I live in Port Hardy and have 2 Dogwood trees given to me by a friend from the Central Coast. Both of these trees live in seperate containers which are half of a 45 gallon tub and are in the shade half of the day. They both appear to be healthy and like where they live however neither one of them have ever flowered--do they need more sun or are they root bound and need to be taken out of the containers? Any suggestions would be helpful.