Tree Health Assessment & Hazard Evaluation in Flint, MI

"Is this tree dangerous or just ugly?" is the single most common question we answer in Genesee County. An on-site health assessment gives you a straight answer — from an actual arborist, with photos and a written report you can hand to your insurer, your buyer's agent, or your own file.

What a Health Assessment Actually Covers

This is a diagnostic visit, not a sales call wearing a lab coat. We walk the property with you and document each tree of concern:

• Species, size, and age class — measured, not guessed. Diameter at breast height, overall height, crown spread.
• Canopy condition — live-crown ratio, dieback pattern, epicormic sprouting, and thin-out patterns that point to specific causes.
• Structural inspection — trunk cracks, included bark in co-dominant stems, cavity sounding, fungal conks at the base, root-plate movement, and lean history.
• Site factors — compaction from construction, grade changes, buried utilities, sidewalk and driveway conflicts, and what the roots are growing into.
• Targets — the house, garage, fences, pools, play areas, power lines. Risk is a function of failure likelihood and what it lands on; a cracked trunk over an empty back corner rates differently than the same crack over a bedroom.

Every tree gets a condition rating, a risk rating, and a recommendation: monitor, prune, treat, cable, or remove — with the reasoning written out. If the honest answer is "this tree is fine and you don't need us," the report says exactly that.

Emerald Ash Borer Residual Risk

The first EAB wave is behind us, but ash risk in Genesee County isn't finished — it's just less obvious. Three situations we assess constantly:

• The "survivor" ash. A few untreated ash held on while every neighbor's died. Some owners read survival as immunity; it isn't. Untreated ash in this region almost always decline on a delayed clock. If the canopy is still strong, protective trunk injection can genuinely extend the tree's life — we measure live crown and give you a save-vs-remove call with numbers attached. If it's past half-canopy decline, removal is usually the honest recommendation, because dead ash gets brittle fast.
• The "zombie" ash. Trees that died but then sprouted epicormic shoots from the trunk look briefly alive from the street. They're standing deadwood with leaves stapled on — the failure risk of the parent trunk is unchanged. We check for the telltales: woodpecker flecking, D-shaped exit holes, bark splits over larval galleries.
• The recently dead. If your ash died within the last season or two, timing matters for removal cost and safety — see the removal page. An assessment tells you which category you're in.

Oak Wilt Timing — a Michigan Rule We Don't Bend

Oak wilt — a fast, often fatal fungal disease — has been confirmed in our part of lower Michigan, and it spreads two ways: through root grafts between neighboring oaks, and by sap beetles carrying spores to fresh pruning wounds. The beetles are most active from roughly April through July, which is why arborists here don't prune oaks in that window. If your oaks need work, the safe windows are dormant-season (roughly November through March) or mid-to-late summer. If a storm breaks oak limbs in June, the wound gets painted immediately — one of the few situations where wound dressing is actually recommended. We also flag root-graft risk when your oak stands close to a neighbor's, and we don't move oak firewood — that has been the disease's rideshare across the Midwest.

Ice-Storm Scar Assessment

Every ice event in the Saginaw Valley leaves behind trees that "look okay" but took structural damage at torn crotches and cracked leaders. Years later those scars harbor decay that an untrained eye can't see from the ground. We assess storm-aged damage with the tree's whole history in view: crack extent, decay mapping with sounding and probing where warranted, how much structural wood remains, and whether the failure point sits over anything you care about. Sometimes the answer is removal. Just as often it's a monitored trim schedule or a cable-and-brace system that buys decades of safe service from a scarred-but-sound veteran.

Written Reports and Who Needs Them

Standard assessment output is a written report with photos, per-tree findings, ratings, and recommendations — typically within a few business days of the visit. People who need them most:

• Insurance claims — documentation of pre-storm condition, or of storm-caused damage, to support your homeowner claim.
• Real-estate transactions — buyers, sellers, and underwriters who need an objective condition statement on the big maple near the garage before closing.
• Property managers and municipalities — portfolio triage: which trees on a site are hazards this year, which can wait, which are fine.
• Your own planning — a ranked, multi-year plan for a mature property beats a panic call during a storm.

What an Assessment Costs in Genesee County (2026)