| It works by killing the existing leaves and roots, and creating a barrier in the soil preventing new weeds from growing for up to 3 months. Can be used on paths and patios.effective against a wide range of both emerged and germinating weeds.3 sachet carton treats 30 sq m (36 sq yd). it is effective against annual and perennial weeds. contains glyphosate, oxadiazon and diflufenican. always read the label as with any chemicals.. |  |
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