Field trials
Less water, more harvest: the measured results
Universities, research centres and farms have tested the EVERGREEN water retainer, on its own or with the ECOFERT fertiliser, on seven crops in six countries. Each page carries the figures from the report and links to the full document.
The principle is the same everywhere: the water retainer holds water near the roots and hands it back to the plant little by little. Depending on the crop and the climate, the trials measure up to 82% less water and up to 93% more harvest.
Completed trials
Date palm · United Arab Emirates
Date palms in the Emirates: 82% less irrigation water
2020-2021 season
Watermelon · Mexico
Watermelons in Mexico: 60.5% less water and 30% more harvest
15 February – 2 August 2023
Cotton · Turkey
Cotton in Turkey: yield almost doubled under water stress
2025 season
Maize · Turkey
Maize in Turkey: 39% less water and 17% more yield
May – September 2025
Sugarcane · Indonesia
Sugarcane in Java: 55% more harvest with EVERGREEN and ECOFERT
February – July 2024
Potato · South Africa
Potatoes in South Africa: 31% more yield, 52% less water
September 2025 – January 2026
Soybean · China
Soybean in China: 11% more yield with a super-absorbent
June – October 2017
Trials under way with universities
- Red maples in town — University of Florida. The Klein arboriculture lab (Gainesville) is testing EVERGREEN on 90 red maples planted in April 2025: 30 with the gel in the planting hole, 30 with the gel mixed into the soil around the tree, 30 without gel. A two-year study. PDF
- Douglas fir reforestation — Oregon State University. The VMRC research cooperative is testing EVERGREEN on two reforestation sites with contrasting water deficits, near Coquille and Roseburg: 48 seedlings with gel and 48 without, on each site. Planted in February 2025, a two-year study. PDF
Banner photo: Z3lvs — CC0, Wikimedia Commons