Arborvitae 'Green Giant' Interior Browning: Likely Shading, But Get Extension Diagnosis

Common Cause

Inner needles brown from shading as canopy densifies—normal. But 3 adjacent trees showing top-down browning warrants check.

County Extension office (courthouse) — horticulture agent can visit or examine sample.
Georgia has excellent diagnostic lab via Extension.
Local nursery/garden center can also inspect.

Rules out spider mites, root rot, or canker. Expensive trees deserve free professional evaluation.

Plant Diseases: Arborvitae One-Sided Browning: Environmental Diagnosis Needed; Arborvitae Brown Spots After Neighbor’s Chemical Driveway Treatment: Possible Drift Injury; Green Giant Arborvitae Tip Browning: Root Stress, Not Drought; Do Green Giant Arborvitae Attract Mosquitoes? Myth vs. Reality; Green Giant Arborvitae Placement: Root Risks to Foundations; Spacing Green Giant Arborvitae for Privacy Screen on 2.5 Acres; Green Giant Arborvitae for Shade Under Loblolly Pines; Green Giant Arborvitae in Partial Shade: Will They Work?; Green Giant Arborvitae Fertilization: Timing, Rate, and Herbicide Warning; Green Giant Arborvitae Shade Tolerance

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