ReGrow4C

Reusable growing substrates for circular horticulture

The extraction of peat, for example for ornamental plant cultivation, is under discussion because peatlands are considered a unique habitat for protected plant and animal species. Moreover, the extraction of peat involves significant CO2 emissions. Every cubic metre of peat that we can reuse represents a reduction in CO2 emissions, and thus reduces the impact on the climate and the environment.

That is why the ornamental plant cultivation company JoLuPlant NV in Staden has been investing for two years in upgrading and reusing cultivation substrates based on peat from strawberry and cucumber growers in the area. We believe that we can process cultivation substrates into reusable, high-quality potting soil, which we can reuse as a raw material for another crop, for example chrysanthemums.

Through this project, together with the Proefcentrum voor Sierteelt (PCS) and the Instituut voor Landbouw- en Visserijonderzoek (ILVO), we want to take a close look at the storage and processing in our recycling process and, where necessary, adjust, optimise and make it more sustainable. For instance, we want to investigate and test the efficiency of our steam treatment for fungi, insects and weed seeds. We will assess the quality of the recycled substrate and examine whether fertilisation needs to be adjusted. We also tested the steamed substrate for some typical ornamental plants in the cutting and propagation phases. Finally, we have also tested our process against the legal framework.