Steam works wonders when it comes to killing weeds. Weeds can't tolerate the temperature of the ultra-moist air, or steam, as it coats the exposed areas of each plant. ... Using steam to kill weeds heats the offending plants long enough to kill or at least greatly harm them as the heat transfers downward toward the roots.

How long does it take for steam to kill weeds?

According to the instruction manual, a shot of steam lasting 5 to 10 seconds is sufficient to treat each weed.

Will steam kill bindweed?

After a seedbed is planted, yet prior to crop emergence, repeated flaming can be useful to suppress Field Bindweed. The use of thermal (steam) weed control systems can be used as an alternative method from mechanical cultivation.