Plants can take more than we often think : Tomato not affected by high humidity at night

Research in the VenLowKas trial greenhouse in Bleiswijk, the Netherlands, has been geared up for growing in a (very) high humidity. The climate control is set to a moisture deficit of 1 gram water per m3 air. Botrytis has not been a problem and production is clearly ahead of the previous year. “The heating was hardly on during the last five months. We anticipate the total energy consumption being the equivalent of around 10 m3 natural gas per m2, including the electricity consumption for the air circulation,” says Feije de Zwart, of Wageningen UR Greenhouse Horticulture.