Troubleshooting
Sheep Laurel problems — and how to fix them
Sheep Laurel (Kalmia angustifolia) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Chlorosis (yellowing leaves)
Yellow leaves with green veins indicate iron or manganese deficiency caused by soil pH above 6.0. Test soil pH and lower it with sulfur applications or water with a dilute solution of chelated iron. Avoid planting near concrete foundations or lime-rich soils.
Honey fungus (Armillaria)
Like many ericaceous shrubs, sheep laurel is susceptible to Armillaria root rot in garden soils. There is no chemical cure; improve drainage, avoid wounding roots, and remove infected material promptly. Plant in natural, open settings with good air circulation.
Sparse flowering
Insufficient sunlight is the main cause of poor bloom. Ensure at least 4 hours of direct sun. Deadheading spent flowers and removing crowded stems after flowering can improve flowering the following year.
Prevent sheep laurel problems before they start
Most sheep laurel issues are care-mismatch, not bad luck. Dial in the basics:
Sheep Laurel problems — FAQ
Why is my sheep laurel chlorosis (yellowing leaves)?
Yellow leaves with green veins indicate iron or manganese deficiency caused by soil pH above 6.0. Test soil pH and lower it with sulfur applications or water with a dilute solution of chelated iron. Avoid planting near concrete foundations or lime-rich soils.
Why is my sheep laurel honey fungus (armillaria)?
Like many ericaceous shrubs, sheep laurel is susceptible to Armillaria root rot in garden soils. There is no chemical cure; improve drainage, avoid wounding roots, and remove infected material promptly. Plant in natural, open settings with good air circulation.
Why is my sheep laurel sparse flowering?
Insufficient sunlight is the main cause of poor bloom. Ensure at least 4 hours of direct sun. Deadheading spent flowers and removing crowded stems after flowering can improve flowering the following year.