Fall lawn fertilizer in Winter Garden and Horizon West: Orange County rules and UF/IFAS timing

By the Orlando West editorial team · Reviewed October 20, 2026 · Updated October 20, 2026 · Sources: UF/IFAS Lawn, UF/IFAS EDIS, NWS Melbourne, FDACS

Every October the same question pops up on west Orange neighborhood groups: the summer fertilizer ban just ended, so should I feed my lawn now? The bags are back on the front shelves, a neighbor’s yard looks a shade greener, and the HOA newsletter has a reminder about “fall lawn care.”

The honest answer for most Winter Garden and Horizon West lawns is: a light, slow-release feeding in early fall can make sense, a heavy one late in the season usually doesn’t, and the county has firm rules either way. This guide walks through what the Orange County fertilizer ordinance actually says, what UF/IFAS recommends for St. Augustine and Bahia in Central Florida, and what to ask a lawn crew before anyone opens a bag.

Orlando West Lawn Care is a matching service. We connect Winter Garden, Horizon West, Clermont, and nearby west Orange homeowners with a local licensed lawn crew. We do not sell fertilizer, quote fixed prices, or publish one feeding schedule for every street. Treat this as a plain-English summary of public guidance, and check the primary sources linked below before you spread anything.

The Orange County rules in one place

Orange County’s Fertilizer Management Ordinance (Chapter 15, Article XVII of the county code, most recently amended by Ordinance 2022-03, effective June 1, 2022) sets the ground rules. UF/IFAS Extension Orange County summarizes them like this:

June 1 – September 30 (the “blackout” period)

No fertilizer containing nitrogen (N) or phosphorus (P) may be applied in Orange County.

October 1 – May 31

Phosphorus is not allowed unless a soil test shows a phosphorus deficiency.
If you use nitrogen fertilizer, at least 65% of the nitrogen must be slow-release.
No more than 1 pound of nitrogen per 1,000 square feet at one time.
No lawn may receive more than 3 pounds of nitrogen per 1,000 square feet per year.

Year-round

No fertilizer within 25 feet of waterways, and keep a 10-foot low-maintenance zone next to water bodies.
Use deflector shields on broadcast spreaders near streets, storm inlets, ditches, and waterways.
Keep fertilizer and grass clippings off streets and driveways.
Don’t apply fertilizer during severe weather advisories. The county’s homeowner flyer also says not to fertilize in the 24 hours before an expected storm or heavy rain.

So “the ban is over” is true, but October 1 does not mean anything goes. It means you can apply nitrogen in limited, mostly slow-release amounts, and still no phosphorus without a soil test.

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City limits and Clermont

Much of Horizon West sits in unincorporated Orange County, where the county ordinance applies directly. Winter Garden is its own city, and cities can adopt their own fertilizer rules, so if you’re inside city limits it’s worth a quick check of the City of Winter Garden code or a call to city staff. Clermont is in Lake County, not Orange, so the Orange County numbers above are not automatically the rule there. Check the City of Clermont and Lake County requirements before borrowing a west Orange schedule.

Your HOA may also have its own landscape standards. Those can’t loosen the county rules, but they can add to them.

What UF/IFAS says about fall timing

The ordinance tells you what’s legal. UF/IFAS tells you what’s actually useful for the grass.

UF/IFAS’s St. Augustinegrass for Florida Lawns (ENH5/LH010) says fertilizer should go on St. Augustine in two to six applications from spring green-up through fall in north and central Florida, and it’s specific about the ends of the season: don’t apply too early in spring, and “do not fertilize too late in the year after growth has subsided.” The same publication puts the first application of the year in early April in central Florida.

What that means on a typical Horizon West or Winter Garden lot:

Early October is the practical fall window. Days are still warm, St. Augustine is still growing, and a light slow-release feeding can help the lawn recover from summer stress going into the cooler months.
By November and into winter, growth is slowing. Nitrogen applied then isn’t used well by the grass, and a soft, pushed lawn is not what you want heading into the first cold fronts. (Our frost and freeze guide covers what cold snaps do to St. Augustine and Bahia.)
There’s no need to “make up” for the summer blackout by doubling up in October. The county’s 1-pound-at-a-time and 3-pounds-per-year caps exist precisely to stop that.

UF/IFAS also notes that a newer sodded lawn on sandy soil usually needs more fertilizer than a lawn that’s been fed for years, and that shaded grass needs less than grass in full sun. That’s very relevant here: a two-year-old Horizon West lot on fill sand and an established Winter Garden yard under live oaks are not the same lawn, even if they’re a mile apart.

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Yellow grass isn’t always hungry grass

Before you reach for a high-nitrogen bag because the lawn looks pale, note one more point from UF/IFAS: on high-pH soils, yellowing St. Augustine can be an iron or manganese deficiency rather than a nitrogen one. Iron can green the lawn up, but IFAS is clear that iron is not a substitute for nitrogen, and nitrogen won’t fix an iron problem. Yellow patches can also be disease. In fall, large patch on St. Augustine shows up as tan-to-orange rings, and extra nitrogen during an active outbreak can make it worse.

