Osulloc tea is South Korea's best-known premium tea, built around organic green tea grown on the brand's own plantations on volcanic Jeju Island. Styled O'sulloc (and sometimes written as two words, O'Sulloc or O Sulloc), it is owned by the cosmetics group Amorepacific and has done more than almost any other name to put Korean tea — from single-origin Jeju greens to citrusy tangerine blends — on the map at home and abroad.
If you have seen neat triangular sachets of Jeju green tea, a tangerine-scented "island" blend, or photos of a wave-shaped tea museum ringed by green tea fields, you have already met Osulloc. This guide covers what the brand is, the story behind its Jeju tea gardens, what it is known for, and how to approach it if you are new to Korean tea.
What is Osulloc tea?
Osulloc is a South Korean tea brand whose roots go back to 1979, when Amorepacific group founder Suh Sung-whan began cultivating tea on Jeju Island as part of a personal mission to revive Korean tea culture. The name pairs the Korean word for tea with a nod to its home ground, and the venture has grown into the country's flagship premium tea label. In 2019 the tea business was spun out into its own dedicated company within the Amorepacific family, but the link to a global beauty group is still part of its identity — the same Jeju green tea that goes into a cup also shows up in the group's skincare.
What sets Osulloc apart from a supermarket tea brand is that it grows a large share of its own leaf on organic estates rather than only buying and blending. That vertical, farm-to-cup approach is central to how the brand markets itself and to why its single-origin Jeju teas carry a premium reputation. For a wider view of where green, roasted and blended teas sit in the tea world, see our overview of the main types of tea explained.
The story: reclaiming tea fields from Jeju's volcanic land
The heart of the Osulloc story is Jeju Island, a volcanic island off the southern coast of the Korean peninsula. Its mild, misty maritime climate and mineral-rich basalt soil are well suited to tea, but in the late 1970s much of the land Osulloc now farms was rough, rocky wasteland. The founder is said to have surveyed the barren Dosun area at the foot of Hallasan (Halla Mountain) more than a hundred times, clearing stones and scrub to plant the first tea gardens around 1979 to 1980.
From that beginning the brand built out its now-signature Jeju estates. Three organic tea gardens are most closely associated with Osulloc — Seogwang, Hankyung and Dosun — each with slightly different elevation, wind and soil, which the brand uses to grow leaf for different teas. (Osulloc has also cultivated tea elsewhere, and exact estate line-ups can shift over time, so treat any single map as a snapshot.) The pitch is straightforward: certified-organic leaf, grown on volcanic Jeju soil, picked and processed by the same company that sells the finished tea. That is the origin behind the "Jeju tea" identity you see on the packaging.
The O'sulloc Tea Museum
Osulloc did something unusual for a tea company: it turned its farm into a destination. In September 2001 it opened the O'sulloc Tea Museum at the Seogwang estate on Jeju — reportedly the first tea museum in South Korea — surrounded by open rows of green tea. Part exhibition space, part café and shop, part viewpoint over the fields, the museum has become one of Jeju's most-visited attractions, drawing well over a million visitors a year.
The museum matters beyond tourism. By pairing tea with a photogenic building, green-tea desserts and a tasting café, Osulloc helped reframe Korean green tea as something to seek out and enjoy slowly, not just a plain everyday drink. It made "going to see the tea" a normal thing to do, and gave the brand a physical home that anchors its premium, place-based image.
What Osulloc is known for
Osulloc's range splits broadly into single-origin Jeju green teas and a family of signature blends, most sold as loose tea or in the brand's tidy triangular sachets.
Single-origin Jeju green tea
The purist end of the range is Osulloc green tea made from a single estate's leaf, often sold by pluck grade — earlier, more tender pickings (sometimes labelled with names like Sejak or Woojeon) command higher prices and give a sweeter, more delicate cup. Expect fresh, grassy-green flavours with a soft marine minerality that reflects the island's climate. Korean green tea is generally pan-fired rather than steamed, which tends to give it a rounder, nuttier profile than many steamed Japanese greens — a useful contrast if you already know Japanese tea types like sencha. Osulloc also makes roasted green teas and matcha-style green tea powders for lattes and baking.
Signature blends and tangerine tea
The other side of the catalogue is playful. Osulloc leans on Jeju's famous tangerines for its citrus-green blends, and builds floral and fruit blends around evocative "island" names — teas evoking moonlit or coral-toned Jeju scenery are among its best-known gift-shop buys. These blends are aromatic, sweeter and more approachable than a bare single-origin green, which is exactly why they travel so well as introductions and presents. Green tea itself is prized for its antioxidants and light, clean character; if that side interests you, our guide to green tea benefits digs into it.
Osulloc styles at a glance
| Osulloc style | What it tastes like | Good for |
|---|---|---|
| Single-origin Jeju green (higher grades) | Fresh, grassy-sweet, soft mineral finish | Sipping slowly; tea lovers who want the "real" Jeju cup |
| Roasted green tea | Toasty, nutty, low bitterness | Easy everyday drinking; evening cups |
| Tangerine / citrus green blend | Bright, juicy orange-peel lift over green tea | Newcomers; iced tea |
| Floral & fruit "island" blends | Sweet, fragrant, dessert-like | Gifting; light, low-fuss afternoons |
| Green tea powder (matcha-style) | Vivid, vegetal, gently umami | Lattes, desserts and baking |
How Osulloc shaped Korean tea culture
Korea's drinking culture leans heavily on coffee, and its deepest tea traditions run through Buddhist temples and formal ceremony rather than everyday cups. Osulloc's contribution was to make sipping quality Korean green tea feel modern, casual and desirable — through its cafés, its museum, its clean packaging design, and a wave of green-tea desserts (cakes, ice cream, roll cakes and lattes) that put Jeju green tea in front of people who might never brew a pot at home. It is one of the main reasons Korean green tea has a recognisable global face at all. For the wider picture of the country's tea history, ceremonies and everyday habits, see our dedicated guide to Korean tea explained.
How to approach Osulloc as a newcomer
You do not need special equipment or ceremony to start. A few easy on-ramps:
- Start with a Jeju green or a tangerine blend. A mid-grade single-origin Jeju green shows you what the estates actually taste like, while a tangerine/citrus green blend is friendlier and forgiving if you find plain green tea too vegetal.
- Brew green tea gently. Korean and other green teas are happiest with water that is off the boil (roughly 70–80°C / 160–175°F) and a short steep of a minute or two — boiling water and long steeps are what make green tea taste bitter. Taste as you go and adjust.
- Try it iced. The tangerine and fruit blends make bright, refreshing iced tea, which is an easy way to enjoy Osulloc in warm weather.
From there you can climb toward higher single-origin grades, roasted teas, or the green tea powder if you like matcha-style lattes. There is no wrong entry point — the blends and the purist greens are simply different moods.
Is Osulloc worth it?
Osulloc sits at the premium end of everyday tea. What you are paying for is the estate story — certified-organic leaf grown on Jeju's volcanic soil by the company that sells it — plus consistent quality and polished packaging. Whether that premium is "worth it" depends on how much the single-origin, place-based angle matters to you. As a way to taste genuine Korean green tea, or to hand someone a distinctly Korean gift, it is one of the most reliable names to reach for. And because the range spans grassy purist greens through sweet citrus blends, most people can find an Osulloc tea that fits their taste — which, more than any single product, is why the brand became the face of Korean tea.