Plants to go over a low north-facing wall
I'm looking for some advice about planting for the front of our house. We have a narrow (2' x 6') bed behind a low brick wall. Our house is higher than the road (you have to go up a few steps to get into the front garden) - so the wall is about 1' higher than the flower bed but drops down about 4' to the pavement on the other side. It is north facing and a pretty shady miserable place!
I am looking for some plants that are able to climb up the 1' wall from the flower bed and drape/trail down the other side of the wall to make it look less bare. Unfortuantely there is no earth on the pavement side so we can't grow any climbers up the wall on that side.
Other walls around have red valerian growing in them which looks lovely but I am not sure they would be happy on the shady side of the road. We are going for red/salmon/gold/cream colours if possible, to not clash with our virginia creeper growing up the house. Last year I tried trailing fuschias and lobelia which were happy and flowered a lot but couldnt get over the 1-foot climb to trail down the wall - they just straggled about in the flower bed
I am a complete novice with gardening so any advice would be greatly appreciated! thank you