The new LED light recipe for the Philips GreenPower LED toplighting module, improving both quality and yield of cut roses, is available as of now and is the result of many months of research in cooperation with Wageningen University (WUR) in the Netherlands.
Six light recipes were tested on the Red Naomi rose variety at the IDC LED. The trial also featured three feedback meetings in which growers, researchers and experts judged the crop during a blind testing. The Deep Red/White/Far Red (DR/W/FR) light recipe performed best in the test, as it both increased production and improved quality.
The result of two years of research
The research was conducted during the spring of 2017 and built on the work we did in 2016, in which we tested the effects of 100% LED light on cut roses. At that time, Signify (Philips Lighting) installed two light spectra: 2/3 of the area with Philips GreenPower LED toplighting Deep Red/Blue/Low Blue (DR/B-LB) and 1/3 of the area with Philips GreenPower LED toplighting Deep Red/White/Low Blue (DR/W/LB) with a focus on increasing production. During the summer and autumn of 2016 both yield and quality improved. In the winter of 2016-2017 the production (gram/mol) with LED lighting was similar to that with HPS, but the quality of the cut roses did not meet growers’ expectations and so it was decided that more research was needed to find the optimal recipe for cut rose growth, especially during the winter months. This resulted in the new LED light recipe.
The new LED spectrum will be tested further at the Delphy Improvement Center, which is also in the Netherlands. The trial at Delphy will incorporate the knowledge gained from the WUR’s experiments on climate, watering, fertilization, and juvenility. We will keep you updated on the outcome of the trial, so you can provide your customers with the latest information for the upcoming season.
For further information, please contact your Key Account Manager.