Unwin Teji, Jemima; Cai, Xuexuan; Mucklejohn, SA; (2025) The Influence of Spectral Power Distributions on the Growth of Red Spinach (Amaranthus Dubius). In: CIE Midterm Meeting. CIE (International Commission on Illumination): Vienna, Austria. (In press).

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Abstract

Red spinach is a leafy vegetable with high nutritional value widely grown in subtropical and tropical regions, it appears to be an ideal candidate for production in large scale protected environments. Red spinach plants have been exposed to various LED arrays to establish the influence of the spectral power distribution on the growth of the plants up to harvesting. The LED arrays were classified as white, white with enhanced red content, white with enhanced blue content and a combination of predominantly red plus blue radiation. Detailed measurements of plant growth parameters: stem height; number of leaves; leaf length; leaf width; fresh weight after harvesting, allowed the plants’ progress to be compared. Another batch of plants were grown outdoors under natural light. These experiments highlighted the need to establish conditions under which red spinach could become economically viable.

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