September Lawn Care in North Texas: Fertilizing, Watering & Weed Control
By Fallas Landscape | September 2026 | Serving Plano, Frisco, McKinney, Allen & the Greater DFW Area
September in North Texas can feel like an extension of summer. Afternoon temperatures may still climb into the 90s, but shorter days and gradually cooler nights are a reminder that fall is on the way.
For homeowners, this transitional month is one of the most important times of the year for lawn care.
After months of intense Texas heat, your lawn may be showing signs of stress, thinning, weeds, dry patches, or uneven growth. The lawn care decisions you make during September can help your grass recover from summer while preparing its root system for cooler weather and winter dormancy.
At Fallas Landscape, we provide professional lawn maintenance throughout communities including Plano, Frisco, McKinney, Allen, Prosper, Celina, Dallas, Richardson, Carrollton, Garland, Flower Mound, The Colony, Little Elm and surrounding North Texas areas.
Here are some of the most important September lawn care steps North Texas homeowners should consider.
- Give Your Lawn the Right September Fertilizer
North Texas lawns endure months of heat, drought stress and heavy summer use. By September, even a lawn that still looks reasonably green may be depleted of nutrients.
Proper fertilization can help strengthen your turf before temperatures begin dropping.
However, September lawn fertilization should not simply be about forcing rapid green growth. The goal is to support healthy roots and help the lawn recover from summer stress.
Common warm-season grasses in North Texas include:
- Bermuda grass
- St. Augustine grass
- Zoysia grass
Each variety has slightly different nutritional requirements, which is why choosing the right fertilizer is important.
Too much nitrogen late in the season can encourage excessive top growth when the lawn should gradually begin preparing for dormancy. Applying the wrong product or applying too much can also increase the risk of lawn damage.
A professional lawn maintenance program can evaluate the condition of your turf and apply nutrients based on the grass variety, seasonal conditions and overall health of your property.
- Don’t Stop Watering Just Because Summer Is Ending
One of the biggest lawn care mistakes North Texas homeowners make during September is dramatically reducing watering too early.
Although fall is approaching, September can still bring hot temperatures and extended periods without meaningful rainfall.
Your lawn still needs moisture.
The key is to transition from frequent summer watering toward deeper, more efficient watering.
In most situations, deep watering encourages grass roots to grow farther into the soil. A stronger root system helps your lawn tolerate both drought and temperature changes.
Rather than automatically running your irrigation system on the same summer schedule, begin monitoring:
- Rainfall
- Soil moisture
- Daytime temperatures
- Grass color
- Signs of drought stress
- Water runoff
If the lawn begins looking slightly gray or bluish-green, footprints remain visible after walking across the grass, or blades begin folding inward, your lawn may be experiencing moisture stress.
- Water Early in the Morning
When you water is almost as important as how much you water.
For most North Texas landscapes, early morning is generally the best time to irrigate.
Morning watering gives moisture an opportunity to soak into the soil before the heat of the day increases evaporation.
Avoid routinely watering your lawn late at night. Keeping grass wet for extended periods can create conditions that may encourage fungal problems.
A properly designed and maintained irrigation system can also make an enormous difference in water efficiency.
At Fallas Landscape, irrigation planning takes into consideration turf type, plants, drainage, existing water pressure, water usage and the individual characteristics of the property.
- Check Your Irrigation System for Summer Damage
September is also an excellent time to inspect your sprinkler system.
After operating throughout a long North Texas summer, sprinkler heads can become damaged, clogged or misaligned.
Look for:
- Broken sprinkler heads
- Water spraying onto sidewalks or driveways
- Areas receiving too much water
- Dry patches receiving too little water
- Leaking irrigation lines
- Sprinklers blocked by shrubs or plants
- Excessive runoff
Uneven irrigation can create noticeable differences across your lawn.
One section may remain lush and green while another develops dry or thinning grass. Correcting irrigation problems now helps your lawn recover before colder weather arrives.
- Get September Weeds Under Control
Summer lawn stress often creates opportunities for weeds.
Thin turf allows sunlight to reach the soil surface, giving unwanted plants room to germinate and spread.
Common weeds can compete with your lawn for:
- Water
- Nutrients
- Sunlight
- Growing space
September is an important month for addressing existing weeds while also planning ahead for cooler-season weed problems.
