Baking soda and weeds ... A safe way to keep weeds and grasses from growing in the cracks of your paved patios, driveways, and walkways: Sprinkle handfuls of baking soda onto the concrete and simply sweep it into the cracks. The added sodium will make it much less hospitable to dandelions and their friends. Try it 2x/yr, spring and fall. Site has other ways to kill weeds.
How to Kill Poison Ivy Combine 1 gallon white vinegar with 1 cup salt and 2 TBSP blue dawn dish soap. * Once all the ingredients have been mixed well pour mixture into a spray bottle. * Spray poison ivy. Be careful not to get it on your other plants because this mixture will kill anything you spray. Going to try this! It's everywhere:(