What gets picked
White tea is graded by bud ratio, and the plucking standard is written almost entirely in those terms.
Silver Needle is a pure bud pluck, fat and downy, taken before the leaf has opened at all.
White Peony, or Bai Mu Dan, is 1 bud with 1 or 2 leaves just below it.
Gong Mei and Shou Mei drop further down the plant, with more open leaf and visible stem.
The more bud in the basket, the higher the grade, which makes the pluck a sorting job as much as a harvest.
Fat buds are preferred over thin ones, because a thin bud gives a flat cup however carefully it is made.
The down on the bud, called bai hao（白毫）, is the same word the category takes its name from.
Pickers are often paid by the bud rather than by weight, since speed and accuracy pull against each other.
A bud pluck is slow work, and a good picker manages a small fraction of a green tea harvest.
That labour, not the processing, is most of what a Silver Needle price is actually paying for.
Why the standard exists
White tea is made by withering alone, with no firing and no rolling to reshape the result.
So whatever is in the leaf when it is picked is what ends up in the cup, with nothing added.
Buds carry the sugars and amino acids that become the sweetness white tea is known for.
Open leaf has more fibre and less of that, which is why Shou Mei tastes grassier and less sweet.
There is no step in the process that can concentrate flavour, only steps that let water out.
Wilting moves that water out slowly, and the chemistry happening inside is largely the leaf’s own doing.
A thin or coarse pluck therefore cannot be rescued, because there is no stage that would rescue it.
This is why the standard is stricter here than in categories where heat and rolling do more work.
The bud is also structurally right for slow drying, since it loses water evenly rather than case hardening.
Pick the wrong material for white tea and the honesty of the process simply shows the mistake.
Grade follows the leaf
Grade in white tea is close to a direct count of buds, so the field decision is the grade.
A basket of pure buds makes Silver Needle, and anything less drops the tea down the ladder.
Broken buds and leaf fragments are the usual reason a lot is downgraded, not the making.
Colour matters too, because grey or dark buds point at leaf that was damaged or badly dried.
Grade also depends on cultivar, since a large bud variety gives a plumper and more even product.
Fuding and Zhenghe material is graded differently, and comparing the two by grade alone misleads.
Machine plucking is rare in white tea for exactly this reason, since it destroys the bud ratio.
A sheared lot can still be sold, but it will be Shou Mei or lower whatever the plant was.
Because grade is this visible, it is also the claim most often stretched on a printed label.
Read the bud ratio yourself rather than the grade, since one is countable and the other is not.
Season and timing
White tea is a spring harvest, and the best of it happens inside a window of 3 or 4 weeks.
Silver Needle is picked earliest, often from late March, while the buds are still tight.
Once the weather turns warm the buds open within days, and the window for a pure bud pluck closes.
After that the same bushes give White Peony, then Shou Mei, as the season moves along.
Autumn white tea exists but is coarser, and most of it goes into compressed cakes rather than loose.
There is a traditional list of conditions for not picking, sometimes called the 10 no picks.
It rules out rainy days, heavy dew, thin buds, purple buds and insect damaged leaf among others.
The logic is simple: wet leaf spoils in the basket, and weak leaf makes weak tea.
Pickers also stop during the hottest part of the day, when leaf wilts faster than it can be handled.
A short season and a narrow daily window are the two facts behind the price of white tea.