The event, which will run until March 11, is held to celebrate the National Day of Bulgaria (March 3), and the 68th founding anniversary of diplomatic relations between the two countries.
On display are a variety of different roses, including thousands of rose trees from Bulgaria and several Vietnamese varieties that have been grown in the country for dozens of years, including a 200-year-old rose tree and other kinds of flower.
A number of cultural and art performances will also be held during the festival, including traditional street festivals and customary performances of both Vietnam and Bulgaria, as well as a parade of roses, musical performances and food events.