Sejak tea can be produced from any green tea harvested within the periods between gogu and ipha. Sejak is the second pluck of green tea leaves after [[woojeon]], which is the first pluck that takes place on or before gogu. Tea farms across Korea produce sejak tea including the farms on Jeju island, Hadong county, and Boseong county. | Sejak tea can be produced from any green tea harvested within the periods between gogu and ipha. Sejak is the second pluck of green tea leaves after [[woojeon]], which is the first pluck that takes place on or before gogu. Tea farms across Korea produce sejak tea including the farms on Jeju island, Hadong county, and Boseong county. |