Best solution for killing weeds? last summer I used a weeding tool to pull everything from between the slabs and then put salt between, I've also tried store bought weed killer but
Drummonds - Weed Control - Grazon Pro - For the spot treatment of all species of docks, thistles, nettles, briars and brambles through a Knapsack Sprayer.
RoundUp Pro Concentrate Herbicide | RoundUp Pro Weed Killer | Solutions Pest & Lawn