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An experiment was conducted to study the ‘’Response of zinnia cultivars to boron levels’’ at ornamental Nursery, Department of Horticulture, The University of Agriculture, Peshawar during 2014. The experiment was Completely Randomized Design (CRD) having three replications. There were four boron levels (0 kg ha-1, 1 kg ha-1, 2 kg ha-1, 3 kg ha-1), and three zinnia cultivars (Coral dream, Yellow dream, Pink dream). The result showed that both boron and zinnia cultivars significantly effect in all parameters. Maximum number of flowers plant-1 (18.60), flower diameter (8.71cm), fresh flower weight (9.7g), plant height (40.04 cm), root length (16.3cm) and dry flower weight (1.90g) were observed in plots, supplied with boron at rate of 2kgha-1. Among cultivars Coral dream cultivar showed maximum plant height (35.7cm), flowers number plant-1 (15.04), fresh flower weight (8.5g), flower diameter (8.32cm), root length (13.28cm), and dry flower weight (1.60g). The interaction between boron levels and zinnia cultivars was significant for the observed parameters except plant height. Among different treatments zinnia cultivars, Coral dream and Yellow dream treated with boron 2kg ha-1 should be recommended for maximum growth and flowering attributes under the agro-climatic conditions of Peshawar.
Keywords: Boron; Cultivars; Zinnia