Spring equinox on mid March signals the start when spring weather can be enjoyed by most of the East Asian countries.
South Korea
In Seoul, most of the parks will amaze you with the sakura bloom. In the South, Jinhae is one of the popular sites among tourists if coming from Busan. Suggested to head off to these cities by first week or mid-month of April. In Gyeonggi-do, enjoy tulip festival in Everland.