what growers say
about proJoules
Growers share how ProJoules supports greenhouse crop planning and improves their harvest forecast. From daily decisions to long term strategies, these are real experiences with the platform.
“In 2024, the long-term forecast in our cultivation plan with ProJoules matched well with what we actually achieved in practice. That accuracy helps us meet the expectations of our customers and reduces surprises during the season. It also gives us better insights into the crop, which we use to fine-tune our decisions. For us, ProJoules makes planning more reliable and easier to manage."
Dave van Drunen, Tomato Grower at Kwekerij de Bron
“ProJoules helps growers turn experience into clear decisions. Instead of going by feel, we now use real data to back up every choice. At one of the greenhouses I work with, we clearly saw the impact of too much leaf mass on production. With insights from the platform, we made changes and hit record yields. For me and the growers, it’s a tool that strengthens both advice and results.”
Willem van Dijk, Cultivation Advisor
“With ProJoules, we now talk about clear graphs and not just feelings. The platform helps us see the impact of our choices right away, based on real data. That gives us more confidence and helps us avoid mistakes before they affect the crop. For us, it has become an essential part of planning both lit and unlit tomato crops.”
Heiko Hagdorn, Tomato Grower at Hagdorn Tomatoes, Germany
“Before ProJoules, we didn’t know when to apply coating or how much light was too much. Now we can see those stress points clearly and adjust in time. That led to higher summer production and almost no blossom end rot. The dashboard gives us a complete overview, and I no longer have to build graphs by hand. For me, the time I put in each week is more than worth it.”
Christoph Schmidt, Grower at Gartenbau Drechsler, Germany
Interview Greenhouse
Light Insights
If you want a closer look at how growers experience light inside the greenhouse, take a moment to read our conversation with Eric van der Horst. He shares his view on light, the daily reality in a greenhouse, and how it shapes crop growth. You can find the full interview on the dedicated page.
Book a Free Demo
See how ProJoules improves greenhouse crop planning and helps you create a more accurate harvest forecast. No commitment, just a clear look at how it fits into your greenhouse.