The frigid weather gives way to clear and sunny skies, leading many to wonder when the flowers will start blooming this year. This March has been warmer than the last, giving spring an earlier start. Beginning with the blooming of forsythias around March 30, other spring varieties are expected to follow. Flowers are predicted to bloom 1-4 days earlier compared to last spring.
Forsythias (Bloom Date: March 30th)
Azaleas (Bloom Date: April 1st)
Cherry Blossoms (Expected Bloom Date: April 9th)
credit
http://english.visitseoul.net/tours/Blooming-Season-in-Seoul-2018_/24896