Troubleshooting
Weeping Eastern Hemlock problems — and how to fix them
Weeping Eastern Hemlock (Tsuga canadensis 'Pendula') 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.
Woolly adelgid
A devastating pest in eastern North America. Look for white woolly masses at needle bases; treat with horticultural oil or systemic insecticide and choose adelgid-resistant sources where possible.
Elongate hemlock scale
Causes yellowing and needle drop. Treat with horticultural oil in spring.
Tip browning from drought
Hemlock is very drought-sensitive. Maintain consistent moisture and mulch deeply around the root zone.
Root rot
Poorly drained soils cause root decline. Ensure good drainage and avoid planting in low-lying areas.
Winter desiccation
Exposed sites cause winter browning. Shelter from cold, drying winds and avoid planting near de-iced surfaces.
Prevent weeping eastern hemlock problems before they start
Most weeping eastern hemlock issues are care-mismatch, not bad luck. Dial in the basics:
Weeping Eastern Hemlock problems — FAQ
Why is my weeping eastern hemlock woolly adelgid?
A devastating pest in eastern North America. Look for white woolly masses at needle bases; treat with horticultural oil or systemic insecticide and choose adelgid-resistant sources where possible.
Why is my weeping eastern hemlock elongate hemlock scale?
Causes yellowing and needle drop. Treat with horticultural oil in spring.
Why is my weeping eastern hemlock tip browning from drought?
Hemlock is very drought-sensitive. Maintain consistent moisture and mulch deeply around the root zone.
Why is my weeping eastern hemlock root rot?
Poorly drained soils cause root decline. Ensure good drainage and avoid planting in low-lying areas.
Why is my weeping eastern hemlock winter desiccation?
Exposed sites cause winter browning. Shelter from cold, drying winds and avoid planting near de-iced surfaces.