WARNING: What’s the most common threat to...

WARNING: What’s the most common threat to trees in Orange County? Those cut-rate tree trimmers and landscapers, says Alden Kelley, above, a doctor of plant morphology and consulting arborist in Fullerton. . . . Planted in bad locations, trimmed back like hatracks, “it’s amazing trees survive all this professional care.” . . . He urges homeowners to become their own experts and has devised a free workbook and slide show to be distributed by the local Tree Society beginning next month. Call the Fullerton Arboretum.