The developments in greenhouse horticulture – from flat glass to high-tech greenhouse – can be seen in our horticultural greenhouse. Can you grow lettuce on water? What is rock wool? To improve the growth of tomatoes, cucumbers, peppers and flowers, the amount of nutrients, moisture and light are controlled and the pest control is adjusted. Production can be increased in this way and that is important for the global food supply. And what does the future hold? Urban horticulture? Who knows!