Fifth Season Takes Vertical Farming to a Whole New Level

Image from: Pittsburgh Post-Gazzette

Fifth Season’s verdant baby spinach screams farm fresh even though it’s grown nowhere near traditional farmland. The sweet and slightly crunchy greens are grown in a Braddock warehouse on racks stacked 30 feet high. Located just a stone’s throw from U.S. Steel’s Mon Valley Works Edgar Thomson Plant, it is urban farming at its core.

What makes the vertical farming operation especially unique is that it is automated and robots call the shots. About 40 to 60 machines are involved in every step of the life of the spinach and other leafy greens, from planting the seed to providing nutrients to the final packing.

Fifth Season does employ local “farm workers” to assist the robots in seeding, harvesting, packaging, quality assurance and control using computer software, but there is no human touch involved through it all.

“The first time someone ever touches the spinach leaf with a finger is when the package is opened,” says Grant Vandenbussche, chief category officer.

Co-founded by brothers Austin and Brac Webb and Austin Lawrence, Fifth Season started a year ago. Within months it was rolling out its baby spinach, leafy greens and salad kits.

“We wanted a name that represents what we are doing,” says Austin Webb, 32, who also is the CEO. “It is a call to the fact we have created an entirely new season. It is 24/7, 365 with the technology we have built.”

None of them planned to become modern farmers, says the Carnegie Mellon University grad, but they turned to vertical farming because it was an efficient, economically sustainable way to solve land and water woes.

Image from: thespoon.tech

‘Fields’ of Greens

Fifth Season grows an equivalent production of 200 acres in 25,000 square feet of grow space. Its “fields” are stacked on top of one another in vertical shelves. When you add up all that surface area of grow space, it is more like 126,000 square feet.

“We also quickly turn crops at the farm,” Mr. Vandenbussche says.

While spinach takes about 40 days to grow outdoors and can be harvested only twice during its peak season, it takes the crop only three or four weeks to grow in the controlled environment and is harvested 19 times. Once the plants are harvested, a new cycle of reseeding begins with fresh media, seeds and nutrients.

“That’s why we get so much more productivity,” he says. “We are immediately reseeding our ‘land.’”

This controlled environment yields quality produce because it is always peak season at Fifth Season, says Chris Cerveny, who heads the Grow R&D division. Greens are grown in the same conditions year-round, getting the exact amount of nutrients and water they need. Because pests and airborne toxins also are kept at bay, crops can be produced without pesticides.

All that TLC comes through in the slightly curled baby spinach, which is sweet and not grassy. The leaf doesn’t wilt or get slimy or lose its slight crunch even after two weeks of refrigeration.

A lot of thought was given even for the curl, which gives the spinach a stronger volume, making it look full and bountiful. The curl also makes the spinach more forkable unlike its flat-leaf counterpart that is hard to stab on a plate.

Other leafy greens such as kale, mustard, Chinese cabbage, green tatsoi and purple pac choi are featured in two blends — Bridge City and Three Rivers. Fifth Season plans to roll out its Romaine lettuce in spring.

The greens also are found in four types of salad kits — Sweet Grains (blended greens, quinoa, chickpeas, corn, feta and poppy seed dressing), Crunchy Sesame (blended greens, farro, sesame sticks, dried cranberries and ginger-mandarin dressing), Toasted Tuscan (spinach, lentils, sun-dried tomatoes, bagel chips and vinaigrette), and Spiced Southwest (blended greens, black beans, pepitas, cotija cheese, corn-salsa sticks and chipotle ranch dressing) — which are available online and in Giant Eagle stores. A fifth salad kit is in the works and is being called “a shakeup of one of the most classic salads.”

While machines are a big part of what Fifth Season does, it seeks to keep human connection alive. It recently launched a recipe blog for those who have an appetite for cooking and writing, The Green Room is devoted to cataloging personal memories, dream meals and recipes via short stories.

Fifth Season also has partnered with the Penguins and is providing greens for the team’s pregame meals for the 2020-21 season.

“We want people in Pittsburgh to be able to eat the exact same delicious blend of greens that Sidney Crosby and company are eating,” Mr. Webb says. “We want people to know that there’s a new way to grow food and to eat and experience it.”

Image from: Next Pittsburgh

It’s All Under Control

Everything from seeding to packaging is done in four rooms. The process starts in the seeding and processing room, where seeds and growing media are placed inside black planter-like boxes called inserts. Each has a unique code that’s traced by a software system. The inserts go on white trays that pass through a photo station, feeding information to the computer system, and then glide into the bio dome.

There are two rooms in the bio dome, each with a grow space of 12,500 square feet. They’re lit up with a pinkish-purplish glow from high-efficiency LED light bulbs that mimic the different seasons of the year.

