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Dec 10, If there has been a sudden frost, a heat wave or a prolonged period of drought, the magnolia leaves may be turning yellow due to weather damage. Though mature magnolias do.
Evaluate recent weather conditions.
Sep 21, Examine the branches of your magnolia tree. Insects such as scale or ash whitefly can cause a magnolia’s leaves to turn yellow and fall off from feeding. Scale bugs and ash whiteflies secrete a clear, sticky, sugary substance known as honeydew.
This substance will coat the leaves and branches of a magnolia. The honeydew is a breeding ground for sooty mold, which looks like black charcoal dust. Mar 13, Like other broadleafed evergreen plants (ligustrums, hollies, etc.), southern magnolias drop their leaves in the spring. The only differences are that they do so much later into the spring, and.
Jul 13, Magnolias are notorious for leaf drop just before flowering. It is especially noticeable on evergreen trees that produce large leaves and create a mess when numerous leaves appear to drop at one time. This is not something you need to worry about since the tree will put out new leaves once the flowering process has ended.