Boiling water - or just HOT?
I have come across several suggestions to use boiling water to kill weeds, especially on patios, in pavement cracks, and so forth.
Just wondering: How hot does the water have to be? My water heater is set at 140F, and for a weed-killing project, I can probably turn it up higher.
It would just take a lot of trips to the stove to boil enough water to do my back patio (which is concrete pavers). But I can easily run a hose from the water heater to the back yard.
How hot does the water need to be to be effective?