When you decide to choose a large plant container to use for your trees, you have to think about the winds. Traditional large tree planter pots may not be as stable as straight sided planter. A planter with a narrow bottom is suitable when the shrubs and trees will not grow to be too tall. However, they should be trimmed to reach the correct height or they can be toppled over when strong winds blow. Trees planted in the pots are going to need more water compared to these that are planted in the ground. You may install the self watering unit which has a water reservoir found at the bottom of the container and it may replenish itself using a filler spout.