White Fuzzy Spots and Browning on Arborvitae: What's Happening?

Arborvitae naturally shed inner foliage as they age, especially in fall and winter. But white fuzzy "eggs" on branches warrant closer inspection—they could indicate an insect issue like spider mites or scale.

Normal Seasonal Browning

Interior browning on evergreens like arborvitae, junipers, and pines is typical this time of year. As long as the outer growth remains green and the tree receives occasional winter watering during dry spells, there's usually no cause for concern.

Identifying the White Spots

The "eggs" may be insect egg masses, scale insects, or even a fungal growth. To get a definitive ID:

• Snip a small affected twig and take it to your local garden center or nursery.
• Or, take a clear, close-up photo (review it on a computer first to ensure focus) and send it to a plant expert or extension service.

Next Steps

Once identified, treat accordingly—horticultural oil or insecticidal soap for soft-bodied insects, miticides for spider mites. Maintain tree vigor with proper watering and avoid stress, which makes plants more susceptible to pests.