The Leyland cypress will tower over the spiraea bush if they are next to each other. Frequently, these trees are planted too close together which reduces the sunlight the plants receive, thus causing them to decline. This evergreen tree grows fast and high, growing up to 4-feet a year when it is young. Oh well. I have Leyland cypress trees planted about 6 ft apart. The next consideration is spacing. Over the past 20 years, the trees were planted too close together, they often grew together and became over-crowded. Leyland cypress is susceptible to bagworms as well and need routine monitoring to prevent and infestation. The Leyland cypress is the most common tree used for privacy and windbreaks in the United States. The closer you plant your trees the sooner you will have a solid screen, but you may also restrict their growth and make it harder to get the height you need. Well-drained soil a must. Many folks bought small leyland cypress, a foot or two in height, and planted them 3 or 4 feet apart. Part of the problem is that people tend to plant the cypresses too close together. Planting too close to a fence, building or each other will prevent the interiors of the trees from drying out, he said, and could lead to fungal diseases. Leyland cypress trees get sick easily. What we have found over the past 20 years, is that many times the trees were planted too close together. You’ll get some ugly gaps. If the trees are planted too close together, there is a lot of root competition for moisture and nutrients, and the trees will also suffer from a lack of sunlight and poor air circulation. Sun and shade . If you plant them too close together they become more susceptible to root rot. For added nutrients, add potting soil or topsoil to the hole. Another problem is that most people look at Leyland cypresses as large shrubs and plant them too close together. Planting a cypress too close is not recommended. Do not plant the Leyland’s main stem too far below the ground level, as this can lead to decay and rotting. However, because of its relatively shallow root system, and because they are often planted too close together and in poorly drained soils, Leyland cypress are prone to two damaging canker diseases, especially during periods of prolonged drought. However, because of its relatively shallow root system, and because they are often planted too close together and in poorly drained soils, Leyland cypress is prone to root rot and several damaging canker diseases, especially during periods of prolonged drought. Regardless of how nice it looks, due to thousands planted too close together or in bad soil or in a small space, there will be a lot of work for removal services. I want to trim them into … Mulch them after planting but mulches should be no deeper than two to four inches. Mulch them after planting but mulches should be no deeper than two to four inches. You will be tempted to plant the seedlings too close but ten-foot spacings should be a minimum in most landscapes. These are one of those plants that people plant way too close together for a quick screening effect, but down the road they become a tangled, shaded out, floppy mess if not given regular maintenance to control them. Leyland Cypress Alternatives Leyland Cypress Problems. ... you’ve decided to remove them all. Disease management is, therefore, There is no tree more often unappropriately planted than this, sometimes even used as a foundation plant. Although this is not essential, it will increase the tree's chances of survival. Kitten is right about their width and height. We are guilty of creating many of the stresses we see by planting them too close together and too close to … Mulch them after planting but mulches should be no deeper than two to four inches. As well, by planting too close together you can encourage lower branches to die, ending up with a more open screen than you needed. There is no treatment for Seiridium canker. The trees should be at least 10 feet apart, preferably 12 to 15 feet apart, and a minimum of 15 feet away from structures. Leyland Cypresses can cause neighborly strife. The problem arises when these trees are planted too close together in the beginning without consideration for how much growth there will be over time. Leyland cypress was recommended widely about 20 years ago, as a fast growing, evergreen landscape tree good for property lines and privacy screens. However, they are usually planted too close together. Around 6 weeks prior to the first frost, usually mid-fall, is the best time to plant. Best spacing for Leyland cypress plants is about 10 feet apart. Leyland Cypress trees are very susceptible to many diseases and insects. The only solution in most cases is … Leyland cypress planted too close together, near paved areas, next to walls or other heat reflecting surfaces may need special care in watering and planting to get established and to grow well. Leyland Cypress are hardly what one would call "narrow" trees. When planting Leyland cypress, remember the tree's mature size and fast growth rate. If the trees have been planted too close together, inevitably one or more will die. These trees were good for property lines and privacy screens. Plant Leyland cypress in well-drained soil in sunny locations. Leyland cypress planted too close together, near paved areas, next to walls or other heat reflecting surfaces may need special care in watering and planting to get established and to grow well. Consider broadleaved evergreens for dense screens that also have flowers or berries for seasonal color. Mulch them after planting but mulches should be no deeper than two to four inches. Time to start all over again. Gently loosen the soil around the Leyland’s root system. Canker diseases and feeding by bagworms are perennial problems we see here in Tennessee. Leyland Cypress is an example of a plant commonly used as an evergreen screen planting for its uniformity and ability to provide a buffer for privacy, noise control, and as a windbreak.