T78
One of the Darjeeling estate clones, named — as B157 and P312 are — for the garden it was selected on rather than by a central breeding programme. It sits alongside AV2 in most modern Darjeeling replanting, and the pattern the four of them make is the real subject: Darjeeling's clonal material was found on its own hillsides by its own planters, not issued from an institute, which is why the names are estates and the records are patchy.
Where it sits in the botany
T78 is recorded under Variety group not established, the variety group one level above cultivar. It is associated with India, which is where it was selected or is most widely planted rather than the only place it grows.
Registration code: T78. 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: t78, tukdah 78.
Where it came from
Selected on a Darjeeling estate from existing planted stock and vegetatively propagated, in the same estate-level selection practice that produced B157 from Bannockburn and P312 from Phoobsering.
How firm this is: Inferred rather than taken from a primary breeding or registration record. The naming convention and the estate-selection practice are well established. The selection date, the parent bush and the recorded traits of this particular clone were not verified against a primary record, and Darjeeling's clonal documentation is thin generally.
What the plant is like
A clonal selection propagated by cuttings, so a planted section is uniform in bush size and flush timing where the old seed-grown stock beside it is not. Its individual traits are less consistently reported than AV2's.
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.
Darjeeling's agronomic problem is age. Much of the district was planted in the nineteenth century, the bushes are long past their productive peak, yields per hectare are among the lowest of any major tea district, and the slopes are steep enough that replanting is slow, expensive and erosion-prone. Estate clones like T78 exist because replanting had to happen and waiting for an institutional programme was not an option. What a clone buys is uniformity — even shoots, even flush timing, a plot that can be picked to a fine standard economically — and what it costs is the deeper rooting and the genetic spread of seed-grown stock on a hillside that gets monsoon rain in quantity.
What it does in the cup
Reported as giving a fuller, more conventionally Darjeeling black-tea character than AV2's high floral aroma, and it is more often found in blended estate lots than sold as a single-clone tea. TeaHQ states this less confidently than it states AV2's profile, because far less is written about it.
How much of this is really the cultivar?
Single-clone Darjeeling is a small speciality; nearly all Darjeeling is a blend of clonal and seed-grown material picked across a garden on the same day, so the cultivar variable is averaged out before it reaches a chest. The variables that actually move a Darjeeling are flush — first, second, monsoon, autumn — then oxidation level, then garden and elevation. It is worth adding that muscatel, the term the district is sold on, is associated with jassid feeding damage on second-flush leaf and is not a property of any cultivar at all.
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 T78
Other cultivars in Variety group not established
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.