Steam weeding or weed control (also known as thermal weed control) by the Optima Steamer uses only water (and very little of it) and exposes weeds to high-temperature low pressure steam. The intense heat causes irreversible harm.

This process involves directing a flow of hot steam from the Optima Steamer onto the leaves and stems of unwanted plants, using weeding specific accessories to channel the hot temperature in a concentrated area.

Steam effectively destroys weeds by dissolving the protective waxy layer covering the plant’s surface, leading to dehydration and eventual demise. A single steam treatment can typically eradicate most annuals and young perennials. However, older perennials may necessitate multiple treatments for complete elimination. Although steam doesn’t directly impact the underground parts of the weed, repeated applications target the aboveground sections, impeding photosynthesis and depleting the plant’s carbohydrate stores over time.