Water and Nutrient Recirculation and Reuse in Greenhouses (CIRRIWATER)
Project objective
Funded by the Interreg programme, CIRRIWATER aims to develop practical, low-cost solutions for reusing irrigation water in greenhouses. The solutions are designed to be adaptable, cost-effective and accessible to a wide range of growers. Four organisations from three countries are working together to ensure that the solutions can be used in Finland, Estonia, Latvia and beyond, and adapted to different types of greenhouses.
Project activities
- Survey greenhouse owners about their use of water recirculation systems.
- Assess current plant health conditions and nutrient availability in greenhouses in the partner countries.
- Develop solutions to improve the quality of recirculated irrigation water.
- Install and test a pilot solution in one greenhouse in each partner country.
Expected results and benefits
The project aims to develop systems for reusing water and nutrients. The results will help growers, small and medium-sized enterprises (SMEs), policymakers and business support organisations adopt smart, resource-efficient and scalable solutions for growing crops under cover.
Project partners
- Satakunta University of Applied Sciences, Finland (lead partner)
- Prizztech, Finland
- Estonian University of Life Sciences, Estonia
Access to project results
The project results will be published by April 2029 and made available free of charge to all businesses operating in the sector. Institute of Horticulture project page


