Rowan Berry Care: August Irrigation Crucial for Vitamin Rich FruitRowan berries are a concentrated source of vitamins C, P, A, and B group, but maintaining the tree in August is critical to ensure these fruits develop without being lost to pests or winter vulnerability. Photo: Pravda.Ru by Dmitry Belov is licensed under Все права защищены Rowan berriesAugust Care: Irrigation and Nutrient ManagementDuring August, rowan trees actively fill their berries. Fertilization strategies must shift in late summer. Roman Edigarov, agrochemist: "In late summer, the tree must direct all its energy toward ripening berries and preparing for winter. How to Harvest and Reduce Bitterness in Rowan Berries A sequential process for harvesting berries without damaging the tree and removing natural astringency.