Non-chemical weed control


Using hot water to combat weeds is nothing new. The first patent was taken out back in the 1880s, but the method could not be used on a large scale owing to the inadequacies of the technology.

Thermal weed control is based on transferring energy (heat) to the plant. Water is one of nature's best energy carriers and often easily available. This makes the hot water method the safes and best solution.


Steam and hot air do not work in the same way as hot water at all:

  1. Water is one of nature’s best energy transmitters and hot air is one of the worst.
  2. Gravity means that the water flows downwards and reaches the plant quickly, right down to the roots.
  3. Hot air and steam always rise , so some of the energy (heat) disappears before it gets to the plant.


The Heatweed Method fully exploits the properties of water: Combined with sensor technology and advanced temperature control, this results in a means of controlling weeds that requires very little energy. Thanks to efficient energy transfer, a maximum of four applications a year will suffice.

A study carried out at the University of Copenhagen shows that treatment with hot water produces the lowest weed cover – even with the lowest treatment frequency. See the below table:

Above: Hot water can transfer 23-27 times more energy than hot air or steam. Here you can see pictures from studies at Ghent University 7 days and 21 days after application.

The most common herbicide-free methods compared

There are advantages and disadvantages to most methods. The Heatweed Method is a just choice.