At Little Leaf Farms we grow our greens hydroponically (or, without soil), and can irrigate our lettuce 95% more efficiently than field grown crops. We deliver water directly to the root system, wasting close to no water in the process.
Furthermore, we source our water from what falls on our roof! We collect 100% of the rain that falls on the greenhouse, sanitize it with UV lights, use that to water our leafy greens. That means we only draw on groundwater when there is a severe drought in New England. Any excess water that the lettuce does not use, is recycled through our water filtration system and put back in the greenhouse.