Magnolias (genus Magnolia) are a family of flowering trees and shrubs which are among the first to bloom each spring. Hardy to U.S. Department of Agriculture plant hardiness zones 5 through 9, magnolias open their huge, distinctive, saucer-like flowers prior to their leaves grass. These trees make striking ornamentals but also are sensitive to change, so monitor your magnolia carefully for signs of infection or injury.
Consider seasonal shift. Deciduous species of magnolias naturally change colour and lose their leaves in the autumn, and might occasionally start this process early when there’s a sudden drop in temperature. Magnolias also shed a small number of leaves naturally during the year, as older leaves eventually become worn and are replaced with fresh growth. In case a few person leaves are yellowing, with no sign of spread throughout a larger area of the tree, there’s ordinarily no need for worry.
Assess recent weather conditions. If there has been a sudden frost, a heat wave or a lengthy period of drought, then the magnolia leaves might be turning yellow due to weather damage. Though mature magnolias do not ordinarily need hand-watering, they should be watered during periods of low rainfall to help reduce wilting leaves. Make sure that the soil around your magnolia is well irrigated, as poor drainage can also bring about leaf discoloration.
Check your tree for signs of harm. Splits or cracks in the tree’s bark can lead to infection and make the tree more vulnerable to changing weather conditions. Prune back any snapped or dangling branches to the collar of the branch, making clean, diagonal cuts to encourage rapid healing.
Examine your soil using a soil test kit purchased from a nursery or garden center. Leaf discoloration can occasionally result from nutrient deficiencies or chemical imbalances in the ground. Iron deficiency is a frequent cause of yellowing leaves in magnolias. If your land has a high pH level, making iron less available, reduce the soil alkalinity using peat moss or another organic fertilizer.
Discontinue use of deicing solutions or other goods containing salt which may leach into the soil around your magnolia tree. High salt levels can inhibit the tree’s ability to take in water, resulting in yellow and wilting leaves.
Prevent problems before they start by supplying your magnolia tree great care during the season. Make sure that your tree contains affluent, well-drained soil and plenty of sun. Mulch around the base of the magnolia each spring to help keep moisture and keep down weeds. Avoiding heavy pruning, whenever possible, since pruning causes the tree more vulnerable to injury and infection.