For nutsedge control it is best treated using something like Sedgehammer Herbicide which is specifically designed for it and is also for some other broadleaf weeds. For signal grass is it best treated with a pre-emergent like Prodiamine 65 WDG but complete control is not always possible with this weed as it is a very difficult weed to control. You could also spot treat with a glyphosate based product like GlyPhoSel Pro and then reseed/so the area. The University of Florida has some information here about.
We would not recommend tank mixing SedgeHammer Herbicide with something like Trimec as the Sedgehammer requires a surfactant to use and Trimec does not. Using one with Trimec could cause injury to your lawn since it already contains one and does not need any additional.
We recommend that you apply quinclorac separately from the small Sedgehammer packets since the Sedgehammer packet already contains a surfactant. Since quinclorac products generally require a more aggressive methylated seed oil surfactant, mixing these would cause extra stress on your desirable grass and may be too harsh.
The SedgeHammer Herbicide packs contain a surfactant to increase the effectiveness of the product. It is not necessary to apply it with another product for faster results. Please refer to the product label for complete mixing and application instructions.
SedgeHammer Herbicide is a great product labeled to treat Purple Nutsedge, Yellow Nutsedge, Kyllinga in most warm and cool season turfgrasses. Please see product label for complete list of tolerent turfgrasses.
SedgeHammer Herbicide should not be used on pastures or grazing areas, and you should not treat around hay that will be used for animal feed. The SedgeHammer should not affect Timothy grass that may be contacted by the herbicide, although the product label does not specify information about this plant, so we would recommend spot treating a small area first before applying over a large area with this plant. The 1.33 oz bottle of SedgeHammer will yield about 40 gallons of finished solution. You should add 2 teaspoons of a non-ionic surfactant per gallon of water when diluting SedgeHammer from the larger bottle. The smaller packets already have a surfactant mixed in with the product.
SedgeHammer Herbicide can be applied to fine and tall fescue, creeping bentgrass, kentucky bluegrass and perennial ryegrass.
Triad Select Herbicide can be tank mixed with Sedgehammer to treat broadleaf weeds but would not take the place of a Non Ionic Surfactant.
SedgeHammer Herbicide is only labeled for turf and ornamental applications. It cannot be used in a pasture.Unfortunately, we apologize but do not have a product that would kill the sedge and also be safe for pasture areas. We would recommend contacting your local agricultural department for a recommendation.
SedgeHammer Herbicide is safe for application to established Zoysia.
SedgeHammer Herbicide will kill yellow and purple nutsedge but not globe sedge. To control all 3 you would need to use something like the Dismiss Turf.
Sedgehammer as well as any other product on the market needs to be used within 24-48 hours of mixing it up in your tank. Try to only mix up what you need at a time or see if there are other areas you can treat with the product for weed control to use all of what was mixed.
SedgeHammer Herbicide should not be used on pastures or grazing areas, and you should not treat around hay that will be used for animal feed.
Because sedges are so hard to control there aren't many pre emergents on the market that will work on nutgrass/sedge at all. Freehand is one that works well and can be used in a variety of bedding and turf areas.
You can either spot treat with roundup or sedge control product like Sedgehammer for post emergent control over the nutgrass.
After treating with SedgeHammer+ Herbicide it will take time to completely kill the treated sedge but because the dead sedge will eventually decompose, there is no need to pull out the dead weeds.
