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Fred from Amelia Court House, Virginia writes

Will SpeedZone Lawn Weed Killer Concentrate kill bittercress? How long is the mixed solution good for? A day or two?


SpeedZone Lawn Weed Killer Concentrate is not labeled to kill or control bittercress. You also do not want to keep it for more than 24 hours once it has been mixed. This is because the mixture will no longer be in suspension and would have lost its potency and efficacy. 

Answer last updated on: 03/13/2021

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