![]() Avoid over-fertilization of plants – This often produces lush growth that is more susceptible to disease.Try to manage water to 1 inch per week (natural rainfall plus supplemental watering). Facilitate watering during dry periods – There is not much that can be done for established plants when we receive too much rain, but the wild wet/dry fluctuations of natural rainfall predispose Leyland Cypress to disease.This will help to build general soil health, increasing the baseline vigor of the trees and improve their ability to naturally resist disease, thereby extending their service life. Apply ½” thick layer of organic compost once per year. Provide a mulch bed 2-3 inches thick of hardwood woodchips. The ultimate goal is to extend the service life of your screen as long as possible, however there is no cure. The best expectation from enhanced management of Leyland Cypress utilizing these suggestions is slowing the progression of Seridium and Bot Canker. How to Manage an Existing Screen of Leyland Cypress – Managing existing Leyland cypress screens can be broken into two categories, cultural treatments to keep the tree healthy and sanitation protocols to remove diseased plant material from the site. The best vegetative screen is a mix of different species, planted properly and spaced properly. ![]() Planning and Planting – see my post on vegetative screening when it is time to replace your Leyland cypress. So what does all of this mean? This means that vegetative screening is an inappropriate use of Leyland cypress, unless you can accept that the trees will probably die after 15 to 20 years and then you have to start over. But planting Leyland cypress with 20’ between trees doesn’t create an effective screen. Sure, this will create a screen in as little as two years! But over-crowded foliage doesn’t get sunlight or airflow to dry the needles, which leaves the tree susceptible to fungal diseases. This means the foliage will be crowded very quickly. This tree is actually very large, up to 20 feet wide at maturity and 70 feet tall, but when planted as a screen I see spacing as tight as 3’ between trees. These diseases are exacerbated by the tight spacing utilized when homeowners and landscapers plant Leyland cypress as a green fence. Regardless, there is no effective chemical cure for any of these diseases once they show up. I believe Seridium canker to be most common here in Union County. The cause of Leyland cypress decline is generally attributed to a few different fungal diseases: Botryosphaeria Canker, Seridium Canker or phytophthora root rot. We’ve come to call it the ‘heartbreak tree’ because just when it has really filled out and starts providing an excellent screen, the beautiful foliage starts to brown out and the tree starts dying very quickly. Unfortunately, Leyland cypress regularly succumbs to disease and I receive a large amount of phone calls asking for help with this tree. It is found at nearly every store and garden center, it is fairly inexpensive, it establishes very easily with little care, and it grows very fast to create a vegetative screen quickly. Leyland cypress is commonly planted in Union County in a row with tight spacing to create a ‘green fence’ (see my post on vegetative screening). The offspring of that cross produced what we know as the Leyland cypress ( x Cupressocyparis leylandii ). Leyland cypress is a hybrid of two trees native to the Pacific Coast – Monterey cypress ( Cupressus macropcarpa ) and Alaska cedar ( Chamaecyparis nootkatensis ). Please note that some applications and/or services may not function as expected when translated. NC State Extension does not guarantee the accuracy of the translated text. As with any Internet translation, the conversion is not context-sensitive and may not translate the text to its original meaning. To the extent there is any conflict between the English text and the translation, English controls.Ĭlicking on the translation link activates a free translation service to convert the page to Spanish. Por favor, tenga en cuenta que algunas aplicaciones y/o servicios pueden no funcionar como se espera cuando se traducen.Įnglish is the controlling language of this page. NC State Extension no garantiza la exactitud del texto traducido. Al igual que con cualquier traducción por Internet, la conversión no es sensible al contexto y puede que no traduzca el texto en su significado original. En la medida en que haya algún conflicto entre la traducción al inglés y la traducción, el inglés prevalece.Īl hacer clic en el enlace de traducción se activa un servicio de traducción gratuito para convertir la página al español. El inglés es el idioma de control de esta página.
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