19+ Why Does Arborvitae Turn Brown. The reason why arborvitae foliage turns brown. Deep watering of the soil around the tree is a solution to this problem.
Arborvitae foliage turns brown naturally in winter, and inner branches drop.
Besides needing very little maintenance, the arborvitae are however, the arborvitae tree can develop diseases that have to be treated quickly and effectively for the tree to survive. The oldest, interior branchlets on an arborvitae normally turn brown and fall off in autumn. Arborvitae (thuja) genus of coniferous trees in the cupressaceae (cypress family). The reason why arborvitae foliage turns brown.