Sky Urban Solutions' home-grown vertical farming device has bagged a prestigious international design award. The 9m-tall system with tiers of planting troughs which rotate around an aluminium frame, clinched the biennial INDEX: Award in Denmark on Thursday night.

The Singaporean innovation was among 1,123 nominations from 72 countries.

The water-pulley system uses rainwater collected in underground reservoirs to rotate the troughs so that the plants get a uniform amount of sunlight. The same rainwater is used to irrigate the crops.

The first system was developed in 2010 with the help of the Singaporean Agri-Food and Veterinary Authority (AVA).

Sky Urban Solutions has come a long way since then. Its farm in Lim Chu Kang now houses 1,000 vertical farming towers and produces 800kg of greens - including Chinese cabbage, nai bai and xiao bai cai - daily. Its vegetables, sold under the brand Sky Greens, are more expensive than other versions.

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