TRFK 31/8

One of the most widely planted clonal cultivars in Kenya, selected for yield and for the bright, brisk, deeply coloured liquor that CTC blending demands.

Camellia sinensis var. assamicaTRFK 31/8Kenya

Where it sits in the botany

TRFK 31/8 is recorded under Camellia sinensis var. assamica, the variety group one level above cultivar. It is associated with Kenya, which is where it was selected or is most widely planted rather than the only place it grows.

Registration code: TRFK 31/8. A breeding or registration code identifies the selection in an institutional register and is often the name a grower uses when the trade name is not.

Also transliterated as: trfk 31/8.

What the plant is like

Kenya’s reputation for consistency rests on clonal planting of a small number of cultivars like this one — an agronomic decision that shapes what the world’s teabags taste like.

Why a grower plants it

Yield, hardiness, when it buds, what it resists and whether a machine can cut it. This is the half of a cultivar’s identity that decides what is actually in the ground, and it is usually left out of writing aimed at drinkers.

Selected for a system rather than for a cup. Kenya's equatorial highlands give year-round flushing with no dormant season, and a clone that suits them needs sustained yield rather than a good spring, uniform shoots that a two-leaves-and-a-bud plucking standard can take by hand or machine, and enough vigour to recover from being cut every seven to fourteen days indefinitely. TRFK 31/8 does that, propagates readily from cuttings, and performs at the altitudes where most Kenyan tea sits. The corresponding exposure is the familiar one: a national crop carried by a handful of clones is a narrow genetic base facing a changing climate, and Kenya's own research programme has said so.

What it does in the cup

As CTC black tea it gives a bright coppery liquor, marked briskness and enough colour and body to hold up to milk and to hard water — the specification the blending trade buys against rather than a flavour anyone chose.

How much of this is really the cultivar?

Almost nothing a drinker experiences in a mainstream teabag can be traced to this cultivar, and that is the interesting fact rather than a dismissal. CTC processing — cut, tear, curl — is a violent, standardising manufacture designed to produce a fast-extracting uniform particle, and it flattens cultivar differences far more thoroughly than orthodox processing does. On top of that, a supermarket blend is assembled from many gardens and several countries and rebalanced batch by batch to hit a fixed target, so consistency is manufactured downstream by a blender. TRFK 31/8's real contribution is agronomic: it is why the raw material exists in that volume at that price.

Cultivar, growing site and processing all shape a cup, and the cultivar is very often the smallest of the three. It is also the one that fits on a label, so almost every commercial incentive runs toward overstating it. This section is on every cultivar page that has been reviewed for it, including the ones where the honest answer is “less than you would think”.

What it is usually made into

The categories this cultivar is typically processed into. It is a statement about common practice, not a limit — processing decides the category, and a cultivar can be taken down more than one route.

Black tea — Tea taken deliberately through full enzymatic oxidation, giving the dark leaf, amber-to-red liquor and malty or brisk character most Western drinkers think of as simply 'tea'.

Teas in the catalogue made from TRFK 31/8

Kenyan black tea

Sources

TeaHQ editorial synthesis — TeaHQ

This page is TeaHQ’s own synthesis throughout. No breeding register or institutional record stands behind the account above, which is why the origin note carries its confidence in the open rather than reading as a citation.

How TeaHQ handles sources

Written comparisons

Where TeaHQ has set this cultivar against something it is routinely confused with, and argued the differences out in full.

TRFK 306 vs TRFK 31/8 — Two Kenyan clonal cultivars that show what a research-led planting programme does to a national industry. One is the purple-leaf plant behind Kenya’s purple tea; the other is a workhorse selected for the brisk coloured liquor that CTC blending demands.