Best Way to Get Rid of Foxtails

Spot foxtail early-it starts like regular grass but has wide, rough, bright green leaves with fine hairs at the base and purplish young seed heads. Kill it safely with Ortho® Weed B Gon® Plus Crabgrass Control or spot-treat young plants using Roundup® For Lawns Ready-To-Use. Mow before seeds form, apply pre-emergent with Prodiamine at 55°F soil temps, then reseed with tall fescue or perennial ryegrass and mow high-3 inches for fescue, 2 for ryegrass to block sunlight. A healthy, dense lawn stops foxtail’s return, and choosing the right grass makes all the difference.

We are supported by our audience. When you purchase through links on our site, we may earn an affiliate commission, at no extra cost for you. Learn more. Last update on 19th July 2026 / Images from Amazon Product Advertising API.

Notable Insights

• Identify foxtail early by its bright green, wide leaves and fine hairs at the base before it spreads.
• Use selective post-emergent herbicides like Ortho® Weed B Gon® to kill foxtail without harming your lawn.
• Apply pre-emergent herbicides before soil reaches 55°F to prevent foxtail seeds from germinating.
• Reseed bare areas with competitive grasses like tall fescue or perennial ryegrass to block foxtail establishment.
• Mow high (2–3 inches) regularly to shade out foxtail seedlings and prevent seed head formation.

Identify Foxtail Early: Before Seeds Spread

You’ve probably seen foxtail without realizing it-this weed starts off looking like ordinary grass, but it won’t take long before it turns into a serious problem if you don’t catch it early. As an annual grassy weed, foxtail thrives in warm, sunny growing conditions and spreads fast if you don’t identify foxtail early. Its leaves are flat, wide, and rough, often brighter green than your turf, with fine hairs at the base. Young seed heads start green or purplish, then turn tawny and bristly-loaded with foxtail seeds built to latch onto fur and skin. Once seed heads form, those sharp seeds can injure pets or contaminate yards. That’s why smart lawn care means scouting in late spring and early summer. Spot it fast, so you can kill foxtail before it sets seed. Early action stops seeds from spreading, surviving digestion, and returning next year.

Kill Foxtail Weeds Without Harming Your Lawn

When it comes to getting rid of foxtail without damaging your lawn, timing and the right products make all the difference. You can kill foxtail weeds without harming your lawn by using selective herbicides that target grassy weeds while sparing desirable turf. Apply a post-emergent herbicide like Ortho® Weed B Gon® Plus Crabgrass Control, which kills foxtail and over 200 weeds without damaging established grass when used as directed. For small patches, spot-treat with Roundup® For Lawns Ready-To-Use on young, actively growing plants to avoid lawn injury. Always mow regularly before seed heads form to reduce spread and improve treatment success. Keep your lawn dense and healthy with proper mowing, watering, and fertilization-this naturally crowds out foxtail. While pre-emergent herbicides help stop regrowth, they won’t kill existing weeds.

Apply Pre-Emergent Herbicide to Stop Regrowth

If you’re serious about keeping foxtail out of your lawn for good, applying a pre-emergent herbicide is a must, and timing it right makes all the difference. You’ve got to apply the treatment before soil temperatures hit 55°F, the point when foxtail seed germination kicks off. Most pre-emergent herbicides labeled for crabgrass control also stop foxtail, as long as they’re applied early. Products with Prodiamine or Dithiopyr form a chemical barrier in the soil that blocks seedlings before they emerge. Once foxtail sprouts, the herbicide won’t work, so early action is key. For steady protection, reapply every 6–8 weeks through the growing season, following label rates. Consistent timing and proper coverage give you a stronger defense and cleaner lawn. You’ll see fewer weeds and less mowing in the long run.

Reseed With Grass That Outcompetes Foxtail

While pulling weeds and using herbicides can help in the short term, the real long-term fix for foxtail lies in building a lawn that fights back-starting with reseeding using aggressive grasses that naturally crowd out invaders. You should reseed with grass that outcompetes foxtail, like tall fescue, perennial ryegrass, or orchardgrass, all known for dense growth and resilience. Choose endophyte-enhanced tall fescue for added pest resistance and durability under stress. Pair it with clover to boost ground cover and fix nitrogen, improving soil naturally. Make sure your soil is ready-adjust pH and nutrients based on a certified soil test for best establishment. When planting, keep mowing heights at 3 inches for fescue and orchardgrass, 2 inches for ryegrass. This encourages thick growth that shades out foxtail and keeps your lawn strong season after season.

Mow High and Rotate to Keep Foxtail Gone

Since you’re aiming to keep foxtail from taking over your lawn or pasture, mowing high and rotating grazing areas is one of the most effective, science-backed strategies you can use. To shade out foxtail weeds, you should mow high-maintaining at least 3 inches for fescue or orchardgrass and 2 inches for ryegrass. This boosts dense growth of desirable grasses and blocks sunlight from foxtail seedlings. Use preventive mowing before seed heads form, and always maintain proper stubble height to support grass vigor. Rotate grazing routines to avoid overgrazing, giving forages time to rebound. Consistent rotation and rest periods limit foxtail establishment and strengthen pasture resilience.

On a final note

You’ve got this: catch foxtail early, use a selective post-emergent like Drive XLR8 to kill it without harming turf, then apply prodiamine pre-emergent in spring and fall. Reseed with dense, competitive fescue or Bermuda grass at 3–4 lbs per 1,000 sq ft. Keep mowing high-at 3 inches-and rotate mowing patterns weekly. This combo blocks regrowth, strengthens lawn health, and keeps your pets safe from clinging seeds.