In a 20,000-square-foot industrial warehouse in Hong Kong’s Tai Po district, Farm66 grows vegetation on stacked cabinets below LED lights. Shielded from pests and air pollution, this indoor farm makes use of no soil and minimal water says Gordon Tam, co-founder and CEO of Farm66. What’s extra, the managed setting permits the corporate to direct the form and dimension of the vegetation.

Making efficient use of restricted house, indoor farms in city areas may assist to cut back transport-related carbon emissions and enhance meals safety in cities that depend on imports, says Tam — a problem that was thrust into the highlight when grocery store cabinets emptied throughout the pandemic.

Now, Tam is trying to scale up manufacturing of his good farming expertise, in addition to exploring methods to develop crops in excessive environments — together with outer house.

A homegrown startup

Based in 2013, Farm66 was an early pioneer in vertical farming.

In its patented aquaponics system, fish tanks are positioned under cabinets stuffed with leafy inexperienced herbs and greens. The vegetation filter water for the carp that reside within the tanks, and the fish are fed leftovers — imperfect greens that may’t be bought. Fish waste gives pure fertilizer for the vegetation, differentiating Farm 66’s system from hydroponic techniques, which usually use chemical fertilizers, says Tam.

Good sensors monitor environmental circumstances, together with temperature and humidity, and the LEDs that illuminate the cabinets use completely different mild wavelengths to regulate plant development.

“A blue mild can improve the scale of the leaf,” says Tam. “The crimson (mild) makes the leaf smaller, however the stem shall be taller.”

For some vegetation, like lettuce, a big leaf is fascinating, whereas for tomatoes or strawberries, smaller leaves assist direct extra vitality and vitamins into the fruit, says Tam. The corporate has experimented with completely different rising circumstances to supply quite a lot of plant sizes — together with a batch of basil with leaves so massive they might cowl an individual’s face.

A rising alternative

Hong Kong’s agriculture sector wasn’t at all times so small, says Lam Hon-ming, a professor of life sciences at The Chinese language College of Hong Kong.

Within the Sixties, over 25% of Hong Kong’s land was farmed for rice, fruit and greens, and till the Nineteen Seventies, the territory produced round 50% of its personal meals, says Lam. However as the town grew, city improvement displaced farmland, and low, seasonal earnings from farming additional disincentivized native meals manufacturing, he provides.

Indoor, vertical farms may remedy these issues. By controlling the setting, farmers may develop vegetation extra shortly and improve the variety of harvests, says Lam.

Farm66's indoor vertical farm uses an aquaponics system, where fish waste is used to fertilize the plants, and the plants filter the water for the fish tanks at the base of the tower.
He factors to similar-sized cities with restricted house reminiscent of Singapore — which produced 14% of its recent greens in 2019 — to show what Hong Kong may do if it embraced vertical farming techniques. Different startups within the metropolis are additionally pursuing space-saving farming options: Develop Inexperienced, based in 2016, has developed good hydroponic planting techniques for dwelling gardeners, and Farmacy, based in 2018, provides refrigerator-like “cellular farms” to native outlets and eating places.
And whereas Hong Kong is brief on house, it has a rising variety of vacant industrial warehouses, with a couple of million sq. meters unused in 2020, in response to authorities experiences. These warehouses could be “perfect” for vertical farms, says Lam.

From metropolis limits to outer house

Farm66 is presently working at lower than 30% of its capability, producing round two tons of greens a month, which it provides to a handful of supermarkets and resorts, says Tam.

Farm66 is now specializing in analysis and improvement, reminiscent of robots to assist automate duties like harvesting. Credit score: CNN / Dan Hodge

The excessive setup prices for indoor, vertical farms remains to be a barrier, he says, which makes turning a revenue tough. Tam declined to share the corporate’s income however stated that lower than a 3rd comes from vegetable gross sales. As a substitute, the corporate is shifting its focus to analysis and innovation, and is creating methods to make indoor farming extra reasonably priced.

The corporate has developed prototype robots to assist automate duties like harvesting and planting, which Tam says will enter mass manufacturing later this 12 months. By establishing partnerships with factories in Mainland China to fabricate the robots at scale, Tam believes he can minimize prices for future city farmers.

Different Farm66 improvements embrace mini farms for houses, faculties and companies, which have sensors to observe and automate plant care.

Tam designed a conceptual "space farm" for an exhibition at the Hong Kong Design Center in 2022. He says the rotating hydroponics system could be a solution in zero gravity environments.
However Tam’s boldest imaginative and prescient is a literal moonshot. He has designed the Future Inexperienced Tunnel, a conceptual rotating hydroponics system for zero-gravity environments, and is adapting indoor farming expertise to develop vegetation in house.

Whether or not on Earth or in house, Tam hopes that indoor farming will flourish — and produce “prime quality, protected greens for our subsequent technology.”