Leland Cypress Trees
We have noticed on our Leland cypress trees some of them have brown tips on them. Can you please tell me what is causing that and what to do? These trees are 15 years old and I would hate to lose them. Thank you and we look forward to hearing from you.
Please send us photos so we can see what you are dealing with. There are several insects and diseases that can impact Leyland cypress, not to mention problems caused by improper planting, root damage, drought, and other abiotic problems.
Send photos of the whole tree, around the base, and affected foliage.
We looked at your photos. There may be several reasons for the browning such as winter damage and/or seridium canker. In general, Leyland cypress are not that winter hardy here during cold winters and winter damage can be displayed in varyng degrees. They grow best in full sun with plenty of air circulation and appreciate moisture during dry periods. When planted closely together there is a lot of root competition for moisture and nutrients.
When stressed due to drought, planting too deeply, poor soils, poor drainage, etc. the trees can be susceptible to seridium canker, a fungal disease.
Take a look at our website for more information. All you can do is monitor the growth of the trees throughout the season. Prune out any dead wood during dry weather. No chemical control is recommended. Keep well watered during dry periods and make sure mulch is no thicker than several inches. http://extension.umd.edu/hgic/seridium-and-botryosphaeria-canker-leylands-trees
You can contact several certified arborists for an onsite evaluation regarding the health of the trees. http://www.treesaregood.org/