What zone are you located in? Are you looking for plants/shrubs that can be planted in the ground or in containers (I think that there may be a bed there for plants to go into - but I wanted to check). Annuals or perennials?

Hi I am on Cape Cod Massachusetts. I would like to use small shrub -3ft in height at the most not ground cover plants.

Would like to have a little buffer. Maybe also dwarf fountain grass?

Thank you

Will the coping be wide enough to sit on without squashing the plants? A 3 foot tall shrub could be as wide as your bed.

You might want to check your local nurseries for plants and shrubs they have for your zone.

It’s a long area. You might want to add some architectural interest such as an Armillary Sphere, statuary or bubbler fountain. Dwarf Liriope pretty plant and not too messy