St Augustine turfgrass - especially Floratam – the most widely used St Augustine turf grass for lawns in Pinellas County - is very sensitive to 2,4D compounds used in herbicides like Ortho Weed-B-Gon. Getting rid of Bermuda grass in St. Augustine lawns By Randy Lemmon Apr 27, 2017. Several different varieties of this common turfgrass exist, each with its own list of benefits. If you have chosen centipede grass for your lawn, there are a few steps that you can take to make your neighbors green with envy: mowing, fertilizing, and weed maintenance. Best of luck to you. Let the grass and the dallisgrass grow unchecked for a couple of weeks before the first application of herbicide and do not water the lawn afterward. Improve Grass: The presence of weeds is a sign that your grass isn’t healthy, and thick turf is by far your best defense. The best way to combat future wild onion and garlic problems is to make it hard for them to grow in the first place. Using 2,4D Herbicides to Control Dollar Weed in St Augustine. The Atrazine impregnated fertilizer can be used for St. Augustine in the springtime (we carry Nitro Phos St. Augustine Weed & Feed w/Atrazine 15-5-10). I did use a small trowel to finally dig it out. Dethatching is generally paired with a very low mowing height, but St. Augustine struggles if it’s cut under 2.5”. Tenacity … You should, therefore, establish your lawn in mid-summer when conditions are great for the growth and spread of this grass species all over your lawn. Also, use a surfactant to make it stick. Usually, 2 – 6 months, but keep in mind that environmental factors can always cause the herbicide to stop being effective. Almost impossible. Torocity contains mesotrione, the active ingredient found in Tenacity. Applying weed killer to your St. St. Augustine grass is usually dormant during the colder winter and fall seasons. In Houston, the vast majority of lawns are of the St. Augustine variety. A small site where one man shares his love for and knowledge of Saint Augustine grass lawns. St. Augustine Grass vs Bermuda Grass – Differences. Selecting the best weed killer for centipede grass will allow you to take your lawn to the next level. While no problems should arise if you're using Tenacity on turf that's on the label, excessive overlapping of this herbicide can cause temporary burn or loss of color in your yard. Post-emergent herbicides that control broadleaf weeds like dallisgrass are generally inappropriate for St. Augustine lawns. For the hardier weeds like Dallas Grass, Roundup weed killer is usually the only thing that can do the job, especially once the weeds get very mature. 1. Use the lowest label rate of Tenacity and half the label rate of Atrazine. Celsius WG is a post-emergent herbicide that comes in the form of water-dispersible granules and is great to use on St. Augustine grass, Bermudagrass and other labeled warm-season grasses to control perennial and broadleaf weeds. jagsend – posted 19 April 2003 13:08 I have a St Augustine grass lawn with quite a bit of Nutsedge. I did finally get one out but could not believe how the root system held in the ground. Is tenacity a pre emergent? Keep unwanted broadleaf weeds and grass species off your turf with Torocity from Atticus. Be sure to use a weed spray labelled SAFE for SAINT AUGUSTINE GRASS. There are some Bermuda-based lawns, and Zoysia is gaining in popularity. Is crabgrass preventer safe for St. Augustine grass? It reduces bleaching and increases toxic effect on the weeds. Hello. I bring this up because Quinclorac is NOT to be used on St Augustine or Centipede lawns; just want to make that clear. Move the can over and repeat. Results of using Tenacity herbicide on St Augustine for violets and nimblewill From Gary P.: Last year I spoke with you during your Saturday morning Lawn & Garden Show about using a systemic herbicide, brand name Tenacity , for a grassy weed, common name nimblewill. The weed is a vigorous grower and easily withstands very close mowing. Will tenacity kill grass? First and foremost, the chemicals used in this product are safe to use and will not have adverse effects on the lawn. I have St. Augustine Pammetto and mow it 4″ high. Previously, someone from BASF recommended Image. Sod farms cultivate new St. Augustine sod fields by planting small plantlets (plugs/sprigs) of St. Augustinegrass, which grow into a full field of sod in 8–12 months depending on the latitude of the sod … And, our soil is really good with the St. Augustine. I was attempting… 3. A broadleaf weed spray will control the majority of weed types in Saint Augustine grass. 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