Fertilization & Weed Control in O'Fallon, MO

A five-round fertilization and weed control program for O'Fallon lawns, timed to Missouri soil temperatures by the crew based right here on Hwy P.

Call (636) 293-9306
Porter's Lawn Service trailer and mower on a healthy, weed-free lawn in O'Fallon, Missouri

Lawn treatments in our home city

Our shop is at 2743 Hwy P in O'Fallon, and the lawns we treat here are the ones we drive past every day. Nearly all of them are tall fescue on clay, from the older streets near Fort Zumwalt Park to WingHaven, Hutchings Farm, and the subdivisions along Highway K. Fescue on clay needs feeding in fall more than spring, crabgrass prevention before the forsythia finishes blooming, and broadleaf control through the growing season.

Our program runs five rounds: early spring fertilizer with crabgrass pre-emergent, late spring feeding with broadleaf control, a summer treatment with spot-spraying, early fall fertilizer, and a late fall winterizer. Each application is timed to soil temperature rather than a calendar date, and you get a note after every visit with what went down.

What the program includes

Early spring fertilizer with crabgrass pre-emergent

Late spring feeding with broadleaf weed control for dandelions, clover, henbit, and plantain

Summer treatment timed for heat, with spot-spraying of weeds that break through

Early fall fertilizer to rebuild roots after summer stress

Late fall winterizer so the lawn greens up early next spring

A note after each visit on what was applied and what to watch for

Want the full picture of this service? Read our Fertilization page, or see everything we do on the O'Fallon service area page.

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How fertilization & weed control works in O'Fallon

From the first call to a finished yard, here is what to expect.

Tell us about your yard

Call (636) 293-9306 or send the form with your O'Fallon address and what you need. We reply the same business day.

We measure and quote the lawn

The price is based on your O'Fallon lawn's square footage. You get a per-application price and the full season schedule up front.

Applications on schedule

Each round goes down in its window, timed to soil temperature rather than a calendar date. You do not need to be home.

A thicker lawn each year

Dense turf crowds out weeds on its own. By the second season most lawns need far less spot treatment.

Weeds we see most in O'Fallon

Dandelion, clover, and henbit show up in every O'Fallon lawn by April, crabgrass fills thin spots by June, and nutsedge pops in the low, wet corners of WingHaven and the newer subdivisions where drainage is poor. Violets are the stubborn one in the older neighborhoods. The spring and summer rounds handle the first group, and nutsedge and violets get their own product on the summer and fall visits. A thick fall overseeding finishes the job by leaving weeds nowhere to start.

What fertilization costs in O'Fallon

Fertilization and weed control in O'Fallon is priced per application, quoted for free from a measurement of your turf. The price depends on:

Lawn square footage. Product is applied by area, so a larger lawn costs more per round.

Number of rounds. The standard program is five applications. Lawns coming off a rough year sometimes add a sixth.

Current condition. A lawn that is mostly weeds needs heavier broadleaf treatment the first season.

Add-ons. Grub control, fall aeration, overseeding, and lime for acidic soil can be added to the program.

Dense green turf after a fertilization program in O'Fallon, MO

Fertilization & Weed Control questions from O'Fallon homeowners

Before soil temperatures hold around 55 degrees, which in O'Fallon is usually late March to early April, about when forsythia blooms. Miss that window and the pre-emergent cannot stop seed that has already sprouted.
Five is the standard for tall fescue in St. Charles County: early spring, late spring, summer, early fall, and late fall. Zoysia lawns get a different schedule weighted toward summer.
Once the application has dried, usually within an hour or two, the lawn can be used normally. We leave a flag and a note after each visit so you know when it went down.
Yes. Both need a different product than ordinary broadleaf killer, and we treat them on the summer and fall rounds. Violets take a couple of seasons to fully knock back.
Yes. Fertilizer does its best work on a lawn that is mowed high and watered deeply about once a week in summer. Pair the program with our mowing in O'Fallon and we coordinate both.

Start a lawn program in O'Fallon

Call (636) 293-9306 or send the form and we will measure your O'Fallon lawn and send a per-application price with the season schedule.

Call (636) 293-9306
Porter's Lawn Service truck and mower at a property in O'Fallon, Missouri