Supplemental LED Lighting Produces Higher Quality Long-day Perennials

MSU Coreopsis Photobiology
LED-Grown Flowering Coreopsis at Michigan State University

This LumiGrow study uses LED fixtures, HPS fixtures, and low-intensity flowering bulbs to examine the effects of light quality and intensity on flowering perennial plants in a greenhouse environment. By exploring the effects of different spectral ratios and light intensity with the same photoperiod, we enable growers to influence plant morphology and health while saving energy.

The results of the study demonstrated that LEDs are as effective as HPS and flowering bulbs at inducing flowering and generally produce higher quality plants with more branches and flowers. The highest quality plants were grown under 90 µmol-m-2-s-1 of light from LumiGrow LEDs.

Authors

  • Roberto Lopez, Michigan State University, Lansing, Michigan, USA
  • Anthony Soster, Michigan State University, Lansing, Michigan, USA
  • Brian Poel, LumiGrow, Inc., Emeryville, California, USA
  • Melanie Yelton, LumiGrow, Inc., Emeryville, California, USA