Depending on how established the nutsedge is, it can take multiple applications to kill the actual nutlets, even when using an effective product like SedgeHammer + Herbicide. Ideally, the nutsege that will emerge in the upcoming growing season will be easier to control, because of the treatments you have applied in the last 12 months. Sometimes, it can take multiple growing seasons to eradicate a well established series of weeds from an area, even using the most effective of product.
Please view our Nutsedge Treatmet Guide for more information.
SedgeHammer Herbicide should not be applied around groundcovers, ornamentals, vegetables, shrubs, trees, or flowers. It is to be applied to turf areas only.
For treating weeds under the canopy of desriable trees, bushes, shrubs, etc – it is recommended to spot treat weeds with a non selective herbicide like Roundup QuickPro as this will not leach into the soil or to nearby root systems. View the full product label for more information.
Sedgehammer + Herbicide is only labeled to control Purple Nutsedge, Yellow Nutsedge, and Kyllinga and would not control woodsorrel.
For woodsorrel in St. Augustine lawns, Hi-Yield Atrazine Weed Killer or Fertilome Weed Free Zone would be a better option.
Applying a pre emergent such as Pendulum 2G in early Spring and late Fall is recommended to prevent weeds from germinating. This will help cut back on the amount of post emergent applications during the actively growing season. View our Warm Season Lawn Care Schedule for more information.
The manufacturer of SedgeHammer + Herbicide states on the product label not apply this product around desirable flowers, ornamentals, vegetables, shrubs or trees. In order not to prevent damage to any desirable vegetation, including trees and shrubs, you should keep you application well outside the drip lines and root zones of trees, and avoid any drift from contacting ornamentals or edible vegetation.
SedgeHammer is not labeled to target clover. It should not be applied to desired clover plots only listed, established turfgrasses as directed.
SedgeHammer may not be the best option for you. It is meant more for nutsedge control in turf grass and it cannot be used in or around a vegetable garden or anything edible. It remains in the soil for up to 3 years so the manufacturer recommends that you not plant anything edible in an area where SedgeHammer has been applied for at least 3 years. For nutsedge control in or around a vegetable garden, it is recommended to spot-treat the sedge with a glyphosate or RoundUp-type product directly. With this type of product, it is only necessary to wait 2-3 weeks after application to plant vegetables or anything else. We would recommend Roundup QuickPro 1.5 oz. packs for ease of use.
Also, you should not just pull the plants. This will just split off the rhizome and more new plants will grow from the nutlets left in the soil. To completely remove the plants, you would need to completely dig out the nutlets so that new plants do not grow from them. Many folks will still till the soil after using RoundUp to be sure there are no remaining nutlets that will grow new plants.
Using SedgeHammer Plus Herbicide the nutsedge itself takes about 3-6 weeks to die in some cases, so realistically you could mulch pretty close after if you are mulching over where you applied the Sedgehammer and where the sedge is growing.
