As others have said, RoundUp / glyphosate doesn’t always handle these tougher plants. I’ve had good results with Crossbow: https://www.winfieldunited.com/produc

As others have said, RoundUp / glyphosate doesn’t always handle these tougher plants. I’ve had good results with Crossbow: https://www.winfieldunited.com/products/herbicides/crossbow/242 https://www.winfieldunited.com/products/herbicides/crossbow/... Not sure if that is readily available in all regions, though.