Tanzania grows both arabica and robusta — 60.9 per cent arabica and 39.1 per cent robusta by production — and they come from opposite ends of the country. Arabica grows in the far north around Kilimanjaro, Arusha, Tanga and Iringa, and in the far south around Mbeya, Njombe and Mbinga; robusta comes almost entirely from Kagera in the north-west, by Lake Victoria. The grade letters on the bag — AA, PB and the rest — sort beans by size and density, not by how the coffee tastes. Tanzanian peaberry is the grade most buyers chase.
Those figures are from the USDA Foreign Agricultural Service’s Tanzania Coffee Annual (report TZ2025-0004), which also forecasts production of 1.45 million 60-kilogram bags for the 2025/26 marketing year, up from 1.35 million the year before.
Table of Contents
Corrections to an earlier version of this page
- It linked “Arabica coffee” to a URL that does not exist on this site —
/arabica-coffee-beans-explained/. Our arabica page is at /arabica-coffee-beans/, and the link now points there. - It cited the Tanzania Coffee Board’s website as the source for the grading system. That domain no longer resolves in DNS, so the citation could not be checked by anyone following it. The grading description below is now sourced to material that is actually reachable, and the USDA report above reproduces a Tanzania Coffee Board map of the growing areas.
- It carried three Amazon product links marked as sponsored but with no affiliate tag at all, and no disclosure anywhere on the page. One of the three, a Hario V60 dripper, now returns a 404 on Amazon. Two remain, correctly tagged, with the disclosure the law requires; the dead one has been removed.
- It said robusta is grown “at lower elevations, typically below 3,000 feet (900 meters)” without a source. Tanzanian robusta is concentrated in Kagera, and we have not found a figure for Kagera’s planting altitudes in a source we have read, so the claim has been dropped rather than restated.
- It stated as fact that coffee reached Tanzania “in the 16th century, when it was brought from Ethiopia by nomadic tribes”. See the history section below — the accounts do not agree, and this page no longer picks one and presents it as settled.
The grades, and what they actually tell you
Tanzania runs its own grading system, close to Kenya’s. The green coffee importer Genuine Origin describes it as factoring in “species, bean size, density, processing method, and cup characteristics”, and gives the commonly traded grades as “AA (screen sizes 17 & 18), AB (15 & 16), C (14 & 15), and PB for peaberry“. The full official export grade set is longer, running down through smaller and lighter separations. Screen numbers are the size of the sorting screen’s holes in 64ths of an inch, so AA simply means the beans did not fall through an 18.
PB is peaberry — “a genetic mutation where only one seed develops inside a coffee cherry instead of two”, producing beans that are “smaller, denser, and rounder than regular coffee beans” (Genuine Origin). That is a fruit-set outcome, not a rung on a size ladder.
The important thing about grade letters is what they do not promise. A grade is assigned after the coffee has already been grown, picked and processed; sorting big beans out of a lot cannot make the lot taste better than it is. This is the same point our page on Kenyan coffee makes about the Kenyan AA/AB/PB system, and it applies identically here: the letters describe the bean, the cup score describes the cup, and they are different measurements. “Tanzania AA” on a bag tells you the beans are large and were carefully sorted. It does not tell you the coffee is good.
Peaberry is a partial exception only in that it is a shape rather than a size, and it is genuinely scarce. How scarce is disputed: Royal Coffee says “peaberries typically occur in about 5% of all coffee worldwide, regardless of plant type or origin”, while Genuine Origin puts it nearer one cherry in nine. Both agree they have to be sorted out of the rest of the harvest, and both put the demand in Japan and the United States. Royal Coffee adds the commercial reality: “There seems hardly enough peaberry produced in Tanzania to meet demand.” Whether a peaberry lot tastes different from the same farm’s flat beans is a question this site has not cupped and will not pretend to have settled.
Where it grows
| Species | Share of production | Regions |
|---|---|---|
| Arabica | 60.9% | Far north: Kilimanjaro, Arusha, Tanga, Iringa. Far south: Mbeya, Njombe, Mbinga. |
| Robusta | 39.1% | Kagera, in the north-west corner near Lake Victoria. |
The same report describes the farming behind those numbers: about 90 per cent of production comes from 320,000 smallholder farmers, with the rest from around 100 large farms. Plots average 0.63 hectares and carry 400 to 2,000 trees, and the trees are typically more than 25 years old — which is why so much of Tanzania’s recent policy has been about replanting, with the Tanzania Coffee Board having distributed 13 million improved seedlings by November 2023. The harvest runs July to October.
