Not all weeds are treated the same way, and that matters a lot if you want your treatment to actually work. Applying a broadleaf herbicide to a grassy weed does nothing. Using a non-selective product on a weed growing through St. Augustine kills the grass too. Effective weed control in North Texas starts with correctly identifying what you’re dealing with — and that’s trickier than it sounds because many common weeds look similar until you know what to look for. Here’s a practical guide to the weeds most North Texas homeowners encounter, how to recognize them, and how they get treated.
The Big Categories: Know Them First
Weeds fall into a few fundamental categories that drive how they’re treated:
- Broadleaf weeds have wide, flat leaves with branching veins — things like dandelions, clover, and henbit. They’re generally controlled with post-emergent broadleaf herbicides that are selective enough not to harm grass.
- Grassy weeds look like grass because they are grass — crabgrass, dallisgrass, and annual bluegrass are classic examples. These are much harder to control post-emergent because many herbicides that kill grassy weeds also harm desirable turf. Pre-emergent prevention is critical for grassy weeds.
- Sedges look like grasses but have triangular stems (“sedges have edges” is the memory trick). Yellow nutsedge is the most common. Standard grass and broadleaf herbicides don’t touch them — they require a specific sedge-targeted chemistry.
- Annual weeds complete their life cycle in one season and spread by seed. Get them before they go to seed and you interrupt the cycle. Perennial weeds come back from roots year after year — these require more aggressive treatment because killing the top growth isn’t enough.
Common Summer Weeds in North Texas
Crabgrass is the most prevalent summer grassy weed in DFW lawns. It’s a low-growing annual that germinates in spring when soil temps hit 55°F and spreads aggressively through summer, producing thousands of seeds before dying in fall. Crabgrass has wider, flat leaf blades compared to Bermudagrass, and as it matures it develops a distinctive star-shaped seed head with several finger-like stems radiating from a central point. It loves bare spots and thin turf. Pre-emergent applied in late winter/early spring before germination is the most effective control; post-emergent options exist but work best on young plants.
Dallisgrass is a perennial grassy weed that’s one of the most difficult to eliminate in North Texas Bermuda lawns. It forms coarse, clumpy growth that sticks up noticeably above a mowed Bermuda lawn. Dallisgrass seed heads are distinctive — long seed-bearing stems with alternating seed clusters. Because it’s perennial and spreads by both seed and rhizomes, it keeps coming back even after the top growth is killed. Spot treatment with non-selective herbicide, careful re-treatment, and sometimes physical removal are required.
Spurge is a low, mat-forming broadleaf summer annual that’s extremely common in thin turf areas. It has small, oval leaves often with a red or purple spot in the center and grows in a flat, spreading pattern close to the soil. When broken, it releases a milky latex sap — that’s a quick identification hack. It loves bare soil, driveways, cracks, and thin turf edges.
Yellow nutsedge is the bane of irrigated North Texas lawns. It emerges in late spring and grows aggressively through summer, always seeming to outpace the mower. It looks like grass but grows faster, has a triangular stem (roll it between your fingers and you’ll feel the edges), and produces small, yellow-brown seed clusters on top. It spreads by underground nutlets (tubers) that are nearly impossible to fully remove manually. Sedge-specific herbicides like sulfentrazone or halosulfuron are required — regular herbicides don’t work.
Common Winter Weeds in North Texas
Henbit is a winter annual broadleaf weed that germinates in fall, grows through winter, and produces purple flowers in early spring before dying as temperatures rise. It has distinctive rounded, scalloped leaves that grow in pairs along a square stem — that square stem is the giveaway. It’s commonly confused with purple deadnettle, which looks similar but has more triangular upper leaves. Both are controlled the same way: pre-emergent in fall and broadleaf post-emergent in winter if they’ve already emerged.
Annual bluegrass (Poa annua) is a winter grassy weed that germinates in fall, grows through the mild parts of winter, and dies as summer heat arrives — leaving bare patches in warm-season lawns right as they’re trying to green up. It has a lighter, brighter green color than most desirable grasses, a boat-shaped leaf tip, and produces distinctive white seed heads even when very short. Poa annua is very difficult to control post-emergent in Bermuda without damaging the Bermuda. Pre-emergent in early fall is the strategy.
Clover is technically a perennial broadleaf weed in North Texas, though some types behave as annuals. It’s immediately recognizable by its trifoliate leaves (three leaflets per leaf) and white or pink flower balls. Clover is a nitrogen-fixer, which means it actually thrives in low-fertility lawns — its presence can be a sign the turf needs fertilization. Broadleaf herbicides control it effectively, but it will return if the underlying fertility issue isn’t addressed.
Year-Round Troublemakers
Dandelions are perennial broadleaf weeds with a deep taproot that makes hand-pulling largely ineffective unless you get the entire root. The distinctive toothed leaf rosette and yellow flower/white seed ball make them easy to identify. Post-emergent broadleaf herbicides work well, but because the taproot is deep, re-treatment may be needed to fully eliminate established plants.
Dollarweed (Pennywort) is a perennial broadleaf weed with round, coin-shaped leaves on a stem attached in the center of the leaf — it looks almost like tiny lily pads growing in your lawn. It’s a strong indicator of overwatering or poor drainage; it loves wet, consistently moist soil. Broadleaf herbicides control it, but unless the moisture issue is addressed, it keeps coming back.
A Quick Field Identification Cheat Sheet
- Triangular stem when rolled = sedge (needs sedge-specific treatment)
- Milky sap when broken = spurge
- Square stem = henbit or deadnettle
- Three leaflets per leaf = clover
- Coin-shaped leaves on center stem = dollarweed
- Star-shaped seed head = crabgrass
- Coarse clumpy grass sticking up above Bermuda = likely dallisgrass
Correct identification is step one, but correct timing and product selection are what actually get results. Most homeowners find that a professionally managed weed control program is far more effective than spot-treating with off-the-shelf products — because it combines the right chemistry, the right timing (pre-emergent before germination, post-emergent at the right growth stage), and the right application rate. Find out how our full weed program works at our weed control and fertilizer services page. And if you’re curious how your soil health is contributing to weed pressure in the first place, read our post on how poor soil structure leads to weeds and thin grass — it’s often the root cause.