I have a sloping garden that is terraced near the top. The main terracing
consist of two walls, both of which are 5ft high and about 20 feet long.
There is a small bed at the top of each wall where I' like to grow plants
that would trail over the edge.

Can anybody offer any planting suggestions? Both areas are in full sun all
day, and I'd like something that is mid to late summer flowering.