Cedar Hedge Care: Spraying, Spider Mites, and Fall Needle Drop

Malathion Spraying: Necessary?

Spraying cedars with malathion controls cedar aphids, which cause yellowing and needle drop. However, as trees grow taller, spraying becomes impractical. Aphid damage is usually cosmetic.

Spider Mites: Not Typically an Outdoor Problem

Red spider mites thrive in dry, enclosed environments (greenhouses). Outdoor cedars in Vancouver's climate rarely suffer significant mite infestations.

Dead Undergrowth: Normal or Not?

Interior needle shedding in fall is normal for cedars. However, if you see mushrooms near the base over several autumns, honey fungus (Armillaria) may be present—a serious root rot. Consult a plant disease specialist for diagnosis.

Fertilizing

Spring compost application is excellent. Avoid over-fertilizing, which can stress trees.