Jackson McLeod and Tyler Gaudet, both of Portland, examine leftover lettuce from last season in the greenhouse in North Yarmouth where they run their business Fluid Farms LLC in the summer months. White Nile tilapia and red and green butter crunch lettuce are both harvested in the greenhouse. The greenhouse is now shut down for the winter.

McLeod peels a venal strip while working in a metal roof gutter as he dismantles the roof of the 36,000 square foot greenhouse in Dresden. It took six months to dismantle.

Gaudet, left, and McLeod tend basil in the greenhouse in North Yarmouth. They operated in North Yarmouth over the summer and are in the process of re-erecting a larger greenhouse.

Tilapia used to create fertilizer for Fluid Farms LLC.

Gaudet shows how lettuce grows at the greenhouse in North Yarmouth. In deep water culture hydroponics roots are submerged in water constantly. The plants are fertilized by fish waste.

Gaudet shows how clean the root of the lettuce is in aquaponics.