Yew shrubs are prized for their lush, dark green needles that provide year-round interest. However, it can be alarming when the foliage takes on a sickly yellow hue. Yews turning yellow is often a sign of underlying problems that need to be addressed. In this comprehensive guide, we’ll explore the most common reasons why yews turn yellow and provide solutions to restore their health.
Overwatering and Poor Drainage
One of the most common causes of yews turning yellow is overwatering or planting in sites with poor drainage Yews are highly susceptible to root rot if their roots remain constantly wet Even short periods of waterlogging can be detrimental, Dieback and yellowing of inner needles typically appears first if root rot is the culprit,
To avoid wet feet problems ensure yews are planted in well-draining soil. Improve drainage by incorporating organic material or gravel into heavy clay soils before planting. Check that the site does not collect water after rains. Provide sufficient space between plants for air circulation. Water deeply but infrequently allowing the soil to partially dry between waterings.
Nutrient Deficiencies
Lack of certain essential nutrients can also cause yew needles to turn yellow. Nitrogen deficiency typically causes uniform yellowing across the whole shrub. Yellowing between leaf veins may indicate iron or manganese deficiency.
Have your soil tested to identify any nutritional shortfalls. Yews prefer slightly acidic soil with a pH between 6.0-6.5. Fertilize in early spring with a balanced organic fertilizer formulated for acid-loving plants. Foliar sprays of chelated iron can help correct iron deficiency.
Sunscald and Environmental Stress
If yew needles turn yellow after a cold winter, it may be due to desiccation from sun and wind exposure. Evergreen foliage can suffer sunscald injuries if not hardened off properly in fall. Plunging temperatures and intense sunlight with no insulating snow cover worsens the problem.
Providing winter wind protection helps minimize potential sunscald damage. Maintain vigor with proper watering and fertilization going into winter. Spraying anti-desiccant compounds in late fall can add extra protection on susceptible plants.
Root Disturbance
Root damage from transplantation or construction activities can also trigger yellowing, Yews resent root disturbance and may show signs of transplant shock if not handled carefully Keep as much of the root system intact as possible if the yew needs to be relocated Water generously after planting and do not fertilize until new growth appears,
Pest or Disease Problems
Insect infestations and diseases may contribute to yew yellowing. Common pests like spider mites, scale, and root weevils can weaken plants. Diseases such as Phytophthora root rot, Armillaria root rot, and Cercospora blight cause yellowing and dieback.
Check for signs of infestation like webbing, sticky residue or rotting roots. Treat with appropriate organic insecticides or fungicides. Improve air circulation and water drainage to make conditions less favorable for pathogens.
Normal Seasonal Yellowing
Some inner needle yellowing and drop is normal each fall as the yew prepares for winter dormancy. As long as the majority of foliage remains green and healthy, minor seasonal yellowing is not a concern. Dead inner needles that persist on the shrub can be gently hand pruned at any time.
How to Restore Yellowed Yews
If excessive yellowing indicates a serious underlying issue, take corrective action promptly before dieback occurs. Improve drainage, scale back watering, apply nutritional supplements, or use appropriate treatments for pests/disease as outlined above. Severely affected branches can be pruned back to healthy wood.
With prompt care, mildly stressed yews can often recover fully. However, severely declined plants may continue to deteriorate. If more than 50% of the shrub shows dieback, removal and replacement may be the best option. Choose disease-resistant cultivars when planting new yews. Provide optimal care to maintain health going forward.
Catching and correcting problems early is key to prevent yew yellowing. Monitor soil moisture, fertilize properly, and watch for signs of pests or infections. Address any drainage issues before planting new specimens. With appropriate care, your yews will reward you with lush evergreen beauty for years to come.
The Yellow Leaf Rescue Plan
Soil testing is the first step in rescuing your English Yew from yellow-leaf despair. Its like a health check-up for the ground your Yew calls home. Deficiencies in nitrogen, iron, or magnesium can lead to yellowing, so get the lowdown on whats lacking.
Once youve got your soil report card, its time for a nutrient intervention. Choose a fertilizer thats like a multivitamin for your Yew, tailored to its needs. Remember, a balanced diet is key, so opt for a slow-release fertilizer that wont overwhelm your plant. Apply it carefully around the root zone and water it in to kickstart the nutrient uptake.
Overwatering is a surefire way to drown your Yews spirits, while underwatering leaves it parched. Strike a balance; your Yews thirst varies with the seasons. Use the finger test or a moisture meter to ensure the soil is moist but not soggy. Water deeply but infrequently to promote robust root growth.
Drainage is your Yews best friend. If your soil clings like a koala to a eucalyptus, its time for amendments. Mix in perlite or sand to improve soil structure, ensuring those roots can breathe and stay dry.
Creating a Yew-Friendly Zone
Your English Yew isnt a fan of the spotlight or the freezer. Position it in a sheltered spot to protect it from scorching sun and biting cold. Landscaping can be a Yews armor against the elements. Consider companion planting or strategic placement to provide natural windbreaks and shade.
Remember, your English Yew is more than just a plant; its a living sculpture in your garden. Treat it with the respect it deserves, and itll reward you with its evergreen elegance.
My Yew Bushes Are Turning Yellow
FAQ
What does an overwatered yew look like?
How do you rejuvenate a yew?
How to save dying yew?
Do yews turn yellow?
Fertilizer containing potassium and phosphorus can also help maintain the vigor of the yew shrub and prevent yellowing of leaves. Yews are popular evergreen shrubs that can add a touch of greenery to any garden. However, yellowing of the foliage can occur, which can be a sign of various problems.
What causes yellow eyes?
Jaundice is when your skin or the whites of your eyes turn yellow. Jaundice occurs when the oxygen-carrying components in the blood, called hemoglobin, break down into bilirubin and your body doesn’t clear the bilirubin. It can occur due to; Alcohol use disorder liver cancer liver infection nonalcoholic fatty liver disease hepatitis B and C Hemochromatosis Gallstones Gall bladder cysts, tumors gallbladder inflammation (cholecystitis)
Why is my yew tree turning yellow?
Improper planting and environmental factors can also cause yellowing of yew foliage. Yews should be planted with their trunk flares exposed and not buried too deep. Drought stress, winter damage, salt damage, and deer browsing can also cause yellowing of leaves. Pruning, thinning, and dieback can also result in yellowing foliage. 4.
Why is my yew wilting?
Pests feed on yew foliage, causing yellowing, distortion, and wilting of leaves. Severe infestations defoliate the plant and reduce its capacity for photosynthesis and nutrient production. Some pests target yew flower buds, consuming them or causing deformities that prevent them from maturing properly.