Phenological Characteristics of Commercial Blackberry Varieties in the Moscow Region Conditions

The aim of the study is to compare the phenological phases of early and mid-season blackberry varieties grown in the northern Moscow region. The studies were conducted at the LOVe Berry berry nursery (Moscow Region, Klinsky District) in 2021–2025. The phenological development of blackberries was studied using the methodology for studying fruit, berry, and nut crops. Over the years of research, the earliest bud break occurred in the Karaka Black (05.04), Loch Tay (05.04), Brzezina (05.04), and Natchez (05.04) varieties, while the latest was observed in the Caddo (09.04) and Victoria (10.04) varieties. The latest completion of shoot growth was noted in 2024 for the Victoria (08.10) and Brzezina (02.10) varieties. The shortest period of shoot growth in 2022 was noted by the varieties Natchez (142 days) and Caddo (147 days). In 2022, the earliest end of shoot growth was noted for these varieties Natchez (08/28) and Caddo (09/04). The earliest period of budding in 2025 was noted by the varieties Karaka Black (05/20), Loch Tay (05/23) and Columbia Sunrise (05/23). The earliest ripening of fruits was noted in 2025 for the varieties Hall’s Beauty (07/13), Columbia Sunrise (07/15), Loch Tay (07/15), Karaka Black (07/15) and Natchez (07/15), the latest – for blackberries Victoria (08/03) and Brzezina (08/03). Over the years of research, the Columbia Star (41 days), Brzezina (35 days), and Victoria (32 days) varieties were distinguished by a long fruiting period. A short fruiting period was noted for the Karaka Black (20 days), Caddo (24 days), and Natchez (26 days) varieties.