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My Little Gem Magnolia Tree Is Losing Leaves
My Little Gem Magnolia Tree Is Losing Leaves. Little Gem, a cultivar of southern magnolia (Magnolia grandiflora) is a tree native to the United States. The loss of leaves from a Little Gem magnolia could indicate the presence of disease or need for a change in tree care.
Little Gem, a cultivar of southern magnolia (Magnolia grandiflora) is a tree native to the United States. The loss of leaves from a Little Gem magnolia could indicate the presence of disease or need for a change in tree care.
Little Gem magnolias, which reach up to 20 feet in height and grow best in U.S. Department of Agriculture plant hardiness zones 7 through 9, require full to partial sunlight. If a tree is not getting enough sunlight, its leaves may fall off. Magnolia trees are drought-tolerant, so lack of water is not a likely cause of leaf drop.
Magnolia trees are susceptible to leaf spot disease, which is caused by a parasitic alga. Leaf spot begins as a round and fuzzy colony on the leaf's surface, but the spots turn gray and the leaves die and fall off.
Leaf spot most often affects weak magnolia trees, so trees that are properly watered and fertilized will be less susceptible. The application of a copper hydroxide fungicide every two weeks during wet and cool weather may prevent the disease.
