× 1 of 2 Expand Bella Davis/New Mexico in Depth Chiquito calculates the adjustments she needs to make to the nutrient solution in one of the systems. Credit: Bella Davis/New Mexico In Depth × 2 of 2 Expand Bella Davis/New Mexico in Depth Kale grows in a hydroponic system called deep water culture, where the roots are continuously submerged. While hydroponic systems need less water than soil farming, there’s a tradeoff: They typically use more electricity—to power lighting, climate control, and water pumps. × 2 of 3 Expand Bella Davis/New Mexico in Depth Chiquito displays the roots of lettuce growing in the Crownpoint greenhouse. × 3 of 3 Expand Bella Davis/New Mexico in Depth In this system, called nutrient film technique, lettuce grows in shallow channels.