Question: Cherry Laurel
why do laurocerases lose their leaves, even new ones?
Answer: Cherry laurel
prunus laurocerasus is one of the most used plants in Italy to create fast-growing hedges; this is because it is a plant with very low prices, when compared with those of other plants that can be used to form hedges. In fact it is not an ideal plant for a hedge, because over the years it tends to produce very large and robust branches, which clash in a hedge, but certainly the advantages of this plant can in some cases overcome this disadvantage. The lauroceraso is a fairly resistant plant, which usually tends to resist the attacks of parasites: it is not that it is not attacked, but even after having suffered damage, it manages to recover easily. In addition to this, a well cultivated hedge, well planted and cared for lovingly, tends over the years not to require regular watering or fertilization, and therefore apart from pruning it will always need less care. Clear that the recently planted hedges need more care than hedges for some years, which we tend to forget; in addition to this, years in which the climate is particular can make the cultivation of these plants more problematic than in other years. The partial loss of foliage is the symptom of a long series of problems, but since you do not tell us if you have recently planted the plants, or if they present other symptoms, it is not easy to tell you what the cultural problem or the parasite may be. probable in your case. When the leaves turn yellow, especially if a hedge has been home for a short time, the first thing to think about is the water: the laurocerases, over the years, tend to be satisfied with the rains; but a plant that has recently been planted in the summer tends to need watering, so that the soil does not remain dry for long periods of time. In the same way, a ground always soaked with water, which never fails to dry, can cause asphyxia of the roots, and favor the development of root rot. Other problems may instead be related to the presence of parasites, fungi (such as the aforementioned rots) or animals; the lauroceraso can be hit by oidium, usually in spring, which causes a whitish patina on the foliage, and consequent deterioration of the affected leaves. Insects widespread on this plant, aphids, mites and leafhoppers, which lurk on new shoots or under leaves. Often, in particularly fresh and humid springs, preventive treatments are practiced against fungi, based on copper and sulfur; instead against insects and mites instead, treatments are practiced only when the animals that have hit the plant have been identified. On dwelling plants for some years even more serious diseases can occur, such as the ramose cancers, or blows of bacterial fire: usually though the symptoms are more particular and precise, not simply limiting to the loss of part of the foliage.