jamesmartin
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why round up is inactivated with contact with soil, digging up means getting all the root not so easy, theres 2 types of weeds, thistle ,nettles and couch grass(twitch) benefit from systemic spray as it kills the root ,mechanical methods such as hoeing just increase regrowth other weeds can be controlled mechanically very successfully, i grow a lot of veggies so have to deal with lots of weedsPersonally I'd dig them out but I guess it depends on how much effort you want/can put in... round up would be a last resort for me especially if you plan on growing veggies etc.