To optimize light-emitting diode (LED) spectral recipes for gerbera (Gerbera jamesonii) seedling propagation, seed germination and morphology, biomass, flowering, storage quality were observed in four cultivars, ‘Midi Dark Purple’, ‘Majorette Red Eye’, ‘Maxi Pink’, White’, under six spectrum treatments: (1) FL, cool white fluorescent light; (2) RB, a photon flux ratio of 85% red 15% blue (RB-LE...