We have gained much experience in the growing season of 2012 – 2013 on how to grow crops at a height of 20 meters, right in the center of Rotterdam. The growing conditions are similar to a Mediterranean climate: very dry and windy. Therefore, we grow many herbs (mint, lemon verbena, lavender), tubers (Jerusalem artichoke, beetroot, carrot, radish), allium vegetables (onion, leek, garlic) and strong plants like zucchini, rhubarb and pumpkin. In 2014 we started with various types of edible flowers. This was a very successful crop and popular with our customers the restaurant-chefs.