For flowering vines for a mild area in a shady location, I can offer the suggestions I used in my own garden - polyanthum jasmine and hardenbergia. Both are vigorous evergreen vines, the jasmine has small white and very fragrant flowers, the hardenbergia violet coloured ones. I have both planted in a North facing wall and they grow and bloom beautifully in our mild climate. Both flower for me around the February time frame, so this would qualify them for Winter flowering interest as well.

Maybe you could plant two of each in alternate sides of your harbour. Then underplant with bulbs that are in the same line of colours - blue and white yacinths, anemones, white daffodills, grape yacints, etc. By the time the trees canopies leaf out they should be done blooming. This would be a very smart two tone combination. If you prefer some contrast, add bulbs in contrasting colours, but I think the first option is more sofisticated.

As for something vertical in the hanging baskets, what about some miniature conifers? They won´t be too happy in the shade, though, so you might need to change them on a regular basis.

Eduarda

Eduarda, great ideas! I will get right on it! Thank you.