One placement worth knowing when you buy: USDA classes Tanzania as one of three major global producers of Colombian Mild Arabica, alongside Colombia and Kenya, accounting for six per cent of that category. That is a trade grouping rather than a flavour promise, but it tells you which shelf importers file Tanzanian washed arabica on.
How it is processed
Most Tanzanian arabica is washed: the cherry is pulped, the beans are fermented to break down the remaining mucilage, then washed and dried. Washed processing is what produces the clean, high-acidity profile the country is bought for. Dry or natural processing — drying the whole cherry in the sun — is used as well, and gives a heavier, fruitier cup. Neither method is better; they are different products, and a bag that names its processing method is telling you something useful about what to expect.
Cooperatives do a lot of the work between the farm and the exporter. USDA notes that stable prices have strengthened Agricultural Marketing Cooperative Societies, which provide financing and training to growers — relevant if you are choosing between two similarly priced bags and one names the cooperative.
History, and what is actually documented
The accounts of how coffee reached what is now Tanzania do not agree with each other, and this page previously picked one and stated it as fact — a 16th-century arrival from Ethiopia carried by nomadic tribes. Other published accounts route the introduction through Réunion, the French island formerly called Bourbon, and put the first serious commercial planting far later, under German missionaries. We have not found a primary source that settles it, so this page states the disagreement instead of choosing a side.
What is not in dispute is the shape of the modern industry: smallholder-dominated, cooperative-marketed, export-oriented, and split between two species grown at opposite corners of the country. That is the part that affects what is in your cup.
What it tastes like
Washed Tanzanian arabica is bought for bright acidity, medium to full body, and dark-fruit character — blackcurrant and berry are the descriptors traders reach for. Robusta from Kagera is heavier and earthier, with more caffeine, and mostly goes into blends and instant coffee.
This site has not cupped a panel of Tanzanian lots, so it will not publish tasting scores or invent notes for a coffee you might buy. The roaster’s own notes on the bag are the claim that applies to the bag. What the origin gives you is a reasonable prior, not a guarantee — and a Kagera robusta and a Mbeya washed arabica have almost nothing in common beyond the passport.
Brewing it
Start at 55 g of coffee per 1 litre of water — about 1:18 by weight. That is the standard brew ratio in SCA Standard 310-2021, Home Coffee Brewers, section 7.1.5: “The standard brew ratio of 55 g of coffee per 1.000 kg of 17±3°C water”. A coffee “cup” is 6 fl oz, not 8, so one cup is about 10 g of coffee. Stronger means more coffee, not less — at 1:15 you are putting more grounds into the same water, not fewer. The SCA has removed this standard from its own site; the copy linked is an SCA-branded PDF we have checked contains that sentence.
Method-specific ratios are a separate matter and are not disagreements with that figure. Pour-over is commonly brewed at 1:13 to 1:16 and French press at 1:10 to 1:16, because those methods have different contact times and different filtration. Both suit Tanzanian arabica: pour-over keeps the acidity clean, French press gives it more body. Pick the ratio for the method, and keep the standard as your reference point when the two disagree.
For water temperature, see our page on the best temperature for French press coffee, which gives the range with its source rather than repeating it here. Grind just before you brew, and use filtered water.
Gear
Affiliate disclosure: the two product links below are paid links. As an Amazon Associate I earn from qualifying purchases. Your price is the same either way. Neither product has been tested by this site. They are listed because a French press and a burr grinder are the two pieces of equipment that change a cup of Tanzanian coffee most, not because we compared them against alternatives.
- Bodum Chambord French press on Amazon — a full-immersion brewer, for when you want body rather than clarity.
- Baratza Encore conical burr grinder on Amazon — consistent grind size is the single biggest lever on extraction.
For pour-over equipment and everything else, our page on coffee tools and accessories covers the category properly.
Buying Tanzanian coffee
- A roast date, not a best-before date.
- A named region — Kilimanjaro, Mbeya, Mbinga, Kagera. “Tanzania AA” alone tells you only the screen size.
- Species, if the bag is vague. Kagera means robusta. Northern and southern highland origins mean arabica.
- Processing method. Washed and natural are different drinks from the same farm.
For neighbouring origins with different profiles, see our pages on Rwandan coffee, Ethiopian coffee and Ugandan coffee.
