Cause for a cypruss evergreens branches to go dry
The Gardener’s Answer
Hi, Joan in California: There are many reasons for a cypress to turn brown but only one of these reasons is considered a normal process. Evergreens shed some of their inner foliage in order to make room for new growth. If it is just the inner foliage that has turned brown then no real reason to be concerned. If it seems to become more widespread there might be something else going on but not knowing specifics in terms of age, location and growing conditions, it is hard to say but here are some possibilities. If this is a new planting and it is not getting sufficient moisture it could cause the foliage to turn brown. In some cases when evergreens go into dormancy in colder regions with extremely dry soil they are more susceptible to winter damage. If your sun-loving evergreen is planted in too much shade this could be part of the problem. To rule out any insect or disease issue you may want to take a sample of the foliage to your County cooperative Extension Service. The horticulturist will be able to give you a better idea of what is going on. You can visit the Santa Clara County website at: http://cesantaclara.ucanr.edu/.