Attar yield by picking hour Milliliters of rose oil distilled per metric ton of fresh petals. Bar chart showing dawn harvest has the highest attar yield Six harvest times compare rose oil yield per ton: 4:30 has 842, 5:30 has 914, 6:30 has 783, 7:30 has 648, 8:30 has 522, and 9:30 has 431 milliliters. 950 760 570 380 ml/t 842 4:30 914 5:30 783 6:30 648 7:30 522 8:30 431 9:30 Peak concentration before sunrise clears the rows