This is where a soil test earns its keep. UF/IFAS Extension Orange County runs a plant clinic and accepts soil samples for pH testing, and the UF/IFAS Extension Soil Testing Laboratory handles full nutrient analysis. Remember too that under the county rules, a soil test is the only way phosphorus becomes legal on an Orange County lawn.

St. Augustine vs. Bahia in fall

Most west Orange HOA fronts are St. Augustine, with Bahia common on larger lots, side yards, and older properties. (See St. Augustine vs Bahia for west Orlando HOAs if you’re not sure which you have.)

St. Augustine responds visibly to a modest fall feeding and is the grass most homeowners are thinking about when they ask this question.
Bahia is a low-input grass. UF/IFAS treats it as a lawn that does fine on less fertilizer than St. Augustine, and pushing it with nitrogen mostly buys you more mowing. For a lot of Bahia yards, a fall feeding is optional at best.

Whichever grass you have, mowing still matters more than fertilizer for how the lawn looks week to week. Keep St. Augustine at the UF/IFAS height of 3.5 to 4 inches for standard cultivars, take no more than one-third of the blade per cut, and don’t scalp before winter.

Lakes, ponds, and retention edges

West Orange is full of water: Lake Apopka to the north, the Butler Chain to the south, and retention ponds behind half the homes in Horizon West. The 25-foot no-fertilizer rule and the 10-foot low-maintenance zone apply to all of them under the county ordinance, and they’re the rules homeowners most often miss when a crew broadcasts across a backyard that slopes down to a pond.

Practical points:

Measure from the water’s edge, not from your fence. On many pond lots, the strip behind the fence counts.
Ask any crew how they handle the buffer: whether they stop broadcasting at 25 feet, and whether their spreader has a deflector.
Sweep or blow any granules (and clippings) off driveways, sidewalks, and the street. Storm drains in these subdivisions run straight to the ponds. Our mulching vs. bagging guide covers the clippings side of the same rule.

Who can legally fertilize your lawn for pay

This catches people out when they hire someone informally. In Florida, anyone who applies fertilizer to residential or commercial landscapes for pay must hold a Limited Certification for Commercial Fertilizer Application from the Florida Department of Agriculture and Consumer Services (FDACS), which requires completing the Green Industries Best Management Practices (GI-BMP) training. Orange County’s ordinance also sets training requirements for commercial applicators.

That’s a reasonable thing to ask a lawn crew about: “Who on your team applies fertilizer, and do they hold the FDACS fertilizer certification?” A legitimate company won’t mind the question.

How fertilizer fits a weekly lawn service

Many homeowners assume fertilizing is part of a standard mowing visit. Often it isn’t. A typical weekly mowing service covers the cut, edging, string trimming, and blowing off hard surfaces. Fertilization, weed control, and pest treatments are frequently a separate program, sometimes from the same company and sometimes from a different licensed provider. Our guide to what a weekly lawn service should include explains where the line usually falls.

If you’d like one crew to handle both, say so up front. Useful notes to include when you request a matched crew:

Grass type (St. Augustine, Bahia, or mixed) and roughly how old the lawn is
Whether you’ve fertilized this year, and roughly when and with what
Any pond, lake, or retention edge on the lot
Whether you want fertilizer included or mowing only
Any yellow or brown patches you’ve noticed, so the crew can look before feeding
HOA landscape rules that matter to you

We serve homeowners across the west Orange corridor, including Horizon West, Winter Garden, and Clermont.

Quick fall checklist

Confirm whether the Orange County ordinance, a city rule, or Lake County rules apply to your address.
If you feed, do it in early fall while the grass is still growing, not after growth slows.
Use a product with at least 65% slow-release nitrogen and no phosphorus unless a soil test says otherwise.
Stay at or under 1 lb N per 1,000 sq ft per application and 3 lb per year.
Keep 25 feet from water and use a deflector near streets and drains.
Clean granules and clippings off hard surfaces.
If you hire it out, ask about the FDACS fertilizer certification.
Keep mowing at the right height. That does more for the lawn than any bag.

The bottom line

October 1 opens the door to fertilizing again in Orange County, but the county caps how much and what kind, and UF/IFAS says the useful window closes once growth slows. For most Winter Garden and Horizon West lawns that means one light, slow-release feeding in early fall at most, nothing near the water, and steady mowing through the cool season. If you’d rather have a local licensed crew handle the mowing (and the fertilizer, if you want it), tell us about your lawn and we’ll match you.

This article summarizes public guidance from Orange County, UF/IFAS, and FDACS as of October 2026. Rules can change; check the linked sources for your address before applying fertilizer.

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