I am renting and our landlord has created a back and front patio with bricks and also a walkway to our driveway. There is no roofing over these areas and the weeds grow like wild flowers. I’ve tried pulling out every single weed, I’ve sprayed them with weed products etc. then as soon as it rains, there’s hundreds of them back again. I asked a landscaper and he said the only way is to lay new sand between the pavers. At a large cost that I can’t afford. The owner is of no help at all, it takes months for them to fix anything important. I’d like any ideas to try that might help.