Propane Weed Torch Weed flaming, or flame weeding, is a method of weed control that uses a handheld propane torch to ignite weeds. The heat from the flame kills the weeds by destroying their cells and preventing them from growing further. Weed flaming is a relatively new method of weed control, but it has become increasingly popular in recent years. It is a non-chemical method of weed control, which makes it appealing to environmentally conscious gardeners. It is also a relat