Vertical Farmer LettUsGrow Sets Sights on Commercial Greenhouse Market With New Harper Adams Partnership
Jessica Rawnsley
29 April 2021
EXCLUSIVE: New research project to explore how vertical farming approaches could be applied to the greenhouse sector to boost yields and curb environmental impacts.
Vertical farming technology is poised to branch out into the commercial greenhouse sector, after indoor farming specialist LettUsGrow announced a major new partnership with Harper Adams, the UK's leading specialist agri-food university.
The partnership will enable a long-running trial to span across most of 2021, which will explore the environmental impact and compare growth data from two irrigation systems, aeroponics and hydroponics, in different settings: an aeroponic vertical farm and greenhouse, and a hydroponic greenhouse.
"Our food supply chain needs to be diversified to achieve productivity and stability, which means maximising the benefits of new technologies in different horticultural environments," said Charlie Guy, co-founder and CEO of LettUsGrow. "The advanced greenhouse industry is a huge part of modern food production and is entering an exciting new phase of growth to help meet global production and sustainability targets. We want to help this industry to grow more, sustainably."
According to company figures, vertical farms use 95 per cent less fertiliser and 95 per cent less water than open field farming. LettUsGrow has evolved a system for utilising aeroponics where rather than soak plant roots in water and nutrients, they are suspended and sprayed with mist. The company claims the approach consumes 30 per cent less water than a conventional hydroponic system, while produce grows an average 70 per cent faster. While a wide range of crops can be grown with the tech, the initial focus will be on growing kale and pea shoots.
The company has also developed Ostara, a smart control and farm management software systems, that will be used within the greenhouse and vertical farm trials. Ostara can be used to tailor lighting, irrigation, nutrient doses, and environment to individual crops within the same farm, as well as being used to collect a wide range of data sets, the company said.
To date vertical farms have been hampered by the considerable ongoing costs of generating artificial light. As such a key feature of the trials will be to identify whether an increase in energy use is balanced by an increase in farm productivity.
However, LettUsGrow is optimistic the application of its advanced aeroponics and Ostara technologies can deliver benefits for commercial greenhouses as well as vertical farms.
"Bringing aeroponics into a greenhouse setting is really exciting, as traditionally they run on hydroponics," said Ricardo Lopes, research scientist at LettUsGrow and the project's research lead. "There has been little research into this before so we're starting from scratch. There is huge potential in the opportunity to combine the precision of high-tech greenhouses with optimised aeroponic irrigation - meaning we could offer the plant the exact amount of water it needs, when it needs it, alongside the unique environmental control of greenhouse technology. The prospect of using aeroponics to decrease water usage within greenhouses could be a very important step in making greenhouse production even more sustainable and less energy demanding."
His comments were echoed by Dr Laura Vickers, senior lecturer in plant biology at Harper Adams, who said: "This is a particularly exciting project, greenhouses provide the half-way house between field based production and total controlled environment agriculture. They are excellent systems to apply to urban spaces, such as building rooftops. Quantifying the performance of technologies developed by LettUsGrow in our campus greenhouses, opens up the ability to assess resource efficiency, and evaluate how crop production could work in a variety of landscapes that could bring an array of stakeholders that we just don't see at the moment."
The hope is the partnership could represent a further step forward for a vertical farming sector that advocates maintain could make a huge contribution to efforts to bolster food production as climate impacts escalate. "Indoor farms can be deployed in areas without any fertile land," India Langley, LettUsGrow communications lead, told BusinessGreen. "That could be deserts, cities. There's one currently in the South Pole. As well as providing food, it takes the pressure off land that's already so stretched."
Lead photo: Credit: LettUsGrow