Jun 16, 2025

Grodan, Philips trial reduces heat input for tomatoes

Grodan and Philips Horticulture LED Solutions are advancing low-energy tomato production by integrating LED spectral dimming, advanced climate control and precise irrigation management. Their ongoing trial at the Botany Research Centre has demonstrated a 50% reduction in heat input compared to standard commercial practices.

The trial, launched in late 2023, involves partners including Ridder, BASF, Wireless Value, Normec Groen Agro Control and Maurice Kassenbouw. It explores energy savings through techniques such as dynamic light steering and Daily Light Integral (DLI) planning. Spectral dimming allows growers to deactivate less efficient LED colors based on available daylight, improving Light Use Efficiency.

“When automated control of spectral dimming is integrated into the climate computer…this option can save up to 3% on the light energy consumption,” said Raats of Philips Horticulture LED Solutions.

Grodan’s irrigation strategy, using stone wool slabs, targets low electrical conductivity while maintaining high yields and fruit quality. Adjusted nutrient recipes aim to increase fruit weight without compromising brix levels. Climate screens and improved heat recovery from dehumidification systems contribute to better thermal insulation and crop balance.

New sensors monitor vertical temperature profiles, helping growers optimize fruit ripening and nutrient distribution. The trial also supports improved understanding of humidity control as a next step in low-energy greenhouse cultivation.

Growers and consultants have shown increased interest, with some in the Netherlands already adopting active dehumidification systems based on the trial’s results.

Learn more about the trial on Grodan’s website.