- For your third post, an evergreen honeysuckle. - Spring, summer, and autumn bulbs - look on GW site - Perennials like erisymum (perennial wallflowers) of different colours e.g. purple, pink and orange on same plant, yellow, mixed in with penstemons of different colours. Only thing here is they are not all long lived so you'd need to take replacement cuttings every other year or so but they're very easy, and free! - Herbs like lavendar and rosemary, definitely (different sizes, colours and there's a trailing lax rosemary as well as the upright). Also lemon thyme on the edges - also over the edges: aubretia, saxifrage,look for other hardy/perennial trailers - and for backbone/structure, a few smallish shrubs which are both evergreen and earn their 'living' by being coloured (photinia), variegated (euonymous), winter flowering (mahonia, verbena), etc. Kept small by easy pruning. Good luck and have fun. What a lovely project.