Trees can grow to a large size or be stunted, depending on the species and environmental conditions. Consult your favorite tree or plant reference guide [PDF] and remember that the size listed is usually a maximum. If the species has the genetic potential to be big, and the site conditions are adequate, the growth accumulates over decades and the plant can become quite large. Large trees can provide greater benefits than small trees, but they can also become larger problems. Wood is very heavy, and falling branches and toppling trees can do considerable damage to people and their homes, cars and other belongings.