Hardy to zone 5, according to the USDA plant hardiness map, cherry laurel shrubs produce beautiful and aromatic white flowers in the spring. Photograph by Sebastian Rittau via Flickr.. One thing to know about Prunus laurocerasus (which emits the pleasing fragrance of almonds when its leaves are crushed), is that it contains hydrogen cyanide, a poison.If ingested in large amounts, hydrogen cyanide can deplete the nervous system of oxygen and, in rare cases, even cause … Botryosphaeria infection attacks stressed plants, including cherry laurel shrubs. The 'sick' laurel are all on one side, some grouped but some separated by semi-good laurel, and the soil is the same all the way along that one side. I'm not sure why. Cherry Laurel, which is the most useful and widely grown of all the Laurels, will grow in almost any kind of soil. Botryosphaeria Infection. Q. Cherry laurel is the primary shrub that it attacks. Hope that you can still save the trees. Ask a Question forum: Newly planted Cherry Laurel plants are dying. In general, cherry laurels grow best in a well drained soil in morning sun and afternoon shade. It's hard to know whether hedges are to keep people in or out but whatever their purpose, laurel hedges are amongst the most popular. Then the the tops of the stems start to shrivel and go limp. This infectious fungus causes limb dieback on cherry laurels; though the plant may appear to be healthy, manifestation of these symptoms is a sign that the shrub is actually ill. It seemed to recover and sent out new green growth. - My cherry laurel bushes are still brown and very little sign of turning green with flowers. I've just had some monsters pruned as they had grown too big for me. Pale brown spots appear next to the leaf veins and the whole shrub may appear to be sun-scorched. Laurel is pretty bullet proof under the right conditions - it pops up everywhere in my clay soil and is glossy and healthy. Q: I planted a group of cherry laurels 3 years ago, and each year the leaves yellow in early summer. Laurel is a robust plant that will take a lot of abuse. Only the members of the Members group may reply to this thread. Prunus laurocerasus, also known as cherry laurel, common laurel and sometimes English laurel in North America, is an evergreen species of cherry (), native to regions bordering the Black Sea in southwestern Asia and southeastern Europe, from Albania and Bulgaria east through Turkey to the Caucasus Mountains and northern Iran.. Cherry laurel is hardy in U.S. Department of Agriculture hardiness zones 7 through 10. Published on Mar 29, 2017 Jim Crowder from Memphis Botanic Garden says if sections of the Otto Luyken Laurel plant are dying out it is probably Phytophthora root rot. Laurel: leaf diseases Cherry laurel (Prunus laurocerasus) is generally considered a tough evergreen but its leaves can be affected by diseases such as powdery mildew, leaf spot fungi and bacterial shothole. Privacy Policy and Views: 1000, Replies: 6 » Jump to the end. They told us the landscaper should have planted in the holes and refilled with the garden soil with a layer of compost and mulch on top only. The landscaper instructed us to also buy several bags of compost so we did. 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