Video Summary
Vertical Harvest's Westbrook facility produces about 3.5 million pounds of greens per year on roughly half an acre — ~500x land efficiency vs. conventional farms.
Controlled environment agriculture (CEA) with all-LED lighting avoids sunlight-driven microclimates and ensures consistent crop quality.
Facility focuses on high-value, fast-growing leafy greens, herbs and microgreens because they fit vertically and yield profitably.
Automated seeding, germination conveyors and RFID-tagged trays enable high throughput and traceability.
CO2 supplementation (~30 tons/month at full scale), HVAC, and water/nutrient treatment are critical operational inputs and costs for large indoor farms.
By stacking multiple growing levels (vertical racks), using hydroponics, running year-round cycles, and optimizing yield per square foot — Vertical Harvest reports ~3.5 million lbs/year from ~0.5 acre footprint.
Natural sunlight creates uneven heating and microclimates; LEDs let operators control spectrum and intensity to ensure uniform growth across thousands of trays.
Major constraints include energy usage (facility runs ~1.5 MW), CO2 supplementation (tens of tons monthly), specialized trays/RFID logistics, and strict sanitization and HVAC systems.
Leafy greens, herbs and microgreens dominate because they grow fast, are lightweight, high-value, and require little vertical space per plant — making the economics work.
Urban or climate-challenged areas with limited land, fragile supply chains, or strong local demand for fresh year-round produce; the model also supports local distribution and social programs.
"This is Vertical Harvest. Sitting on half an acre of land, it produces as much food as an equivalent 250-acre farm."
Vertical Harvest's innovative farming technique boasts a staggering 500 times the efficiency of traditional farming practices.
The facility, located just outside Portland, Maine, offers a practical example of how vertical farming can potentially revolutionize agricultural productivity.
During a tour of the facility, Matt Ferrell learns that vertical farming involves far more complex processes than merely arranging plants on shelves.
"We don't use any natural light to grow our plants. It's all LED light."
At the Westbrook facility, controlled environment agriculture (CEA) plays a crucial role in producing consistent yields.
Past experiences at their Jackson, Wyoming, farm highlighted that reliance on natural sunlight introduces temperature variances, which can affect plant growth.
By utilizing LED lights, Vertical Harvest can maintain a stable environment, crucial for the uniformity of crop quality.
"We're able to pump out a lot of volume to the tune of around 3.5 million pounds of produce."
The design of the Westbrook facility allows for substantial production, capable of yielding 3.5 million pounds of vegetables annually.
The focus is primarily on leafy greens such as lettuce, kale, and herbs, which are marketable crops that grow quickly and don't require as much vertical space.
Vertical Harvest prioritizes flexibility, opting for adaptable trays that can accommodate various types of greens instead of being limited to a single crop.
"What we have here is a radish blend of seeds that we pour into the hopper."
The seeding operation involves using a vacuum system to precisely place seeds into trays prepared for germination.
Each type of seed has specific requirements for spacing and depth, which are carefully managed to optimize growth.
After seeding, the trays receive a water spray before being transferred to the germination room, indicating the systematic approach taken in the vertical farming process.
"The trays have two options. They can go on the lower conveyor belt or the upper one."
The germination room is designed to handle a significant volume of trays efficiently, with the capacity to hold 6,000 trays at a time.
Once germinated, trays are moved to grow rooms where they receive specialized lighting—often appearing pink due to the type of LED used, which promotes plant growth.
The facility's layout maximizes space and ensures smooth logistics as trays progress from germination to the growing stage.
"This is huge. This is so cool!"
The video begins with a tour of the second floor grow room, showcasing the fascinating setup of vertical farming. The grow room currently operates on two of the available racks, highlighting the scale of the facility despite just a fraction being in use.
Viewers are introduced to the produce, which has been recently harvested, and observed young plants that were seeded just two days prior, already beginning to sprout.
"Plants care about which photons drive photosynthesis."
The facility uses pink LED lights because plants mainly thrive on red and blue light for photosynthesis, while reflecting the green light. This reflects an understanding that energy should not be wasted on wavelengths that plants do not utilize.
