The research was carried out on three common orange varie-ties grown in the Quy Hop district, Nghe An province, includ-ing BH, Bu Ha Tinh and Ron, by using the questionnaire on the characteristics of 7-year-old orange varieties grown ac-cording to the production process of Nghe An Department of Agriculture and Rural Development. The results obtained on the agro-biological characteristics of 3 orange varieties named BH, Bu Ha Tinh and Ron, are the basis to help farmers under-stand the characteristics of orange varieties to identify, as well as provide scientific data for research institutions, manage-ment units in conservation, selection, production, supply and management of orange varieties in Nghe An province and the whole country.