Laurel hedge

Prunus laurocerasus? Like all the rest of the Prunus clan, it can develop and assortment of various fungal and bacterial issues. Shothole, both a fungal and a bacterial problem, can cause brown leaf spots that later lose the dead tissue so look as if someone took a shotgun to the plant. Some cultivars are more prone to the problem than others, but in general, avoidance of over head watering and good air circulation will go a long way in relieving the problem. Pale looking foliage is often a sign of chlorosis, most often due to an iron deficiency. Applying iron chelate or a fertilizer formulated for acid loving plants (good for ANY broad leaved evergreen) should rectify the issue.