Growing a banyan tree requires a lot of space, as mature trees become quite large. This tree should not be planted near foundations, driveways, streets or even your home, as its canopy alone can spread quite far. In fact, a banyan tree can get up to about 100 feet tall and spread over several acres. The leaves of banyan trees can reach anywhere from 5-10 inches in size.
Read more at Gardening Know How: Growing a Banyan Tree http://www.gardeningknowhow.com/ornamental/trees/banyan/growing-a-banyan-tree.htm