Maximum porosity 75%,
Volcanic ash soil

Jeju soil boasts its world’s best porosity, which facilitates the flow of water and air while containing organic matter ten times more than average soil does. Porous basalt pebbles help grow better tea leaves by improving soil quality.

Annual average temperature 16ºC,
temperature for premium green tea

OSULLOC green tea in Jeju grows to become premium green tea benefiting from warm sunlight all year round with the annual average temperature of 16℃.

Annual average precipitation 1,800mm,
Keeping volcanic ash soil moist

With annual average precipitation of 1,800mm, Jeju grows healthy tea trees throughout the year with clean air and naturally clean water filtered by volcanic ash soil.

Annual average 4~7m/sec,
Island of wind

Strong sea breeze from the south at 4-7m/sec enriches the aroma of green tea by enhancing the water uptake of roots while enabling clean production of green tea by cleaning impurities from the tea leaves.

Sea fog occurs 25 days on average annually,
Perfect shading

Surrounded by seawater, Jeju has sea fog for 25 days on average annually, which provides natural shade that enhances the taste and color of tea leaves, creating the best green tea.

One of world’s three major tea fields,
394,200 hours

394,200 hours of beautiful devotion out of 45 years by OSULLOC have made Jeju one of the world’s three major tea fields along with Huangshan in China and Mt. Fuji in Japan.

129,600 minutes
for sprouts to become tea leaves

Mountain breeze containing the remaining snow at Hallasan Mt. and sea wind comes day and night to the tea fields enhancing the aroma of the tea trees

60 seconds
for brewing a good cup of tea

In addition to the time and effort put into growing good tea leaves, every minute and every second for tea preparation counts for different taste and aroma of a cup of tea. Good time for relaxation can come with a good cup of tea prepared with time and effort.

1.50 million,
Annual visitors to Tea Museum

Since the opening of Tea Museum, the number of annual visitors has seen a continued increase to record 1.5 million as of 2015.

five key elements of OSULLOC tea fields

Soil, sunlight, water, wind, and mist are five elements of OSULLOC tea fields. Jeju soil knows how to grow tea. Jeju sunlight is always there, but always fresh. Jeju water is not jealous of tea. When winds dies down, comes serenity signaling the beginning of tea season. Jeju mist knows how to caress dry tea leaves thoughtfully.

Tea fields by OSULLOC,
200m above the sea level

OSULLOC’s tea fields are 200m above the sea level where warm and humid wind comes from the sea during the day while cool and drier wind comes from mountains at night, making the aroma of green tea even stronger.

100 days
Curing time for Samdayeon

Samdayeon by OSULLOC, the world’s first tea created through the curing process for 100 days in boxes made of Jeju cedar, bears the natural scent of cedar, which contributes to the unique color and aroma of Samdayeon.

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