Plucking standard

What it is

Every tea is picked to a standard, stated or not, and it is one of the few facts about a tea that can be checked directly by unrolling a wet leaf and counting. Bud-only picking gives the downy, low-yield material of silver needle white teas and the finest Chinese greens. Bud and one or two leaves is the ordinary fine standard across most of China, Japan, Darjeeling and Nepal. Bud and three or more leaves, and deliberately mature leaf, is the standard for oolong, for dark tea and for most volume black tea, because those processes want material with enough substance to survive shaking, piling or maceration. TeaHQ records it as an enumerated field rather than a description because it is a categorical decision, not a spectrum.

Also transliterated as: cai zhai biao zhun, caizhai biaozhun.

What it does to the leaf

Fixes the ratio of bud, young leaf, mature leaf and stem entering the factory, which sets how much moisture, how much structural fibre and how much aromatic precursor the intake carries.

What it does to the cup

Finer standards give lighter body, more downy sweetness and more delicate aromatics; coarser standards give more weight, more grip and more of the material that heavy processing needs.

Variants that matter

Ways this step is carried out that produce genuinely different results, rather than regional names for the same thing.

Bud only

Silver needle white teas, Junshan Yinzhen, the highest grades of Chinese green. Very low yield per hectare and a correspondingly steep price.

Bud and two leaves

The default fine standard, and the one most often quoted on packaging. It balances aroma from the bud with the substance the leaves carry.

Open leaf without bud

Oolong is picked to a partly opened shoot, deliberately past the bud stage, because a bud has neither the surface nor the toughness that repeated shaking requires.

Mature leaf

Dark tea, some border-trade bricks and Japanese bancha use leaf that fine standards would reject, and the resulting teas are not failures of it.

Other steps at the Plucking stage

• Fresh-leaf reception and grading — The decision, taken at the factory door, about which intake becomes which product — and the point at which a day's leaf is split into separate lots that never meet again.
• Fresh-leaf transport and holding — The hours between the bush and the factory door, during which a packed bag of leaf can heat itself and start changing before anybody has decided what it should become.
• Hand plucking — Picking each shoot individually by hand, which is the only method that can choose what to take and what to leave.
• Leaf separation by hand (ban pian) — Breaking each freshly picked shoot apart by hand so that the individual leaves go forward and the bud and the stem are set aside.
• Mechanical harvesting — Cutting the top of the plucking table with a powered blade, which takes everything at a set height regardless of what is ready.
• Shading — Covering the bushes for days or weeks before plucking, which changes the leaf’s composition before it is ever picked.

Guides covering this step

• The plucking table, and the cycle that runs on it — The flat green surface across a tea field is an engineered object. Its height, density and evenness determine how the field is harvested, how often, by whom, and what proportion of what is picked is worth having.
• The bud, and why “one bud two leaves” is a botanical statement — Every plucking standard in tea is a sentence about where on a growing shoot the picker stopped. The reason the position matters is that a shoot is not uniform: it has a gradient running down it, and the standard is a decision about how far into that gradient to reach.
• Reading a wet leaf backwards to the process — The spent leaf in the bottom of the pot is the most honest document a tea comes with. Almost every processing decision leaves a mark on it, and reading those marks is a skill that takes an afternoon to start and rewards a lifetime.