The paper presents research results and observations made on the development of phenological phases during 2016-2018on the blueberry varieties studied in the Republic of Moldova. The studied blueberry varieties were: Blueray, Early Blue, Azur and Lax. It was established that in blueberry varieties under study unfolding takes place in the period from 09.03 until 29.03. Duration of unfolding and bloom varies between 34-38 days. Flowering lasts from 12 to 19 days during the period from 13.05 until 21.05. Fruit maturation occurs 60-69 days after the start of flowering in the period from 15.06 until 26.08. The length of the blueberry ripening period is 42 - 50 days. For varieties studied, the period from the beginning of the vegetation to the maturation of fruit varies between 104 and 114 days.