Fertilization & Weed Control in St. Charles, MO

A five-round fertilization and weed control program for St. Charles lawns, from shaded Old Town lots to full-sun subdivisions off Highway 94. About twenty minutes from our shop.

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

Lawn treatments in St. Charles

St. Charles is about twenty minutes from our shop at 2743 Hwy P in O'Fallon. The lawns near Frontier Park and in Frenchtown sit in deep shade and fight moss and violets. New Town's small lawns take heavy foot traffic. The subdivisions south of I-70 are sunny fescue on clay with crabgrass and clover pressure. One program with the right adjustments handles all three.

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. We measure the turf for a per-application price, lighten the feeding on shaded lawns, and leave a flag and a note after every visit so you know when the lawn is ready to use.

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 St. Charles service area page.

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How fertilization & weed control works in St. Charles

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 St. Charles address and what you need. We reply the same business day.

We measure and quote the lawn

The price is based on your St. Charles 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.

Pre-emergent timing in St. Charles

Crabgrass germinates once daily highs settle around seventy degrees, which in St. Charles usually means late March to early April, about when the forsythia along the older streets blooms. The pre-emergent has to be down before that, so the first round goes out early and we do not wait for a nice-looking lawn to start. A thick fall overseeding makes the following spring's pre-emergent far more effective by leaving less open soil.

What fertilization costs in St. Charles

Fertilization and weed control in St. Charles 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 St. Charles, MO

Fertilization & Weed Control questions from St. Charles homeowners

Before soil temperatures hold around 55 degrees, which in St. Charles 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 St. Charles and we coordinate both.

Start a lawn program in St. Charles

Call (636) 293-9306 or send the form and we will measure your St. Charles 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 St. Charles, Missouri