This study was conducted in the fields and laboratories of the Department of Horticulture and Landscape Design/College of Agriculture and Forestry, University of Mosul. Gerbera plants were exposed to natural daylight or interference of the red and blue spectrum for four hours (one hour before sunrise and continuing one hour after, then two hours at sunset, one hour before sunset, and continuing for one hour after sunset). The plants were also sprayed with salicylic acid at 300 mg l-1, and sprayed with a mixture of micronutrients, namely iron, zinc, and copper, in the form of sulfates for the three elements, at 40 mg l-1 for iron, zinc and at 10 mg l-1 for copper. Some of the morphological and anatomical characteristics of gerbera inflorescences were studied. The results showed that the diameter of the inflorescence and its vase life were not significantly affected by the studied treatments, but prolonging daylight interaction with spraying the plants with salicylic acid led to recording the highest value for the amount of water uptake, 71.86 cm3, which was accompanied by recording the highest flowering age, 22.53 days, although it was not significant. The anatomical study indicated that prolonging daylight or spraying with salicylic acid or a mixture of micronutrients or their interaction led to a significant change in the thickness of the different components in the anatomical section of the inflorescence stalk at a distance of 5 or 30 cm below the inflorescence.
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