Korean green tea, which is the mainly produced tea in South Korea, is divided into four quality grades according to a harvesting period. This tea is made only once in a year and mainly by handmade processing what makes this tea very limited and rare.
WOOJEON - "Pre Rain" - This is the highest-quality green tea, made from first spring young buds and leaves harvested before Gogu “Grain Rain,” (the period of a first warm spring rains), which usually falls on April 20. This grade of tea is the most tender, sweet and very limited due to its short harvesting period.
SEJAK - "Thin Sparrow Tongue" - This is the second highest-quality green tea harvested after the Gogu period and before early May's Ipha "Threshold of Summer" (the beginning of summer in traditional East Asian Culture), which usually falls on May 5th. This tea considered as the high-quality green tea and has a delicate floral, vegetal, umami profile Korean tea is famous for.
JUNGJAK - "Medium Sparrow Tongue" - Is the third harvest of the year, takes place on Soman "Day of Steady Growth", which usually falls on May 20th. Less quality, but still quite nice, tea leaves are used to create a green tea with more intense flavour.
DAEJAK - "Sparrow Beak" - Is the last green tea harvest pf the year, takes place on Haji ("Summer solstice" - ), which usually falls on June 21th. Made from mature tea leaves, this tea has a vegetal, nutty profile and more intense flavour.