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Arborvitae Multiple Leaders: To Prune or Not?

Removing competing leaders on a mature 'Green Giant' exposes a large brown patch that won't fill in. Pruning should have been done young. If interior foliage is dense, careful removal may work, but expect a permanent aesthetic flaw. Consider living with the multi-stem form.

About Gardening: Emerald Arborvitae Death and Fern/Vinca Problems: Soil and Pest Issues; Arborvitae Single Tree Decline: Fungus, Nematodes, and Atomic Grow Micron Cleansing; Connecting Multiple Solenoids to One Common Wire – Waterproof Wire Nut; Multiple Cephalotus in Large Self-Watering Pots: Fine with Monitoring; Multiple Ailing Houseplants: Light and Water Basics; Diagnosing Browning Emerald Green Arborvitae in First Year; Albino Squirrel Visits Yard; Arborvitae Black Flagging: Abiotic Stress, Not Disease; Pruning Arborvitae: Severe Cuts Lead to Permanent Bare Spots; Goosegrass Control in Fescue: Pre-Emergent in May, Post-Emergent if Needed

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