Now a day, hydroponics production of strawberry in greenhouse is common and the control of vegetative growth for proper fruit production is necessary. Therefore the effect of paclobutrazol and manganese sulfate on vegetative and reproductive growth of strawberry for high yield was investigated. For this purpose, rooted runners of strawberry cv. Paros were taken from Sadra greenhouse. Daughter plants were potted in pots containing peat moss and perlite (1:1v/v). When daughter plants produced 5 or 6 completely expanded leaves, foliar application of paclobutrazol (0, 20, 40 mg/l) and manganese sulfate (0, 1.5, 3 g/l) were sprayed to the point of run off. Short day conditions were imposed for flower induction for 21 days from 4 PM to 8 AM the next day. The criteria measured at this project were leaf area, number of leaves, petiole length and dry weights of shoot and root, inflorescence length, number of inflorescence, number of flower per inflorescence, number of ripe fruit, vitamin C, and soluble solid. Results indicated that paclobutrazol decreased number of petiole length. Leaf area and dry weight of shoot were also decreased with paclobutrazol (40 mg/l). Leaf area was increased and petiole length was decreased due to foliar application of manganese sulfate. Application of manganese sulfate at 1.5 g/l decreased number of leaves and increased dry weight of shoot at 3 g/l. Number of flowers and inflorescence length were decreased at 40 mg/l of paclobutrazol. Paclobutrazol caused a reduction in the number of fruits. Lower number of flower was obtained at higher concentration of manganese sulfate. Number of fruit was greater in manganese sulfate (1.5 g/l) treatment. Paclobutrazol treatments increased chlorophyll contents. Paclobutrazol at 20 mg/l concentration decreased vitamin C content. Manganese sulfate at 1.5 g/l increased vitamin C and decreased acidity of fruit considerably. Manganese sulfate (1.5 g/l) has a positive effect on vitamin C and total soluble solids.

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