Troubleshooting
Dwarf White Cedar problems — and how to fix them
Dwarf White Cedar (Chamaecyparis thyoides 'Andelyensis') is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Cypress aphid (Cinara cupressi)
Large, grey-brown sap-sucking aphids that colonise stems and cause yellowing or browning patches on foliage; infestations are typically noticed in spring and early summer. Inspect in late winter, treat with pyrethrin-based spray, and encourage natural predators.
Winter foliage bronzing
The blue-green foliage naturally takes on grey-purple or bronze tones in cold winters, which is normal and not a sign of disease; however, severe wind scorch on exposed sites can cause permanent browning of foliage tips. Shelter from cold, desiccating winds in colder zones.
Prevent dwarf white cedar problems before they start
Most dwarf white cedar issues are care-mismatch, not bad luck. Dial in the basics:
Dwarf White Cedar problems — FAQ
Why is my dwarf white cedar cypress aphid (cinara cupressi)?
Large, grey-brown sap-sucking aphids that colonise stems and cause yellowing or browning patches on foliage; infestations are typically noticed in spring and early summer. Inspect in late winter, treat with pyrethrin-based spray, and encourage natural predators.
Why is my dwarf white cedar winter foliage bronzing?
The blue-green foliage naturally takes on grey-purple or bronze tones in cold winters, which is normal and not a sign of disease; however, severe wind scorch on exposed sites can cause permanent browning of foliage tips. Shelter from cold, desiccating winds in colder zones.