Kenyan tea, explained: the black workhorse and purple tea

Kenyan tea is, in most cups, a brisk black tea from the equatorial highlands on both sides of the Great Rift Valley, processed by CTC machines into small granules that brew fast, dark and strong, which is why so much of it ends up inside tea bags and breakfast blends rather than sold under its own name. Kenya is the world's largest exporter of black tea, and the Mombasa auction where most of it is sold is the largest black tea auction anywhere. The country also grows one genuine rarity: purple tea, from a cultivar bred for the violet pigment in its leaves, which brews into a lighter, fruitier cup with a faint lilac tint. In our catalog, Kenyan Black brews at 208°F (98°C) for 3½ minutes with 2.5 g per cup at level 3 on our 0–3 caffeine scale, and Kenyan Purple brews at 194°F (90°C) for 3½ minutes with 3 g per cup at level 2.

Where Kenyan tea grows

Tea in Kenya grows high, between roughly 1,500 and 2,700 meters, on red volcanic soil in two belts: west of the Rift Valley around Kericho and the Nandi Hills, and east of it around Limuru, Kiambu and the foothills of Mount Kenya. Kericho is the largest single tea district in Africa and the home of the big estates; the eastern belt is mostly smallholders, families with a few acres who deliver green leaf to a factory run by the Kenya Tea Development Agency, the KTDA, which was set up in 1964, the year after independence, and whose farmers supply about 60% of the national crop. The first tea bushes were planted at Limuru in 1903, and the commercial estates around Kericho followed in the 1920s. Sitting on the equator, the bushes never go dormant: pluckers take two leaves and a bud every one to two weeks all year round, with the best leaf coming out of the dry months. Our Kenya origin page puts the country next to its neighbors in the catalog.

Why most Kenyan tea is CTC, and what that does to the cup

Well over nine tenths of Kenya's output is made by the CTC method, short for crush, tear, curl. Instead of rolling whole leaves the orthodox way, rotating toothed rollers shred the withered leaf into tiny, even pellets, which oxidize fully in an hour or so and are then dried and sieved into grades with names like BP1, PF1, PD and Dust, from the largest granule to the finest. The pellets are built for a fast, strong cup with milk: because the leaf is broken so small, the water reaches everything at once, the color turns coppery red within a minute and the briskness, the clean, slightly astringent snap that blenders prize, comes through strongly. That is exactly the profile a breakfast blend wants, which is why Kenyan leaf is the backbone of so many of them, usually without being named on the box. Orthodox, whole-leaf Kenyan teas exist, from a few estates in the Nandi Hills and around Mount Kenya, and they are smoother and more nuanced, but they are a small specialty next to the CTC flood. If you want the fuller story of how the tea types are made, our beginner's guide to tea types walks through it.

What Kenyan black tea tastes like

Our catalog records Kenyan Black as robust, malty and full-bodied, and lists it for the morning and mid-morning. Next to Assam, its closest relative on the shelf, it is a little less sweet and a little brighter, more copper than mahogany, with the briskness up front; next to a Ceylon from the Sri Lankan highlands it is heavier and rounder. Plain, it has a drying finish that some people love and others soften with milk, and it takes milk and sugar without disappearing, which is the whole reason it rules the tea bag. At level 3 on our caffeine ladder it sits with the breakfast blends and Turkish tea, a first-thing-in-the-morning cup rather than an evening one. For the table, our pairing page for Kenyan Black goes dish by dish, and the same brew works cold: our iced Kenyan tea with passion fruit uses the briskness to carry the fruit.

Purple tea: the other Kenyan tea

Purple tea comes from a single cultivar, TRFK306/1, selected by the Tea Research Foundation of Kenya, now the Tea Research Institute, from plants whose young leaves carry a visible purple-bronze cast. The color comes from anthocyanins, the same family of pigments that colors blueberries and red cabbage, which the plant makes in larger amounts under the strong equatorial sun at altitude. The cultivar went out to growers as a trial release in 2009 and was cleared for commercial planting around 2011, which makes purple tea one of the youngest specialty teas in the world: a plant-breeding achievement, not a centuries-old terroir. It grows mainly on small dedicated plots around Mount Kenya, in Kirinyaga and Nyeri, at 1,800 to 2,200 meters, and its output is a tiny fraction of the national crop. The leaf is usually handled the orthodox way, rolled whole rather than shredded, with a shorter, gentler oxidation, so that the cup stays light. Our catalog lists it at level 2 for caffeine with fruity, soft, sweet notes, and it earns them: the liquor is pale copper with a faint violet edge, there is a wild-berry sweetness in it, and the astringency that defines CTC Kenyan is mostly absent, so it drinks well without milk. We list it for the morning through early afternoon, and our pairing page for purple tea leans into berries and soft cheeses for that reason.

How to brew both at home

Kenyan Black wants near-boiling water: 208°F (98°C), 2.5 g per cup, 3½ minutes. CTC leaf extracts fast, so if you are used to steeping a whole-leaf black tea for five minutes, stop earlier here; at four minutes and beyond the cup goes from brisk to harsh, and the fix for a harsh cup is less time, not less leaf. If you take milk, brew it strong and short rather than long. Purple tea is the opposite case: 194°F (90°C), 3 g per cup, 3½ minutes. The slightly cooler water protects the sweetness, and the extra half gram makes up for the whole leaf giving itself up more slowly than pellets. Taste it plain first. Both teas take a second steep, though the CTC pellets have much less left to give. If you brew without an infuser, our loose leaf without an infuser guide covers the simplest setups, and the full brewing chart has every type in the catalog side by side.