![]() Discard all plant clippings and debris and be sure to apply fungicides to control the spread of the fungal infection. To treat the ailing laurel plants, prune away damaged plant parts using sterilized pruning shears. Root rot and leaf spots are fungal diseases that could lead to yellowed leaves. Warm and moist weather could also encourage fungal growth, especially in spring. Fungal diseasesĪs mentioned previously, fungal diseases could develop due, in part, to the presence of pests. You may also opt for low-toxicity herbicides, especially for severe infestations. To fix the problem, spray the affected foliage with a jet of water to dislodge the pests, and treat the infected leaves with neem oil or horticultural oil. These insects could cause damage that leads to leaf spots, black sooty mold or other diseases. Other pests that commonly invade laurel include aphids, scales, thrips, lace bugs and whiteflies. Heavy infestations that are left untreated could lead to yellowing leaves that become thick and brown, and eventually fall off. These pests suck on the plant’s sap during the late spring months and lay their eggs on the undersides of leaves. Bay suckers are tiny, brown insects that resemble aphids. Laurel leaves could turn yellow due to pest infestations. Also avoid overwatering the plants to prevent soggy, waterlogged root systems. Ideally, you should test the soil’s existing pH to determine the required amount of fertilizers. To fix soil problems, add aluminum sulfate to the soil to enrich it with essential nutrients like iron and nitrogen. Moreover, if the plants are overwatered the soil can get waterlogged, and this could lead to root rot that also causes yellow leaves. If they are planted in alkaline or poorly-draining soil, they could develop chlorosis caused by iron deficiency, and the outcome will be yellowing leaves. Laurel Leaves Turning Yellow: What Are The Common Reasons? Soil conditionsīay laurel plants thrive in well-draining acidic soil. As with most plants, they can also be prone to certain conditions that cause yellowing leaves. These evergreen shrubs or trees can grow up to 50 feet and are commonly used as ornamentals or for privacy hedges. ![]() These plants are native to the Mediterranean region and the Eastern United States, and are also referred to as bay trees, Grecian laurel, Mediterranean bay, noble laurel, sweet bay, Roman laurel, and true laurel. Laurel, or bay laurel, with the scientific name Laurus nobilis, are plants popular for their aromatic leaves, which are used as seasoning in cooking. ![]()
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