Answer: Reddish brown foliage on arborvitaes is not a good sign. It indicates the foliage is dead. I'd prune them back to encourage healthy new growth. You can shear them with hedge trimmers to remove most of the dead foliage and promote new growth. The growth should be upright and strong, not bent over. Try feeding with an 8-8-8 fertilizer and watering deeply once each week over the summer growing season. I hope they perk up for you!
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