Abstract
This study, which was carried out to determine the effect of planting times (April 15th, May 1st, May 15th) on agricultural properties in the species of Mentha longifolia, Mentha x piperita and Mentha spicata, was conducted in the trial field of Faculty of Agriculture in Ordu University in 2018-2019. In the study, plant height, fresh herb yield, drug herba yield, fresh leaf yield and drug leaf yield, essential oil rate and essential oil yield were investigated. In both trial years, the plantings of April 15 and May 1 generally came to the forefront in terms of the characters examined in all species. Looking at the species, Mentha longifolia took first place in essential oil ratio in both years, Mentha x piperita in all the features examined except for plant height, in the first year, and Mentha spicata in all characters, in the second year.
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