By Richard Smith, Certified ISA Arborist WE-8745
At Bay Area Tree Specialists, deeply rooted in the South Bay community of San Jose and proudly serving the greater Bay Area, we believe in sustainable, science-backed tree care. One of the most beneficial—and often overlooked—practices we emphasize is mulching around trees, especially in areas with bare soil or sparse ground cover.
What is Mulch?
Mulch is an organic material, such as shredded bark, chipped wood, or vegetation clippings, spread over the soil surface in a 2–3 inch layer. It’s a simple yet powerful way to mimic the natural forest floor, supporting both tree health and landscape sustainability.
Why Mulching is Crucial
1. Moisture Retention and Soil Protection:
Mulch acts as a barrier between the soil and the sun, helping keep the soil cool and moist. This protects tree roots from extreme heat and reduces water evaporation—an essential benefit in California’s dry climate.
2. Natural Nutrition:
Over time, the organic mulch breaks down and enriches the soil with nutrients. This natural decomposition feeds the tree roots, boosting their energy and enhancing their ability to store nutrients for long-term health.
Go Beyond the Tree Base
Importantly, mulch should not just be concentrated around the trunk. For maximum impact, mulch should be spread out to the drip line of the tree’s canopy—and beyond if there’s exposed soil. This approach ensures the entire root zone benefits from moisture retention, insulation, and nutrient supply.
Our Arborist’s Advice
Whether you’re a homeowner in San Jose or managing properties throughout the Bay Area, proper mulching is a crucial strategy for maintaining healthy, resilient trees. It’s also a smart part of broader fire-wise landscaping practices, such as shaded fuel breaks and fuel reduction efforts.
Need guidance on the right mulch materials or application techniques for your property? Contact us today. Our certified arborist team is here to help you care for your landscape the right way—from the ground up.