Tree-Inspection Red Flags You Can Spot From the Driveway
An arborist's first walk around a property is mostly observational. Here are the visual cues we check on every property — in roughly the order we check them. None require equipment more sophisticated than your eyes and 60 seconds of attention per tree.
A trained arborist's first walk around a property is mostly observational. You're looking for warning signs that almost any homeowner could spot if they knew what to look for. Here are the visual cues we check on every property — in roughly the order we check them. None of them require equipment more sophisticated than your eyes and about 60 seconds of attention per tree.
1. The lean
Look at the trunk against a fixed vertical reference — a building corner, a fence post, a utility pole. Is the trunk straight up, or does it lean toward something? A consistent lean that's been there for decades is usually fine. A new lean — particularly one that's gotten more pronounced in the last year — is a red flag for root-plate compromise. Compare against your own memory or older photos of the property.
2. Fungal conks at the base
Walk around the base of each tree. Look for woody shelf-like growths protruding from the trunk or root flare. These are fungal fruiting bodies (conks) and they indicate substantial internal decay. Common Florida culprits: ganoderma butt rot on palms (a flat brown semicircular conk at the base of the trunk), and various wood-rot fungi on hardwoods. Conks = professional assessment, soon.
3. Visible bark damage or oozing wounds
Significant bark stripping, vertical cracks running up the trunk, or wet oozing patches on the bark are all warning signs. On oaks in spring, oozing can specifically indicate oak wilt (a serious vascular disease). On any species, large bark wounds (over a third of trunk circumference) compromise the tree's vascular system.
4. Canopy density
Look up. Is the canopy dense enough that you can't see much sky through it during full leaf-out, or can you see through it? Progressive thinning year-over-year (compared to similar specimens of the same species in similar conditions) is a slow decline indicator — often root or soil stress.
5. Large dead limbs in the canopy
Scan the canopy for branches that have no leaves while the rest of the tree is leafed out. These are dead limbs — and dead limbs over 3 inches in diameter, particularly those over a structure or walkway, are scheduled-pruning candidates at minimum and potential hazards at worst.
6. Co-dominant stems with included bark
Look at how the tree's main structure branches. Does it have one clear central trunk, or does it split into two roughly-equal stems? V-shaped joints between co-dominant stems are mechanical weak points, especially when the bark gets pinched between the stems during growth (called included bark — visible as a dark inclusion line where the stems meet).
“V-shaped joints between co-dominant stems are mechanical weak points. They're the classic hurricane failure mode for mature shade trees.”
7. Root-plate disturbance
Walk around the base of mature trees and look at the soil. Is the surface flat and undisturbed, or is there visible cracking, mounding, or recent soil disturbance on one side? Root-plate lift after a storm — even a tropical-storm-strength event — sometimes shows up as subtle soil cracking around the base.
8. Visible cavities or hollow sounds
Cavities in the trunk are an obvious warning. Less obvious: hollow sounds when you rap the trunk with your knuckles. A solid trunk sounds dull; a hollow trunk sounds resonant or drumlike. Hollow trunks aren't always immediately dangerous (some trees can stand for decades with internal hollows) but they always warrant professional assessment.
9. Heavy fruit or seed-pod loads on weak limbs
Some species (royal poinciana, sweetgum, royal palm) carry significant fruit or seed-pod weight that adds load to weaker structural points. A heavy royal palm fruit cluster on a marginal frond, or a seed-pod-laden limb on a structurally compromised tree, is a fall risk that's worth monitoring.
10. The neighbors' trees
Finally — look beyond your property line. The trees in your neighbor's yard within fall-distance of your house are part of your risk profile. A leaning queen palm or declining laurel oak next door is a potential roof claim against your insurance, regardless of who owns the tree. If you see warning signs on a neighbor's tree, the time to document them (and have a friendly conversation) is now.
Frequently asked.
Can I do this assessment myself and skip a professional walk?
Catching the red flags above gets you 70% of the way. The remaining 30% — internal decay assessment, specific species disease pressure, structural pruning recommendations, formal risk rating — is where the professional walk adds value. For most homeowners, the workflow is: do your own walk annually, get a professional walk every 2–3 years or any time you spot a red flag from this list.
What's the single most important thing to spot?
New lean. A tree that's leaning more than it was last year almost always has compromised root anchoring. The other items on the list are also important, but new lean is the warning that most consistently predicts near-term failure.
How often should I do this walk?
Twice a year minimum: once in April before storm season, once in November after storm season. After any named storm event, do an extra walk to compare against your pre-storm photos. The walk itself takes 15–30 minutes for a typical residential lot.
Got a specific tree you want to talk about?
Send a few photos and we'll come back with a real written quote — or just a second opinion.