نور عبدالله محمد الربيعه

This study was conducted to explore the effect of spraying arginine at four concentrations (0, 10, 20, and 30 mg L⁻¹) and chelated zinc at four concentrations (0, 20, 40, and 60 mg L⁻¹) alone or in combination on the growth parameters (plant height, number of leaves, total leaf chlorophyll content, and leaf soluble carbohydrate content) and flowering traits (number of inflorescences and length of inflorescence stalk) of geranium plants, Pinto Premium Deep Red cv. Plants were sprayed three times at a monthly interval, with the first spraying beginning 32 days after the seed sowing date. The experiment was carried out using a Randomized Complete Block Design (RCBD), and the data were analyzed using one-way ANOVA. Comparisons were made according to the Least Significant Difference (LSD) test at a probability level of 0.05. Results showed that spraying with arginine at a concentration of 30 mg L⁻¹... Combined with chelated zinc at a concentration of 60 mg L¹ resulted in a significant increase in plant height, number of leaves, total leaf chlorophyll content, leaf soluble carbohydrate content, number of inflorescences, and inflorescence stalk length compared to the control treatment and the individual treatments for both arginine and chelated zinc. Keywords: Pelargonium hortorun, Geranium, Arginine, Chelated Zinc