Organic solution for poison ivy/oak
I have a couple questions...first, yesterday, my neighbor pointed out to me where some poison ivy and poison oak are trying to climb their way up our shared chain link fence. Very nearby, I have some ornamental grasses and a hydrangea, so I want to keep the soil good for them. How can I zap the poison ivy/oak organically without harming the nearby plants that I want to keep? I've heard vinegar kills weed, but would it really work for poison ivy/oak?
Also, does anyone have any good way to keep the weeds down in between pavers, driveway cracks, etc? Do you just keep spraying them with vinegar again and again?