To save browning Leyland cypress trees, it is important to take prompt and appropriate action. Here are the steps you can follow:
1. Identify the cause: Browning in Leyland cypress trees can be caused by various factors such as drought stress, root issues, fungal diseases, or insect infestations. Before taking any action, it is important to determine the underlying cause of the browning.
2. Prune dead and dying branches: Start by pruning back the dead and dying branches using a disinfected pole pruner. This will help prevent the spread of any potential diseases and also improve the overall appearance of the tree. Make sure to cut back to healthy green foliage or the nearest healthy branch collar.
3. Disinfect pruning tools: Clean your pruning tools before and after each use to prevent the spread of diseases. A mixture of one part bleach to six parts water is an effective disinfectant. Dip the blades of your pruner into the solution for a few minutes and then wipe them dry.
4. Improve watering practices: Leyland cypress trees are relatively drought-tolerant, but prolonged periods of drought can cause them to brown. Ensure that the tree is receiving adequate water, especially during dry spells. Deep watering is preferable, as it encourages deeper root growth. Use a soaker hose or drip irrigation system to water slowly and deeply, allowing the water to penetrate the root zone.
5. Check for root issues: Examine the roots of the tree for any signs of damage, rot, or compacted soil. Gently loosen the soil around the roots to improve aeration and promote healthier root growth. If you suspect root rot, consult a professional arborist who can provide guidance on appropriate treatments.
6. Address fungal diseases: Leyland cypress trees are susceptible to various fungal diseases, such as Seiridium canker or root rot. If you notice signs of fungal infection, such as oozing resin, cankers, or discolored bark, it is important to take action promptly. Consult a professional arborist or local extension service to identify the specific disease and recommend appropriate fungicide treatments.
7. Control insect infestations: Insects like spider mites, bagworms, or aphids can also cause browning in Leyland cypress trees. Regularly inspect the tree for signs of infestation, such as webbing, defoliation, or presence of insects. If an infestation is detected, use appropriate insecticides or seek advice from a professional to effectively control the pests.
8. Provide proper nutrition: Adequate nutrition is essential for the overall health and vigor of Leyland cypress trees. Consider conducting a soil test to determine any nutrient deficiencies. If necessary, apply a balanced fertilizer specifically formulated for evergreen trees, following the recommended application rates.
9. Monitor and maintain: Regularly monitor the tree’s health and make adjustments as needed. Keep an eye out for any signs of continued browning or new issues that may arise. Maintain a good gardening routine, including proper watering, pruning, and pest control, to ensure the long-term health of your Leyland cypress tree.
Remember, saving browning cypress trees may require a combination of actions depending on the specific circumstances. If you’re unsure or the problem persists, it is always recommended to consult a professional arborist who can provide personalized advice and assistance.
