Pre-emergent & post-emergent
Pre-emergent treatments block weed seeds like crabgrass before they sprout, while post-emergent applications knock out broadleaf and grassy weeds that have already taken hold-so your lawn stays clean from the soil up.
Professional Weed Control
Serving St. Louis County and St. Charles County, Missouri
Pre-emergent and post-emergent treatments that stop crabgrass, dandelion, clover, and nutsedge while protecting your turf.
Targeted weed control across St. Louis, MO & nearby communities
For over 10 years, Porter's Lawn Service has helped homeowners and businesses in Cottleville, St. Charles, O'Fallon, Wentzville, and the greater St. Louis area get the upper hand on stubborn weeds. We stop broadleaf and grassy invaders like crabgrass, dandelion, clover, and nutsedge with timed, selective treatments built around Missouri's soil and seasons.
Selective, turf-safe treatments
We target dandelion, clover, nutsedge, and other invaders with selective products that protect your grass. Over time, a thick, healthy lawn crowds out weeds on its own across lawns, beds, and hardscapes.
Seasonal application timing
Weed control only works when it lands at the right moment. We schedule applications around Missouri's seasons-early spring, summer, and fall-so every treatment hits when weeds are most vulnerable.
Why Porter's Lawn Service
Locally owned, licensed, and built to take care of properties the right way.
- Locally owned, licensed and insured, with deep experience in St. Louis-area turf, soil, and the weeds it grows.
- Selective, quality products applied with commercial-grade equipment for thorough, turf-safe results.
- Technicians who identify each weed and time treatments correctly-stopping problems early instead of chasing them.
- We stand behind our work and prioritize clear communication on every property.
Not satisfied? We'll make it right. Call (636) 293-9306 for a free consultation and estimate.
What St. Louis homeowners say about our weed control
5-star Google reviews from clients across Cottleville, St. Charles, O'Fallon, and Wentzville.
Chris Jansson
“Excellent service! Shane helped us level up our front yard, advised us on a beautiful decorative tree, relocated some stubborn boxwoods, and made the whole process smooth and stress-free.”
Emily George
“Great company, Shane and his crew always take care of me!!! Lawn always looks fantastic.”
Timmy Peters
“I've used Porters for a couple of years now. I've always been happy with their service. A very professional business to deal with.”
Anthony Passante
“Shane was very easy to work with. He pays close attention to detail and he hit every deadline I needed him to hit on my project. He is very good with design build landscape and hardscape projects.”
Frequently Asked Questions
Pre-emergent treatments form a barrier in the soil that stops weed seeds, like crabgrass, from sprouting in the first place. Post-emergent treatments target weeds that have already broken through. Most St. Louis and St. Charles County lawns benefit from both, applied at the right times through the season.
We treat the broadleaf and grassy weeds most common to Missouri turf, including crabgrass, dandelion, clover, nutsedge, chickweed, henbit, and thistle. After an inspection we match the products and timing to the specific weeds showing up in your lawn.
Timing is everything. Pre-emergent goes down in early spring before soil temperatures rise and again in fall to head off winter annuals. Post-emergent spot treatments run through the growing season as weeds appear. We schedule applications around Missouri's seasons so each treatment lands when it works best.
No. We use selective treatments designed to target weeds while protecting your turf. Over time, our goal is a thick, healthy lawn that naturally crowds out new weeds, so you rely less on treatments season after season. Contact us to get started.
Weed control is program-basedand priced to your lawn's size, the weeds present, and how many applications it needs through the year. We offer free estimates- contact us or call (636) 293-9306 for a personalized quote.