there are some climbers which might give you a backdrop ,if the wall is high enough.
Welcome to GoY! There will be lots of help here.

i have astilbie and ferns plants in my shady bit. but im sure there will be plenty of other suggestions ..:-)

Hello and welcome to Goy Wendy Clematis does well to.

I have clematis that is in shady areas and do great and you can grow clematis in pots

Use trellis or canes with them .

Sweet peas

Post us a photo of your wall please so we can help with ideas.

Hi Wendy,

I have a very shady part in my garden and I have planted Daisy, Highland dream. Its a fab plants which spreads, grows to about knee height . It has amazing white flowers on all through summer and looks ever so pretty.

They make a stunning show Marion.

Begonias (the big ones)will make a good splash of colour in pots. If you are interested in bedding plants some troughs of little fibrous rooted begonias will flower all summer whatever the weather. The shrub Euonymus fortunii Emerald 'n Gold will make an evergreen patch of colour, though with not even half an hour of sun the variegation might not be as bright as it might be.It will live happily in a pot for ages if you increase the pot size as it grows.

Look on the website of Long Acre plants. They specialise in plants for shade and will also give you advice. You haven't put your location on your profile, but if you happen to live in North Wales then Crug Farm Plants also specialise in shade but don't do mail order.