The design relies heavily on red LEDs for cost-effective growth, as the bulk of lighting expenses stem from energy consumption. The right mix of red and blue light aids plant growth and nutritional value without straining operational costs, thus ensuring economic viability.
"If one tray gets more light than the tray next to it, you get uneven growth."
A significant aspect of the facility's design is the tailored irrigation system where each tray has its own light fixture to ensure equal growth conditions.
Airflow management is crucial for plant health; the system maintains uniform air circulation, preventing uneven growth patterns by delivering air through a network of carefully designed channels. This setup resembles a well-conceived air hockey table that ensures even delivery of airflow.
"If I were to fill this building with plants and not supplement it with CO2, the plants would stop growing."
In a sealed environment like this facility, CO2 levels deplete rapidly due to plant consumption. Unlike outdoor conditions, it is essential to supplement CO2 to sustain plant growth, with requirements reaching about 30 tons of CO2 per month.
The implication of maintaining adequate air quality highlights a crucial aspect of indoor farming, where managing the atmospheric composition becomes fundamental for success.
"The current holdup is just waiting on trays."
The facility requires a significant number of custom trays embedded with RFID tags for tracking purposes, which are expected to arrive shortly to maximize throughput and efficiency.
As a strategy to optimize operations, the team is focusing on testing the systems with available resources, ensuring that everything runs smoothly when additional trays become available.
"When we walked into the stairwell, everything looked green."
During the tour, the operators showcase the lighting system by briefly increasing the light intensity to its maximum capacity, creating a striking visual effect that leaves a distinctive impression on the viewer's eyesight.
The experience is described as temporarily blinding, and upon returning to the harvest area, the coolness of the environment is noted, indicating that optimal chilling begins immediately after harvesting to maintain freshness.
"The greens go from this building straight to a store shelf within the surrounding community."
The harvested produce is transported via an elevator, moving through a systematic journey that includes cutting and packaging. The design ensures that the greens remain fresh for a longer duration, reinforcing the advantages of local delivery.
Once harvested, the greens undergo a meticulous processing cycle, from cutting blades to sorting by workers, and finally filling individual containers for sealing, ensuring effective handling throughout the supply chain.
"Everything in this building has to be not just clean, but sanitized."
Vertical farming operates like a closed loop system, necessitating strict cleanliness protocols to maintain balance within. Any introduction of contaminants can pose a significant threat to the crops and potentially harm consumers.
Before entering the grow rooms, visitors are required to don protective gear and pass through a hand washing machine that sanitizes and dries their hands automatically, emphasizing the importance of hygiene.
"The water gets filtered through a 50 micron screen, hit with UV to kill anything growing inside, and then the nutrients and pH get dialed in."
The facility includes a nutrient dosing area where water is treated and nutrient concentrations are adjusted accordingly. This ensures optimal growing conditions for the plants.
A sophisticated water treatment system incorporates UV reactors to sanitize the water; if contamination is detected, the system flushes itself to maintain clean supply levels.
The HVAC system is crucial for regulating the indoor climate, recycling heat generated by LED lights, and adapting light intensity based on outside temperatures to conserve energy.
"This is an example of the swabs we use. We will swab a surface and... it will test and say if it's clean or not."
Microbiological testing is conducted to ensure surfaces are free from contaminants. Swabs are used to sample various areas, which are then tested for cleanliness.
This testing is integral to maintaining a bug-free environment, which is essential in a vertical farming context where diseases can spread rapidly.
"We turn off the lights during those peak demand charge times to save on our energy costs."
The facility operates at 1.5 megawatts, with a substantial portion of energy consumed by the LED lights. To manage energy costs, the facility proactively responds to peak demand periods by cycling down the lights.
This strategy not only results in savings but also alleviates stress on the local power grid, demonstrating an innovative approach to energy management.
"Vertical Harvest isn’t trying to replace traditional farming; they’re filling a gap."
Vertical farming proves most beneficial in urban settings with limited space, unpredictable climates, and fragile supply chains, producing fresh greens year-round.
Additionally, Vertical Harvest employs a significant number of individuals with disabilities, integrating social responsibility into their operational model and emphasizing inclusivity.
