Abstract
Light intensity is an important factor affecting the flowering of Gladiolus. Insufficient illumination from sprouting to the 4-leaf stage decreased flowering percentage. However, the inflorescences of those plants which did flower under conditions of low light intensity were normal and developed the full number of florets per spike. Plants at the 4–6 leaf stage were most sensitive to prevailing light conditions. Low light intensity during this period decreased both the percentage of flowering and the number of florets per spike. After this stage only the number of florets per spike was affected by insufficient light.
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