Q. Can you recommend small trees for a rooftop garden the containers are 4 ft x 2 ft x 2 ft. I would also like to plant mock orange, redvein
Consider the amount of weight your roof can support, exposure to sun, shade, wind and the type of soil mix/drainage before you decide what trees to plant. If you are unsure about the weight bearing, etc, contact a reputable landscape architect or designer before you proceed. Although rooftop gardens are attractive you want to make sure that they don't create problems in the future.