Cherry Blossom season started early April. It first started in the south, since it's warmer, and then it moves up. Once the flowers bloom, they only last about a week or two, which is unfortunate since it made everything look so pretty.
I was told that Jinhae is the best place to go to see the cherry blossoms. So we took a bus and with traffic it took us a very long time to get to Jinhae. In retrospect, we should have spent the night.