Inner Browning on Emerald Green Arborvitae: Overwatering in Clay

Inner Browning on Emerald Green Arborvitae: Overwatering in Clay

Brown inner foliage on recently planted arborvitae in clay soil indicates overwatering. Clay holds water, suffocating roots; outer tips brown from drought, inner from rot. The soil should be moist, not soggy, a few inches down.

Watering Fix

• Check soil moisture before watering; only water if top 2-3 inches are dry.
• If mulched, rainfall may be sufficient; supplemental water often unnecessary.
• Improve drainage by aerating or adding compost to planting area if possible.
• Arborvitae tolerate wet feet better than most evergreens but not standing water.

Adjusting irrigation usually stops the browning; new growth will fill in.