“They are positioned over the plants at different heights depending on stage of growth,” Mr. Cerveny says. “This is partly how we can provide consistently ideal growing conditions.”

As the plants grow, they are moved by a robot to optimize their growth cycle. Full-grown crops are transferred to the harvesting room by another robot.

“Harvesting is where it becomes like a Willy Wonka factory,” Mr. Vandenbussche says.

Long rows of trays filled with tiny plants are sent on a conveyor system to a station where workers inspect them for quality with surgical tools. After inspection, the plants are harvested by a robot and then immediately ride up a tall conveyor to be packaged and sealed in a 34- to 36-degree room so they remain fresh.

“Every crop we grow gets evaluated for maximum flavor, volume, crunch and color,” he says.

The plants’ intense, dark color is controlled by LED light bulbs, which are dialed up or down to get the correct hue. Although they never see the sun, the greens don’t get into a funk as humans might.

“What humans see in terms of light and how chlorophyll responds during photosynthesis are two different things,” Mr. Cerveny says. “Plants really only need red and blue light to grow effectively. We include some additional colors to help bring out other quality aspects of our crops, but providing the full sunlight spectrum is effectively a waste of energy, especially indoors.

“To the human eye, it looks like the plants live in a land of purple and pink lights, but they are perfectly happy there.”

Even though the environment is controlled and the software system is constantly updated, no two plants are exactly the same. Some fight for light more than others. Some might fail the quality control test and end up in a compost waste facility if their flavor is off or their color is not right.

“That is what is so amazing. We have more control than any other farmer, and yet we have limitations. Every seed is different,” Mr. Vandenbussche says. “They are plants. They are real living organisms.”

Power Generator With Battery Allows Growers To Go Off-Grid

Rolls-Royce offers with its MTU microgrids the company's first eco-friendly and on-site power generation solution suitable for agricultural applications. These autonomous power grids combine renewable energy sources with battery storage and gas and diesel generators using a microgrid control system developed by Rolls-Royce, thereby reducing CO2 emissions in power generation. Farmers also lose their dependency on the public grid and can integrate existing energy sources such as photovoltaics or biogas plants, which offers financial benefits. Rolls-Royce will be presenting its microgrid solutions for farming applications at the agricultural trade show Agritechnica from 10 to 16 November.

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“Many farmers already have large-scale photovoltaic or biogas plants and are therefore ideally equipped to use a microgrid. Our MTU EnergyPack, the battery container, and a smart energy management system allow the various energy sources to be optimally deployed – both technically and in terms of cost,” explains Cordelia Thielitz, Vice President Microgrids at Rolls-Royce.

The components of a Microgrid can be adapted according to the requirements. The possible applications in agriculture are manifold and offer advantages in terms of return-on-investment (ROI), decentralization and decarbonization. Here are three examples:

Prime power from biomass
Instead of continually pumping all the electrical power won from a biogas plant into the public grid, it can be stored in the MTU-EnergyPack. The smart energy management system then ensures that this energy is only fed into the public grid at times of peak demand when prices are at their highest.

Self-sufficient greenhouses
To flourish and grow, crops cultivated in greenhouses need temperature levels and light exposure to be kept as constant as possible. The heat and power required to achieve that constitute major cost factors for any farmer.

But with combined power generation using a photovoltaic installation and MTU generator linked up to a battery and master controller, the greenhouse can operate independently round-the-clock without recourse to the public grid. Electrical energy generated by photovoltaics and a gas-powered CHP module during the day can be fed into the batteries, where it is subsequently available for lighting the crops and other electrical consumers. Heat from the CHP module is used to heat the greenhouses while CO2 recovered from its exhaust emissions promotes plant growth.

Profitability in times of change
For farmers in Germany who generate power for the public grid using photovoltaics and biogas plants and are subsidized under the German Renewable Energies Act (EEG), the microgrid can be a very worthwhile investment. This is because subsidy rates are falling, with many subsidy schemes soon to reach the end of their twenty-year term. Furthermore, operators of larger-scale PV plants also have to pay an EEG levy on the power they consume themselves.

Integrating these systems with batteries and a smart controller creates new cost benefits for farmers, who reduce their CO2 output at the same time.

“Integrating existing renewable energy sources as a microgrid creates an independent, reliable supply of energy which is gentle on the environment and saves money. For a not inconsiderable number of farmers, microgrids can open up new earning potential,” said Armin Fürderer, head of customer solutions in the power generation section at Rolls-Royce.

For more information:
www.rolls-royce.com/bergen

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Publication date: Thu 7 Nov 2019