Mr. Tree’s mulching and fertilization program provides Portland‑area homeowners, HOAs, and commercial property managers with customized soil‑health solutions that strengthen tree vitality year‑round. ISA‑certified arborists begin each service visit by testing soil pH, nutrient levels, and compaction in order to identify deficiencies often found in the Pacific Northwest’s rain‑leached or construction‑disturbed soils. Armed with this data, we recommend the optimal mulch depth and an organically balanced fertilizer blend—free of excess nitrogen—to match each species’ growth stage, whether you’re nurturing young Japanese maples in Sellwood or decades‑old Douglas‑firs in Beaverton.

Our crews apply a two‑ to four‑inch layer of premium, locally sourced wood‑chip mulch in a wide, doughnut‑shaped ring that never touches the trunk, preserving bark health while suppressing weeds and moderating soil temperature. This natural blanket improves moisture retention through Portland’s increasingly dry summers, reduces erosion during heavy winter rains, and slowly breaks down to enrich microbial life that unlocks essential nutrients. For fertilization, Mr. Tree uses slow‑release, phosphorus‑free formulations injected directly into the root zone or broadcast within the drip line—methods that ensure nutrients reach feeder roots efficiently without leaching into waterways.

Beyond the initial application, Mr. Tree provides detailed aftercare guidelines and optional follow‑up visits to monitor nutrient uptake, adjust pH, and refresh mulch as it decomposes. Our digital reports include photos, soil‑test results, and recommendations for additional services such as aeration or deep‑root watering, giving property owners a clear road map for sustaining tree health. Whether you manage a single backyard oak in Gresham or an expansive corporate campus in Hillsboro, Mr. Tree’s mulching and fertilization services deliver long‑term soil stewardship that translates into stronger, more resilient trees across the greater Portland region.

Don't let your trees get out of hand. Call Mr. Tree today to get started right away.