Water and Nutrients
The water system is completely closed with 100% recirculation and disinfection using ozone, all separated by compartment so that the water balance can be set up per cultivation. The greenhouse does not discharge drain and condensation water into the sewer.
So no nutrients are lost, the water is used optimally and no residues of crop protection products end up in the sewer. The cultivation system in the Freesia is also closed on the water side by digging out bins in the ground and lining them with steamable foil, making them waterproof. Sand is used here as a substrate.