Killing Weeds Pour a stream of boiling water carefully on the crown of each unwanted plant. Tough perennial weeds with long tap roots may take two or three applications, but will eventually stop coming back.
Sprinkle salt in the spaces between patio slabs and at the bottom of walls to get rid of pesky weeds(but be careful NOT to get salt near plants you want to keep as salt will kill them!) 101 Household Tips for Every Room in your Home
5 Ways to Kill Weeds With Stuff You Have Around the House