Around Charlotte Harbor, most local governments ban lawn and landscape fertilizer containing nitrogen or phosphorus during the summer rainy season, usually June 1 through September 30. The details depend on your address: North Port starts its turf restriction on April 1, Cape Coral can add May, and several ordinances set fertilizer-free zones along the water. This page summarizes the rules as of November 2026; confirm the current ordinance with your county or city before you buy or spread fertilizer. It is a summary, not legal advice.
Which rule applies to your yard
Start by finding out whether the property is inside city limits or in an unincorporated part of the county. A mailing address can name a city the property is not actually in. County property appraiser maps or the planning office will tell you which government's rules apply.
This matters most in Lee County, where the county ordinance covers unincorporated areas and each city has its own. Englewood straddles the Charlotte-Sarasota county line, so check which side you are on.
Restricted periods around the harbor
Read each row in full: a seasonal ban, a waterfront buffer and a product requirement can all apply to the same yard.
| Jurisdiction | Restricted period | What is restricted | Other rules worth knowing |
|---|---|---|---|
| Charlotte County | June 1 through September 30 | Fertilizer containing nitrogen or phosphorus on residential or commercial turf and landscape plants | County notices repeat the dates each spring |
| City of Punta Gorda | June 1 through September 30 (Ordinance 1710-12, adopted June 6, 2012) | Fertilizer containing nitrogen and/or phosphorus on turf and landscape plants | At least 50% slow-release nitrogen; no more than six applications a year to the same area |
| Lee County, unincorporated | June 1 through September 30 (Ordinance 08-08, 2008; repeated in the county's 2026 reminder) | Fertilizer containing nitrogen or phosphorus on turf and landscape plants | County advice: keep fertilizer at least 10 feet from water and off hard surfaces; skip it when heavy rain is forecast |
| City of Cape Coral | June 1 through September 30; the City Manager may extend it to include May (Ordinance 79-21, 2021) | Nitrogen and phosphorus fertilizer; also banned during any flood, tropical storm or hurricane watch or warning | No fertilizer within 15 feet of the top of a seawall or any water body; at least 50% slow-release nitrogen |
| Sarasota County and City of Venice | June 1 through September 30 (county ordinance in place since 2007) | Nitrogen or phosphorus fertilizer on turf or landscape plants; Venice follows the county ordinance | At least 50% slow-release nitrogen the rest of the year; 10-foot buffer from water with a deflector shield; nothing on impervious surfaces |
| City of North Port | April 1 through September 30 (Ordinance amendment 2023-14, May 2023) | Nitrogen and phosphorus fertilizer on turf grass | Landscape plants may still be fertilized in that period with at least 50% slow-release nitrogen; the city asks residents not to fertilize within 10 feet of a waterway or swale |
Sources: county and city ordinances and notices, and UF/IFAS Sarasota County Extension, checked November 2026. Ordinances are amended from time to time, so confirm dates, buffers and exemptions with the government that covers your property.
The local rules sit on top of a state baseline. Florida law (section 403.9337, Florida Statutes) requires counties and cities that contain nutrient-impaired waters to adopt at least the state's Model Ordinance for Florida-Friendly Fertilizer Use on Urban Landscapes, and many Southwest Florida governments chose stricter rules, including the summer bans above.
Why the rainy season matters
A summer downpour can move fertilizer before roots take it up. Water running across a yard carries nutrients to street drains, swales and canals, and water soaking through sandy soil carries dissolved nitrogen down to the shallow groundwater that feeds the same canals. When soils stay saturated for weeks, turf takes up less, so more is left to wash away.
Nitrogen and phosphorus feed algae as readily as they feed grass. Extra nutrients can encourage algal growth in canals and the harbor, though a bloom also depends on light, temperature, salinity and water movement. The summer restrictions cut one avoidable source; they do not fix water quality by themselves. The water quality data guide shows how nutrient levels are tracked, and the page on the Peace, Myakka and Caloosahatchee follows runoff from inland yards to the coast.
Read the label and protect the water's edge
The three numbers on a fertilizer bag give nitrogen, phosphorus and potassium. A middle number of zero means no phosphorus. "Slow-release" describes how quickly nitrogen becomes available; it does not make nitrogen fertilizer legal during a ban.
Outside the restricted season, slow-release requirements and phosphorus rules still apply. Several ordinances allow phosphorus only where a soil test shows a deficiency, so check before buying a product with a non-zero middle number.
Respect the fertilizer-free zone along seawalls, canals and ponds, and check how your ordinance measures it. Keep granules off driveways and sidewalks, where the next rain carries them straight into storm drains, and sweep any spills back onto the lawn or into the bag.
Caring for the yard through summer
The summer bans do not stop mowing or watering, which follow their own local schedules. Products without nitrogen or phosphorus, such as some iron or micronutrient treatments, may be allowed; check the ordinance and the full label, because compost and organic products also contain nutrients and are not automatically exempt.
The UF/IFAS Florida-Friendly Landscaping program is built on nine principles: right plant, right place; water efficiently; fertilize appropriately; mulch; attract wildlife; manage yard pests responsibly; recycle yard waste; reduce stormwater runoff; and protect the waterfront. In practice:
- Choose plants suited to your sun, soil and drainage so they need less feeding.
- Water only when the soil is dry, and never just before a storm.
- Mow high for your turf type and blow clippings back onto the lawn, not into the street.
- Mulch bare soil, keeping mulch away from drains and swales.
- Leave or plant a strip of low-maintenance vegetation along the water.
- Identify a pest before treating it, and treat only the affected area.
If you hire a lawn service, ask about certification. Florida requires commercial fertilizer applicators to hold a state limited certification for urban landscape commercial fertilizer application, which includes Green Industries Best Management Practices training. Fertilizer is only one household nutrient source; septic systems and sewer connections are the other big one. If you notice green or discolored water in a canal, the algae check explains how to find out what it is.
Frequently Asked Questions
Can I use slow-release fertilizer during the summer ban?
Not if it contains nitrogen or phosphorus and your ordinance bans those nutrients in summer. Slow release only changes how fast the nitrogen becomes available. North Port's exception for landscape plants is the main local variation.
Will iron keep my lawn green in summer?
Iron can improve color when the grass is short of iron, but it will not fix every cause of yellowing. Check the ordinance and make sure the product contains no nitrogen or phosphorus.
Is compost exempt from the ban?
Do not assume so. Compost contains nutrients, and how it is treated depends on the ordinance. Check with your county or city before spreading it in summer.
Should I fertilize right before the ban starts?
Not if heavy rain is coming or the lawn does not need it. A heavy application just before the summer rains arrive is exactly what the rules aim to avoid, and your county Extension office can advise on timing.