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City Leaf Mulch for Azaleas: Generally Safe

Street-collected leaves may have trace oil or antifreeze, but the vacuum truck's mixing dilutes contaminants to negligible levels. A 1-inch mulch layer poses no risk to azaleas or other landscape plants.

About Gardening: Troubleshooting Swamp Milkweed: Spider Mites, Aphids, and Webbing; Bougainvillea Cream Spots and Leaf Drop: Magnesium or Water; Oak Tree Webbed Clumps: Fall Webworms, Minor Pest; Azalea Mealybugs: White Sacs and Crawling Bugs; Paperwhite Bulbs: Black Streaks and Flopping—Light or Bacteria?; Troubleshooting Gloxinia Decline: Questions to Pinpoint the Cause; Mole Control That Works: Debunking Myths and Mastering Trapping; Summer Defoliation: Humidity, Fungicide Gaps, and Foliar Feeding for Recovery; Mulching Around Young Groundcovers: Yes, But Temporarily; Yellow Azalea Leaves in Winter: Normal or Problem?

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