The Pinellas Tree Care Index: every claim, sourced.

Every number here has a source you can click, and a date. When a Weave’s guide says “laurel oaks live 50–70 years” or “over-pruned palms failed more,” this is where that claim is anchored. Cite freely — the anchor links are stable, and we update this page as the research updates.

Hurricane wind resistance — the UF/IFAS ratings

University of Florida researchers (Duryea & Kampf) studied tree survival across Florida’s hurricane seasons, published as EDIS FR174 (coastal-plain species) and FR175 (tropical species). The tiers most relevant to Pinellas yards:

• Highest wind resistance: live oak, sand live oak, sabal (cabbage) palm, bald cypress, pond cypress. (FR174)
• Medium-high: southern magnolia, sweetgum (FR174); pindo, areca, Phoenix dates, Manila palm (FR175).
• Medium-low: slash, longleaf and loblolly pine (FR174); coconut and royal palm (FR175).
• Lowest: laurel oak, water oak, southern red cedar, sand pine (FR174); queen palm and Australian pine (FR175 — which also notes casuarina is prohibited in Florida).

The study’s own words on the county’s most consequential tree: “laurel oak had poorer overall survival than both live oak and sand live oak in four panhandle Florida hurricanes (p<0.001).”

The laurel oak age wave

UF/IFAS (ENH-707/ST-549) gives laurel oak a lifespan of 50 to 70 years, driven by susceptibility to decay and root rot. Pinellas’s postwar subdivisions planted laurels heavily through the 1960s–70s as fast shade — putting a large share of the county’s biggest hardwoods at or past their design life right now. This single fact explains more Pinellas tree failures than any other on this page.

Lethal bronzing status

Lethal bronzing (a phytoplasma spread by the palm cixiid planthopper) has been isolated in 36 Florida counties and is most prevalent in central Florida — Pinellas sits in the heart of the affected zone. It infects 21+ palm species including queen palms and Florida’s state tree, the sabal (first isolated in sabals in 2008). There is no cure; UF/IFAS PP243 directs that symptomatic or test-positive palms be removed promptly, with preventive trunk injections reserved for high-value healthy palms. (UF/IFAS PP163/PP243.)

The palm pruning standard (and the hurricane-cut evidence)

UF/IFAS ENH1182’s rule for all palms: no living fronds above the horizontal — the 9-and-3 clock positions — should be removed. Potassium is mobile in palms; cutting older fronds forces the palm to strip nutrients from its remaining canopy, accelerating decline. And the storm-season kicker, from the same research program’s post-2004–05 assessments: over-pruned, “hurricane-cut” palms were more likely to have their crowns snapped off than those with fuller crowns. The full canopy is the palm’s own bud protection. (UF/IFAS EP443/ENH1182.)

The two palm verdicts

Ganoderma butt rot (UF/IFAS PP54/PP100): affects all palm species; no treatment or prevention exists; a conk (shelf fungus) on the lower trunk means advanced internal decay — remove the palm, and don’t replant a palm in that spot, because the fungus persists in soil. Frizzle top (UF/IFAS ENH1015/EP267): manganese deficiency in new growth, driven by high-pH soils common in coastal Pinellas; treatable early, fatal ignored — severe cases produce only necrotic stubs before the palm dies.

The legal quick-sheet

F.S. §163.045: no local permit/fee/mitigation for a single-family-home tree with a signed ISA-arborist or FL-landscape-architect assessment finding unacceptable risk (details on our law page). Local thresholds for protected trees around the county run from 4″ DBH (St. Pete shade trees, Largo, Dunedin, Seminole) through 4½” (Pinellas Park) to 6″ (Gulfport) — with unincorporated Pinellas County’s January 2026 code adding a homestead carve-out (only trees over 24″ DBH protected on homesteaded single-family property). Full detail per city in the permit guides.

Sources: ask.ifas.ufl.edu publications FR174, FR175, ST549, PP163, PP100, EP443, EP267; flsenate.gov §163.045; municipal codes as cited in the permit guides. All verified 2026-07-14; next scheduled review June 2027. Where research gives tiers rather than full rankings, we publish only what the source supports.