Magnolia trees grow approximately one to two feet per year. The rate of growth depends on the species and the climate, with Magnolias in warm southern climates growing more quickly than those in the northern parts of their range. They may require extra watering during winter droughts for ideal spring growth.
Magnolias are grown as shade trees and for their decorative value, as many have conspicuous flowers. The larger species can reach heights of 80 feet with a spread of 40 feet, but gardeners with limited space can choose smaller species with a maximum height of 25 feet. Magnolias do best in rich soil with plenty of moisture.