An Oolong Cultivar Takes Two Decades to Earn a Number, and Longer to Reach a Nursery
An oolong cultivar clears a fixed government pipeline of field trials, roughly fourteen to twenty-one years, before it earns a number, then a separate license before any nursery can sell it. Taiwan's newest release traces its parent stock back to the 1960s.
Before an oolong cultivar reaches the plant a grower can buy, it clears two gates, and they can stand years apart. The first is the number. Taiwan's cultivars, Jin Xuan and Cui Yu among them, and Fujian's, such as Jin Guanyin, earn an official name like Taiwan Tea No. 12 only after a fixed pipeline of field trials. Add its four stages and that pipeline runs roughly fourteen to twenty-one years before a name is even proposed. The second gate comes after the name: a separate license, granted under a different law, before any nursery may legally sell the seedling. The public name and the right to plant are two certificates, and the second can trail the first by years. The seed stock behind a modern release runs older than either, in the newest Taiwanese case by some sixty years.
The four field stages that come before a number
Taiwan's tea-breeding program lives at the Tea and Beverage Research Station (TBRS), the Ministry of Agriculture body that was the Tea Research and Extension Station (TRES) until its August 2023 restructuring, and its own published breeding process runs the same four gates every candidate has to clear (TBRS1):
| Stage | Typical duration | What gets tested |
|---|---|---|
| Cross and nursery | 2 to 3 years | Parents are chosen from the germplasm bank (local cultivars, imports, wild tea), crossed by hand, and the resulting seedlings are culled for weak growth before transplant |
| Single-plant selection | 4 to 6 years | Sprouting date, single-plant yield, and vigor, tracked yearly; survivors go through actual tea-processing trials and sensory panels |
| Strain comparison trial | 4 to 6 years | Cuttings from the surviving plants are propagated and grown out against a control cultivar in standardized plots |
| Regional trial | 4 to 6 years | The finalist is planted at TBRS's headquarters and its northern, central, and eastern branch stations, under both hand and mechanical harvest |
Only after a line clears all four does the station submit it for review and naming. Add the four stages and the ordinary path runs roughly fourteen to twenty-one years, and that is before the separate matter of a nursery license.
The certified number, and the market name added later
The number is the certification. The market name that shows up on a bag is added afterward, sometimes years afterward, and it is not the same act. Taiwan Tea No. 12 and No. 13, better known as Jin Xuan and Cui Yu, both cleared this pipeline and were named in 1981; that story, including why the station's own director hid the personal reason behind the names for two decades, already has its own home on this site (Jin Xuan and the milk that isn't milk).
The certificate a nursery needs, and it is a separate one
Getting a name is not the same as getting a license. A cultivar's economic life as a plant a farmer can legally propagate and sell runs through a second, entirely separate process: Taiwan's Plant Variety and Seed Act, administered by the Agriculture and Food Agency, which requires a candidate to demonstrate novelty, distinctness, uniformity, and stability (the same four-part DUS test used internationally for plant patents) plus an acceptable variety name before rights are granted (moa.gov.tw8). For a woody, perennial crop like tea, that grant runs up to twenty-five years.
That second gate is why Taiwan Tea No. 26, a green and black tea cultivar and the first the tea station has bred explicitly to be licensed as a commercial product rather than released into the public domain, could be named in a ceremony on June 11, 2024, and still leave growers waiting. Its number is not oolong, but the pipeline and the licensing law it crossed are the same ones every Taiwanese oolong cultivar crosses. Reporting on the release put the wait for propagation rights at roughly another two years before nurseries could legally sell seedlings, with a first commercial harvest three to five years after that (News&Market3; Agri-Harvest4).
Taiwan Tea No. 26 also shows how far back a candidate's origin can reach. Its maternal line traces to Keemun, imported from China's famous black-tea region as breeding stock. The tea station's predecessor began screening that material for a plant suited to Taiwan's climate in the 1960s, moved a shortlisted line into comparison plots in 2007, ran formal selection trials from 2008, and settled on line 5313 as the one that made superior green and black tea in Taiwan's conditions (News&Market3; Han-Yi tea blog7). Sixty years separate that first import from the naming ceremony, and the germplasm predates the formal trial by decades.
China certifies a cultivar through a different door
Mainland China runs the same underlying discipline (multi-year field comparison against a control variety before anything is certified) through a different institutional shape. Rather than one station carrying a candidate end to end, an individual research institute breeds a cultivar and then submits it up a two-tier government ladder: a provincial crop-variety review committee first, and, for cultivars judged fit for wide promotion, the national committee after that. China's national tea-cultivar committee was established in 1981, and across five review rounds from 1985 to 2002 it certified 124 national-level cultivars (17 grown from seed, 107 propagated clonally), alongside more than 200 additional provincial-level cultivars recorded separately (Hunan Supply and Marketing Cooperative11).
Jin Guanyin (金观音) shows what that ladder looks like for an actual oolong parent stock. The Fujian Academy of Agricultural Sciences' Tea Research Institute crossed Tieguanyin as the mother against Huangjin Gui as the father, running the selection from 1978 to 1999, a 21-year program comparable in length to Taiwan's own pipeline. The cultivar cleared Fujian's provincial review in 2000 and the national committee in 2002 (Cha Baike10), giving it the same two distinct milestones as a Taiwan release: an institute's own selection work, then a separate government body's sign-off before the cultivar counts as officially certified stock.
Worth keeping separate from all of this: certifying a brand-new cross is a different act from confirming the identity of a plant that already exists, the question a 2009 genetic test answered when it matched a widely grown clone to two of the six original Da Hong Pao mother bushes (No one has legally picked a Da Hong Pao mother tree since 2006). One process breeds and licenses something new. The other verifies that an existing plant is what growers already claimed it was.
The plant in your cup is older than its release date
None of this reaches the tin. It still fixes the true age of the cultivar you steep: a number registered in a given year can rest on field work decades old, and on seed older than that again. The oolong in your gaiwan cleared some fourteen to twenty-one years of trials before it earned its number, and its Taiwanese and Fujianese kin crossed the same gauntlet before them. The year on the bag is the last date in that record, not the first.