Mangroves Legally Protected in Florida: Trimming, Permits, Penalties

Florida’s mangrove trimming laws protect three native species under the Mangrove Trimming and Preservation Act, and they set firm limits on what a property owner or contractor can cut, when a permit is required, and what a violation costs. The rules live in Florida Statutes Sections 403.9321 through 403.9333.¹ Some trimming can be done without a permit if you stay inside narrow height and length limits. Anything that removes, defoliates, or destroys a mangrove requires a permit, and getting it wrong triggers restoration orders, per-tree fines, and in serious cases criminal charges.

Which Trees Are Actually Protected

The Act covers red mangrove (Rhizophora mangle), black mangrove (Avicennia germinans), and white mangrove (Laguncularia racemosa).² Those three, and only those three.

Buttonwood (Conocarpus erectus) often grows next to mangroves and is sometimes called one, but it isn’t a protected species under this Act. If you can’t tell the trees apart, have them identified before any cutting starts. Misidentification is not a defense.

Trimming vs. Alteration

The whole permitting scheme turns on one distinction. Trimming means cutting branches, twigs, limbs, and foliage. Alteration means removing, defoliating, or destroying the mangrove itself.³

Trimming, done correctly, can often happen without a permit. Alteration almost always requires one. And using herbicides or other chemicals to strip mangrove foliage is prohibited outright, no permit available.⁴

When You Can Trim Without a Permit

The exemption is narrower than most homeowners expect. To qualify, the mangroves have to sit within a “riparian mangrove fringe”: trees that extend no more than 50 feet waterward from the most landward trunk, measured perpendicular to the shoreline.³ Mangroves on uninhabited islands, public conservation land, or designated mitigation areas do not count as fringe and get no exemption.

Inside the fringe, the rules scale with tree height and shoreline length:

Mangroves up to 10 feet tall can be trimmed by the property owner, without a permit, on shorelines of 150 feet or less. No mangrove can be cut shorter than 6 feet from the substrate.
Mangroves over 10 feet tall still qualify for the exemption, but a Professional Mangrove Trimmer must perform or directly supervise the work.
Mangroves 16 feet or taller must be trimmed in stages, with no more than 25 percent of the foliage removed in any year.

If your shoreline is longer than 150 feet, no more than 65 percent of the mangroves along it can be trimmed under the exemption.³ Chemical defoliation is never permitted, at any height or length.

When You Need a Permit

Anything outside those exemption limits requires either a general permit or an individual permit.

General Permits

A general permit covers trimming of mangroves that extend up to 500 feet waterward from the most landward trunk, provided a Professional Mangrove Trimmer performs or supervises the work. No more than 65 percent of the mangroves exceeding 6 feet along the shoreline can be trimmed, and no individual mangrove can be cut below the 6-foot floor.⁵ Separate general permits exist for trimming in navigational channels, basins, and canals where boat clearance is needed.

Individual Permits for Alteration

Removing, destroying, or defoliating a mangrove is alteration, and it requires an individual permit under Section 403.9328.⁴ These applications go to Florida Department of Environmental Protection district offices, or to the local government in delegated areas.⁶ Site visits and public notice are part of the review. Approval often comes conditioned on mitigation, typically at a 2-to-1 ratio (two units of mangrove canopy created or restored for every unit affected), or a payment to an approved mitigation fund at a minimum of $4 per square foot of the wetland area that would otherwise be required.⁷

Where Local Rules Replace State Rules

FDEP administers the Act, but several local governments have received delegated authority to run permitting and enforcement in their jurisdictions: Miami-Dade County, Broward County, Hillsborough County, Pinellas County, Sarasota County, the Town of Jupiter Island, and the City of Sanibel.⁸ If your property sits in one of those, you apply to the local government instead of FDEP, and the local government may add its own penalties on top of the state’s.

Who Is Allowed to Do the Cutting

Much of what the law allows depends on using a Professional Mangrove Trimmer. This is not a category any landscaper falls into by default. To be qualified, a person must show they have completed at least 10 mangrove-trimming projects previously authorized by FDEP or a delegated local program, submit a notarized sworn statement that they have no current violations, and prove they can correctly identify the three protected species.⁹ FDEP has 60 days to grant or deny an application.

Florida-certified landscape architects qualify without going through that separate application. Delegated local governments can set up their own qualification programs and may require PMTs working locally to register there as well.¹⁰ Before hiring someone, ask for documentation of PMT status. If the person doing the work isn’t actually qualified, you as the property owner still share the liability for whatever they cut.

Penalties for Illegal Trimming or Removal

The penalty structure has real teeth, and the liability reaches everyone involved.

Restoration for a First Violation

A first offense requires the property owner to restore the damaged mangroves. Restoration must produce a functioning mangrove community that offsets the damage caused. The applicant, the landowner, and the person who did the trimming are jointly and severally liable, meaning FDEP can pursue any of them for the full cost.⁷

Per-Tree Fines for Repeat Violations

Second and later violations layer monetary penalties on top of restoration:

Up to $100 per mangrove illegally trimmed.
Up to $250 per mangrove illegally altered.
An additional $250 per mangrove against a Professional Mangrove Trimmer who commits a second or later violation, on top of the standard fines.⁷

These per-tree amounts add up quickly along a cleared shoreline.

Criminal Exposure

Florida’s broader environmental enforcement statute also applies. Willfully violating a permit requirement or failing to obtain a required permit is a first-degree misdemeanor, carrying up to $10,000 in fines or six months in jail, or both, per offense.¹¹ Reckless-indifference violations are second-degree misdemeanors with the same $10,000 fine cap and up to 60 days in jail. Willful violations of the chapter’s substantive provisions can be charged as third-degree felonies, with fines up to $50,000 or up to five years in prison. Each day a violation continues is a separate offense.

Civil Penalties

The state can also seek civil penalties of up to $15,000 per offense per day under Section 403.141, plus the costs of tracing the violation, controlling the damage, and restoring the environment.¹² Delegated local governments are not capped at the state amounts and can impose additional fines under their own authority.

Hiring a Contractor Does Not Shield You

Owners sometimes assume that hiring a landscaping company transfers the risk. It doesn’t. Under the Act, the landowner and the person performing the work are jointly and severally liable for both restoration and penalties.⁷ If a contractor over-trims your shoreline or crosses into alteration, FDEP can pursue you for the full restoration cost no matter what your agreement with the contractor says.

Before any cutting starts, confirm three things: that the trees are true mangroves, that whatever the plan calls for stays within the exemption limits or is covered by a valid permit, and that the person doing the work holds current Professional Mangrove Trimmer status. Getting any of those wrong is expensive.

1
The Florida Legislature. Florida Statute 403.9321 – Short Title
2
Florida Senate. Florida Statute 403.9325 – Definitions
3
Florida Senate. Florida Code 403.9326 – Exemptions
4
Florida Senate. Florida Code 403.9328 – Alteration and Trimming of Mangroves; Permit Requirement
5
The Florida Legislature. Florida Statute 403.9327 – General Permits
6
Florida Department of Environmental Protection. Mangroves
7
Florida Senate. Florida Code 403.9332 – Mitigation and Enforcement
8
Florida Department of Environmental Protection. Mangrove Trimming – Delegated Local Governments
9
Florida Senate. Florida Code 403.9329 – Professional Mangrove Trimmers
10
The Florida Legislature. Florida Statute 403.9329 – Professional Mangrove Trimmers
11
Florida Senate. Florida Statute 403.161 – Prohibitions, Violation, Penalty, Intent
12
The Florida Legislature. Florida Statute 403.141 – Civil Liability; Joint and Several Liability