a step or two further than conventional greenhouses nothing is left to chance here the seeds a disinfected before being planted to exterminate any gems your fungus. because it sucks all the nutrients from plants and eventually. strictly controlled artificial lighting it's a complicated and expensive set up. the space light quantity and nutrients have to be calculated precisely. we decided to go for baby leaf lettuce instead of butter had let us because it grows faster and requires less energy. cress grows in just six or seven days depending on the bribee it's a question of finding the right balance economically and ecologically. ten canteens in restaurants in hamburg now order their lettuce from the indoor farm it costs between nine and twelve euro's per kilo