Restoring the Root Zones of 200-Year-Old Live Oaks

The Challenge

Several mature live oaks, including one Ricky believes may be among the older oaks in the parish, showed no obvious distress. But soil and mulch had been piled against the trunks, landscaping crowded the root zones, and years of foot traffic and parking had compacted the soil.

The Assessment

Air-spade excavation exposed the root flares for inspection. The structural roots were healthy, but two girdling roots were found that would slowly constrict the tree as it grew. Compacted soil and turf competition were limiting water and nutrients to the feeder roots.

The Solution

Veteran Tree Care cleared the root flares, cut the girdling roots, and used the air spade to decompact soil along the drip line. A soil blend of mycorrhizae, microorganisms and biochar was injected into the root zone, using deeper injections where landscaping plants would otherwise take up the treatment. Fresh whole-tree arborist chips were then spread, kept off the trunk, to rebuild a forest-floor layer.

Why this approach

Live oaks evolved as forest trees. Leaf litter, fungi and loose, living soil supplied what they needed. Restoring those conditions protects surface roots, holds moisture through drought and cold, and feeds the soil biology that makes nutrients available. Over time it does more than repeated fertilizer.