Philips GreenPower LEDs help Prime Delica to grow healthier and safer crops for 7-Eleven customers in Japan

Prime Delica uses different light recipes at different growth stages for each of the crops, with a pre-harvest treatment to increase the vitamin C level to meet functional food requirements. Apart from the premium quality, crops coming from their vertical farm also have a much lower bacterial count and are grown using no pesticides, a big advantage for 7-Eleven. 

“We do not use any pesticides because our crops grow in a closed environment, which also means there is no air contamination,” explained Mr. Saito. “Our crops can be delivered to 7-Eleven stores within 48 hours from harvest and are very fresh and full of vitamins. The cost price per crop is higher than in the open field. However, the overall costs of processing are vastly reduced in terms of logistics, checking and washing with very little waste. It’s a cost reduction mechanism if we consider the factory in total.”

Prime Delica has automated the entire process from seeding to harvest, minimizing manual operation time and improving the hygiene of the crops. Robots carry out logistical operations. A total lettuce growth cycle (frillice, red leaf and bimittuce varieties) from seeding to harvesting now only takes about 39 days, compared to 70 days in the open field. Production can even reach up to 3,200 kg of lettuce a day.

The new Sagamihara facility started operating in January 2019, and the company is looking to expand further in 2019 and 2020. Prime Delica is considering to grow other crops like strawberries in similar vertical farm facilities in the future.