Revol Greens is the largest greenhouse lettuce grower in North America, growing organic and conventional lettuces in MN, CA, TX and GA. We use the most advanced greenhouse technology and growing methods in the industry, including facilities that use 90 percent less water than traditional field-grown greens, irrigation from UV-sterilized rainwater and snowmelt, and sustainable sunlight. Grown Clean and GreenĀ® in an animal and pest-free environment, no pesticides, herbicides, or other harmful chemicals are used in the process.