After almost 10 years one of the "containers" in our strata rooftop garden leaked so we had to excavate the entire area to repair the membrane. As a result all the plants were ripped out and I can't say that I'm unhappy because the developer had originally put in some of the cheapest, ugliest and unsuitable plants. So we get to start all over again which brings me to my questions regarding suggestions for trees, shrubs and groundcover. Some basic facts. 1. We do have an irrigation system. 2. Full sun with a south/southeast exposure. 3. 28 floors up. Will have to carry anything up the last two flights of stairs as the elevator doesn't go to the roof. 4. Downtown Vancouver. 5. Container is 19" deep, 10' wide and about 40' long. 6. Would prefer to have evergreens and annuals and would like to use some native plants. 7. Very interested in rhododendrons as I understand they are shallow rooting. 8. Trying to decide on a colour scheme of white and blues/purple or white and pinks. 9. Hoping to extend the season of colour as long as possible (aren't we all?) I realize that building the garden will not be an instantaneous thing and that as time goes on I may be able to establish some ferns and hostas in the shade that is created from the trees and shrubs. What would you do if it was your garden?