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Giant arborvitae trees flank Maude’s Garden on Seattle’s First Hill, muffling the hum of city traffic for this tiny therapeutic oasis.

Q: I have a boundary row of 50 arborvitae.

Q: I have four arborvitae that have died or are in the dying phase.

Limiting the number of upright limbs on an evergreen such as arborvitae leaves fewer to break off, and a narrower top to better shed snow.

People who crave quick evergreen screening seem to be turning less to the problem-prone Leyland cypress in favor of the arborvitae Green Giant, a better plant but suffering now from overuse.