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How long till I can apply wintergrass killer after using granular weed n feed

I have recently applied granular weed n feed to my lawn (2 weeks ago), which has been successful in reducing the clover. However I need to kill wintergrass now. I have used the wintergrass killer 6 weeks ago, can I reuse it again now?

Lawns • Weeds

As the active constituent Propyzamide is pre-emergent and root-absorbed, it kills newly emerging seeds as they throw out their first root. It needs water in the soil to be taken up and can last for up to 6 months in soil . On older plants, it damages them so in the first instance of hot days, it cannot draw up water. 



Answered: 6 Sep, 2021

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