Seaweed extract can be used to reduce the effect of stress on lettuce production in water limited environments.
Based on this research with cos lettuce in sandy loam soil, a similar fresh weight was achieved despite a 40% reduction in irrigation when Seasol was applied. There is a significant body of international research confirming the benefits on water use efficiency or drought tolerance using seaweed extracts.
Reduced irrigation rates can save fertiliser nutrients by limiting nutrient leaching through the soil profile. Water use efficiency may become important in Australia in 2024 and beyond as El Niño becomes more likely.