The best weed control strategy depends on the type of weed, the turf variety and the overall health of the lawn.
Simply applying a general weed killer across the entire lawn may not always be the best approach.
Professional lawn treatments can target weed problems while minimizing unnecessary stress on desirable turf.
- Prepare Now for Winter Weeds
September lawn care isn’t only about the weeds you can see.
Many winter weeds begin germinating as soil temperatures gradually decline during fall.
That means preventative lawn care can be extremely valuable.
A properly timed pre-emergent treatment may help prevent certain weed seeds from developing into mature plants later in the season.
Timing matters.
Applying pre-emergent too early or too late can reduce its effectiveness, which is one reason seasonal lawn maintenance is so important in North Texas.
- Continue Mowing Your Lawn Regularly
Your lawn may grow more slowly as fall approaches, but mowing should continue through September.
Avoid suddenly cutting the lawn extremely short in an attempt to reduce future mowing.
Removing too much of the grass blade at one time can stress the turf, especially while temperatures remain hot.
Continue mowing at an appropriate height for your grass variety and keep mower blades sharp.
Sharp mower blades produce a cleaner cut.
Dull blades tear the grass rather than cutting it, leaving ragged edges that can make the lawn appear brown and potentially increase susceptibility to stress and disease.
- Watch for Bare and Thinning Areas
September is an excellent time to walk around your property and inspect areas that may have struggled during summer.
Look for:
- Thin grass beneath trees
- Bare patches
- Compacted soil
- Areas damaged by foot traffic
- Irrigation problems
- Insect damage
- Poor drainage
- Lawn disease
It is important to determine why the grass is struggling before attempting to fix it.
For example, adding fertilizer will not solve a lawn problem caused by poor drainage or insufficient sunlight.
Likewise, increasing irrigation may make a fungal problem worse.
Identifying the underlying cause allows you to choose the right solution instead of simply treating the symptoms.
- Don’t Forget Your Landscape Beds
September lawn care should also include the areas surrounding your turf.
Cleaning landscape beds, removing weeds, trimming appropriate plants and checking mulch can make the entire property look more polished.
Mulch is particularly valuable in North Texas because it can help:
- Retain soil moisture
- Moderate soil temperature
- Reduce weed growth
- Protect plant roots
- Improve the appearance of landscape beds
If summer heat has broken down or displaced your mulch, September is a good time to evaluate whether additional mulch is needed.
- Start Preparing Your Landscape for Fall
September is the bridge between the extreme conditions of a North Texas summer and the milder temperatures of fall.
Instead of waiting until your lawn becomes dormant, use this month to strengthen the landscape.
A solid September lawn care plan may include:
- Seasonal fertilization
- Appropriate irrigation
- Sprinkler inspection
- Weed control
- Pre-emergent planning
- Regular mowing
- Edging
- Landscape bed maintenance
- Mulching
- Identifying summer lawn damage
Taking care of these items now can make fall maintenance easier and help your property enter winter in better condition.
Professional Lawn Maintenance for North Texas Homes
A beautiful North Texas lawn requires more than occasional mowing.
Heat, clay-heavy soils, drought conditions, changing rainfall, weeds, irrigation problems and seasonal temperature swings all affect how your landscape performs.
Fallas Landscape provides complete lawn maintenance and landscaping services designed around the unique needs of North Texas properties.
Our maintenance services include mowing and edging, trimming and pruning, irrigation repair, chemical applications and other seasonal landscape care.
Whether you’re maintaining an established landscape or looking to improve the overall appearance of your outdoor space, our team can help keep your property looking its best throughout the year.
Fallas Landscape proudly serves homeowners throughout Plano, Frisco, McKinney, Allen, Dallas, Prosper, Celina, Richardson, Fairview, Parker, Carrollton, Garland, Flower Mound, Lewisville, The Colony, Little Elm and surrounding DFW communities.
Get Your North Texas Lawn Ready for Fall
September is the ideal time to address the effects of summer and prepare your lawn for the cooler months ahead.
If your grass is struggling, weeds are taking over, your irrigation system needs attention, or you simply want professional help keeping your landscape healthy, contact Fallas Landscape.
Call Fallas Landscape at 972-517-LAWN (5296) to request a free estimate and learn more about professional lawn maintenance and landscaping services in North Texas.
