Energy efficient growing of top–quality roses

Published on
January 9, 2014

The competitive strength of the Dutch greenhouse rose industry is deliver top quality roses. For Red Naomi !, this is a constant production of flowers /(m².week), a bud size of at least 5 cm , a stem length of 60-80 cm with a stem weight of 50-70 grams and a shelf life of at least 10 days . The aim of the project : " A perfect rose - grown energy efficient " is to produce these roses, while simultaneously saving energy.

This is tested on a semi-commercial scale in a greenhouse of 1000 m², which is equipped with cooling, forced ventilation to control the humidity and with assimilation lighting through SON-T , above the crop and LED lights between the crop

In the first year of the project we aimed to build a plant that supplies the roses that match the criteria . And we succeeded . The next step is to get the energy input to a predetermined goal. The use of electricity for assimilation lighting was too high in the beginning of the production, but the last month of 2013 at the desired level . The heat used, for maintaining temperature and humidity , has been low in the summer , but in winter higher than the prediction. In summer the coolers gathered enough energy to heat the greenhouse during the winter period.

In 2014, this research continues. " A perfect rose - grown energy efficient " provided in the first year certainly not at once the answer what the best approach is to grow the perfect rose. Through the knowledge exchange with growers , consultants, suppliers and researchers and by testing new techniques it provide information that is important for the development of the cultivation of roses .

This project is part of the program Greenhouse as Energy source of the Product board Horticulture and the ministry of  Economic Affairs, 'Samenwerken aan Vaardigheden'. Participants in the project  are DLV, GreenQ Improvement Centre, LTO-Groeiservice and growers.