To treat the infected laurel plant, prune damaged parts with sterilized pruning shears and discard plant clippings and debris from around its base. When Portuguese laurel's (Prunus lusitanica) evergreen leaves turn yellow, something may be seriously amiss. Avoid over-watering the plant or causing its roots to stand in pools of water for prolonged periods. There are a multitude of reasons why the leaves on a laurel turns yellow. Excessive fertilizer burns the roots of the plant, causing its foliage to turn yellow. Posted on: June 3rd, 2015. Fungal diseases responsible for yellowing laurel leaves mostly occur in spring, during cool, warm and moist weather.
A lack of nitrogen can also create a pH imbalance. The key to successfully treating any problem is to act quickly. California Laurel. What if your bay laurel has yellow leaves though? The shrubs planted in poorly draining or alkaline soils develop chlorosis, a nutrient deficiency that causes partial or complete yellowing of foliage.
Clemson Cooperative Extension; Laurel; Marjan Kluepfel, et al. ; 1999, The Connecticut Agricultural Experiment Station; Mountain-Laurel (Kalmia); 2007,
Fungal diseases responsible for yellowing laurel leaves mostly occur in spring, during cool, warm and moist weather. Read label directions beforehand for administration rates and precautions.
While some insects sap essential juice from the leaves, causing them to turn yellow and drop prematurely, others secrete sticky honeydew that not only attracts ants but also serves as the breeding ground for sooty mold fungus. If you want a quick screen then plant your laurel hedging plants at 2ft apart but if you are willing to wait a bit longer, you will get just as dense a hedge by planting at 3ft apart. Tel: 01277 229709 They feast on the tree’s sap in late spring months and lay their eggs on the undersides of the leaves. If the tree isn’t treated, the leaves will become thick, turn brown, and fall off. Laurel shrubs thrive in well-draining, acidic soils.
Improper soil conditions also cause yellowing leaves on a laurel. Low nitrogen will bring on a uniform yellowing of your bay laurel’s leaves, beginning with the older lower leaves and moving up the tree. Planted, watered and fed them well, and now find the lower leaves are turning yellow. Link; 1994, Floridata; Cherry Laurel; Jack Scheper; 1997. However, a number of factors adversely affect their health, causing the glossy, green leaves to turn yellow. My suppliers advised me to cut them down by half of their growth above one of the many buds on the stem, this will cause bushier growth and should cure the problem. Inspect your laurel shrub frequently and take prompt action against pests. Replant it in fresh, well-draining soil and water only when the top layer of soil is dry. Bay Laurel is native to the Mediterranean region. Leaf spots and root rot are common diseases in laurel shrubs that cause yellowed foliage. Spray a jet of water from a hose over infestations, or treat infested leaves with neem oil or horticultural oil. I've done this, and hope it'll be alright, but still wonder EXACTLY what might have caused this … Company No. Bay suckers are tiny brown bugs that resemble aphids. The eggs hatch into white, fuzzy looking larvae. Ideally, the plant benefits from one fertilizer application every spring, before new growth. If you’re noticing any yellow leaves on bay laurel plants that you may be growing, here are the most common causes. We planted a hedge on two sides of our garden last year, one side has grown like wild fire, the other has hardly grown and some of the Laurel all the leaves on the plant of turned yellow. Apply a registered fungicide to control spread. 25 Vernon Crescent,
The good news is, often these problems can be reversed with the right attention – and in some cases professional help. Find more gardening information on Gardening Know How: Keep up to date with all that's happening in and around the garden. If your bay laurel has yellow leaves, it could mean it’s being visited by an insect called a bay sucker. Can anyone help me … Sign up for our newsletter. All infected leaves and stems should be removed and completely disposed of. Again, be sure the tree has good drainage. Pests including aphids, scales, whiteflies, thrips and lacebugs are common on laurel shrubs. The fungal spores of the diseases overwinter in the debris at the base of the plant and spread through irrigation and rain water. We cover Essex and these areas. Used as privacy hedges or ornamental plantings, laurels are evergreen trees or shrubs that produce fragrant flowers in shades of white, pink and purple and red. You can correct the pH with sulfur or peat moss. CM13 2BH. Why are the leaves of my laurels turning yellow? Amend the soil with aluminum sulfate to provide the plant essential nutrients. The good news is, often these problems can be reversed with the right attention – and in some cases professional help. Learn which plants thrive in your Hardiness Zone with our new interactive map! Wet roots are often the underlying cause of a yellow bay laurel plant. If you think your bay laurel has been overwatered, you may be able to save it. Space the fertilizer from the wood to prevent burn, and irrigate the soil deeply after the application.
Just remove the yellow leaves, make sure the area around the plant stays tidy, and give it a bit of fertilizer. Plan the perfect garden with our interactive tool →. If their roots get waterlogged, they will easily develop root rot, which can turn the leaves yellow and cause the plant to become droopy. To treat the infected laurel plant, prune damaged parts with sterilized pruning shears and discard plant clippings and debris from around its base. Iron chlorosis can develop when your soil is too alkaline or if there is root damage. The list below covers four of the most common reasons for yellowing leaves on an English laurel: We hope you found this article on ‘Why are the leaves of my laurels turning yellow’ useful, if you would like to discuss any aspect of this article then please do not hesitate to call Prince Tree Surgery on 01277 229709. I bought 30 Laurel plants to create a hedge. VAT No. Be sure to follow directions when using fertilizer. Alternatively, spray a low-toxicity herbicide over large infestations. All Rights Reserved.
If you see signs of bay suckers or their eggs, treat the plant’s leaves and stems immediately with insecticidal soap and check occasionally to be sure you got them all.