This is winter damage. Winter damage turns whole or part of broadleaf evergreens brown and often makes small leaf imperfections and leaf spots from the previous summer more noticeable. Winter damage is caused by cold winds and/or sunburn from the sun reflecting off of the snow. The plants that most frequently show winter damage are the broadleaf evergreens such as Cherry Laurel, Rhododendrons, Holly, Camellias etc. Boxwoods and Euonymus often turn dry and tan.
Because these plants have leaves that are scorched, the areas on the foliage that had some leaf spot damage from last summer are more evident. You’ll see dark spots, or white spots where the leaf tissue actually died last summer or fall and now is turning tan or white. On some plants, such as cherry laurel, such dead leaf tissue often drops out and leave holes.
At this point there isn’t anything that you need to do – the plant will drop this scorched foliage this spring and will put on new growth. Once you see that new growth appearing you can clip off any toasted twigs or branches that are not responding with new leaves, and prune any odd looking limbs away.
To help prevent leaf spot in the spring and summer, make sure that the plants aren’t getting hit with water from a sprinkler on a frequent basis, as this is a prescription for leaf-spot fungi. To help protect broadleaf evergreens in advance of winter you can use an anti-desiccant product in October, although in a really cold or snowy winter plants will still show some winter damage.
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