37+ Emerald Green Arborvitae Turning Brown In Summer. It started turning brown at the edges and is working it's way in. Department of agriculture plant hardiness zones 4 to 8
Wind, sun, and lack of water in winter causes it;
The other 4 seems to be doing well and growing. Foliage browns, trunk splits near soil means freeze injury freeze injury ƒ{ normally arborvitae gradually acclimate to increasing colder. Emerald green arborvitae prefers full sunlight but can survive in partial shade. Emerald green arborvitae is an excellent plant, a great choice when looking for a narrow, upright evergreen that doesn't get too tall.