Microgreens are plants, that have a developed root, stem, cotyledons and visible first true leaves and their above ground sections of plants are edible. Young greens are easy to grow and the crop is quickly achieved, since the growth lasts only 7-21 days. Microgreens often contain greater quantities of metabolites than fully developed vegetables. Metabolic content can be optimized by suitable production. Besides all that, we consume those young plants raw and therefore don’t destroy thermolabile substances, like ascorbic acid. We can alter the metabolic content of microgreens by certain light exposure. The experts often use LED lights in their research, because they enable control over light quality and intensity and easy photoperiod regulation. In comparison to older lighting systems like HPS and fluorescent lights, LEDs main deficiency are high costs. Species react very differently to various wavelengths, light intensity and photoperiod. Greater values of macro and micro elements, certain carotenoids, chlorophylls, anthocyanins and glucosinolates are often positively affected by blue and red light, with dominantly red spectre. In the same conditions the yield can be greater and the hypocotyl is shorter. The lighting during storage of cut microgreens is not recommended.
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