Growth slows when the tree has aged to about 50 years old. The slowest growing cultivars were 'Little Gem' (Magnolia grandiflora 'Little Gem') and 'Majestic Beauty' (Magnolia grandiflora 'Majestic Beauty'). It is often used as a standout landscape … Other factors that affect the speed of growth of a magnolia include soil conditions and weather conditions. If you can’t irrigate it periodically, plant it in a spot where it will be in the shade for a few years, although they can also thrive in full sun, depending on the cultivar. Weather is the other factor: Though the magnolia is tolerant of heat, it still needs water in order to grow. 'Samuel Sommer' (Magnolia grandiflora 'Samuel Sommer') is a fast-growing cultivar that has bronze and green leaves up to 14 inches wide, and grows from 30 to 40 feet tall and 30 feet wide. In such areas, the growth of a Magnolia tree should proceed along at an average of 1 foot in height per year under normal growing conditions. Growth Rate: 24 Inches per Year. Plan the perfect garden with our interactive tool →, Kenneth W. Outcalt, USDA Forest Service: Southern Magnolia, US Forest Service: Magnolia Grandiflora Fact Sheet. The widely-planted 'Claudia Wannamaker' (Magnolia grandiflora 'Claudia Wannamaker') is a fast grower with a broad pyramid form. This large, stately, native North American evergreen tree with its large, beautiful, saucer-shaped, fragrant flowers is almost a Southern landscape tradition. Fast growing trees grow more than 24 inches a year. Annie Mueller is a professional writer and blogger. It has been selected as the state tree of Mississippi. There are three types of growth involved in measuring the speed of growth of a magnolia tree. Growth slows when the tree has aged to about 50 years old. Begin shaping the plant while it is young by selectively thinning side branches as needed to produce and maintain the desired growth … A very compact, upright grower whose shiny, deep green leaves have a heavy reddish-brown felt beneath. The Southern magnolia grows at a rate known as moderately fast in the gardening world; in normal growing conditions, it will average a full foot of growth in height every year. All the charm of a southern magnolia in a smaller size, the little gem magnolia is a popular ornamental choice for people living in hardiness zones 6 through 10. The magnolia prefers a rich soil with a good degree of moisture, such as that found along streams and in swamps. It is the only evergreen magnolia and typically grows to 60 to 80 feet tall with a pyramidal to rounded crown, a spread of 20 to 40 feet wide, and a trunk diameter of 3 feet. The fastest growing cultivars were 'Margaret Davis' (Magnolia grandiflora 'Margaret Davis) and 'Smith Fogle' (Magnolia grandiflora 'Smith Fogle'), based on total height, caliper (trunk width) and canopy width, with 'Smith Fogle' matching the overall winner 'Margaret Davis' on height and canopy width. The magnolia is a medium-sized tree, meaning that its full height ranges from 35 to 60 feet and its spread can reach about 15 feet around. Special features: North American Native Selection , Tolerates Road Salt , Waterwise , Year-round Interest Magnolia grandiflora, or Southern Magnolia, is a large, broadleaf evergreen, medium-sized tree that is noted for its attractive dark green leaves and its large, extremely fragrant flowers. To keep growth on track, remember that a magnolia tree needs water even during the colder winter months. Extreme winter drought can cause the tree to die back in winter. Large 6 to 8 inch fragrant white flowers dot the plant throughout the warm months. Southern magnolia is most often grown as a single-trunk tree, but it can also be grown in a multi-trunk form. The rate of growth will be slower in cooler climates. SOUTHERN MAGNOLIA, BULL BAY. Drought will diminish growth; during periods of drought, water your magnolia weekly until the ground around it is soaked. The Southern magnolia grows at a rate known as moderately fast in the gardening world; in normal growing conditions, it will average a full foot of growth in height every year. Further, the bike is thin and can be easily damaged by garden tools such as weed eaters or mowers. Southern magnolias grow from 1 to 2 feet a year, reaching 60 to 80 feet tall with canopies spreading 30 to 50 feet wide. Magnolias grown from seed, called seedlings, grow faster than cultivars, but their shape, leaves and the density of their canopies are unpredictable and highly variable. In spring, the tree has to do a lot of "catching up" to attain its former height; it may not produce any additional growth in height or spread for the year. 1). Longevity Greater than 150 years. The Southern magnolia grows at a rate known as moderately fast in the gardening world; in normal growing conditions, it will average a full foot of growth in height every year. A superb small specimen or accent in the landscape. If you want your magnolia tree to grow into a predictable shape and with the kind of leaves that you want, it's better to plant a slower-growing cultivar from a nursery. Mueller attended Missouri Baptist College and earned her Bachelor of Arts, summa cum laude, in English from Mississippi State University. Scientific name. Capable of growing at a moderate rate to a height of 80 feet or more with a 30 to 40-foot spread, southern magnolia forms a dense (more open in the shade), dark green pyramidal shape, the lower branches often bending to the ground. Cultivars are grown from cuttings and have characteristics identical to their parent tree. Copyright Leaf Group Ltd. // Leaf Group Lifestyle.