The pattern
Regional difference in white tea is real but narrow, and it takes a little attention to find.
Fuding, on the coast, gives a light sweet cup with a floral top note.
Zhenghe, inland and cooler, gives more body and a longer finish.
The two counties sit within a couple of hours of each other and share most of their weather.
What separates them is cultivar and the length of the wither rather than anything dramatic.
Jianyang and Songxi fill out the four counties, and most of their leaf goes into the lower grades.
Yunnan is the real outlier, and it makes a white tea that looks and tastes like nothing from Fujian.
Its leaf is broad leaf assamica, dark above and pale beneath, and the liquor runs deeper.
Calling that the same tea as a Fuding Silver Needle is the mistake most buyers make.
So the pattern has two layers, a small one inside Fujian and a large one outside it.
Learn the small one for pleasure and the large one so that you are not misled.
What drives it
Cultivar is the first driver here, and it divides the category more cleanly than geography manages to.
Fuding Da Bai（福鼎大白）is a large budded bush that carries the down Silver Needle is known for.
Zhenghe Da Bai（政和大白）makes a thicker liquor, and it suits the leafier grades better.
Yunnan works with assamica, a different subspecies with bigger leaves and far more colour.
Withering is the second driver, and it is where the maker has the most room to move.
A longer wither softens the grass and builds sweetness, and inland conditions make that easier to run.
Weather is the third driver, and it acts mostly through humidity and cloud.
Coastal fog slows the wither at Fuding, and the gardens behind the town climb to about 900 m.
Elevation shifts the picking date more than the flavour, and the high gardens start later in the spring.
Processing is deliberately minimal, which is why the raw material shows through so clearly.
With only withering and drying between the leaf and the cup, a maker has nowhere to hide.
Learning the map
Learn this map in three steps, and take them in this order.
First, separate Fujian from Yunnan, which is the one difference visible in the dry leaf.
A Fuding bud is small, silver and evenly covered in down, and a Yunnan one is large and dark.
Second, compare Fuding against Zhenghe at the same grade, which is where the subtle part lives.
Use Bai Mudan rather than Silver Needle, since the leafier grade carries the county more clearly.
Third, add age, because white tea is one of the few categories sold both fresh and stored.
Inside Fujian, the boundary matters less than the grade, and it is worth accepting that early.
A poor Fuding beating a good Zhenghe is a common result, and it surprises people who trust the map.
Outside Fujian, treat the region as a different product rather than as a cheaper version of the same one.
Yunnan white tea deserves to be judged on its own terms, and it is frequently good value.
Once those three steps are done the map stops being confusing and starts being useful.
Tasting across regions
Taste white tea across regions with a fixed leaf ratio and a lower water temperature than oolong wants.
Use 5 grams in a 100 ml vessel at about 85 °C, since boiling water scalds a bud tea.
Steep the first infusion for 30 seconds and hold the later ones to the same schedule.
Smell the dry leaf first, because Fuding’s down smells sweet while Yunnan’s smells faintly of hay.
In the cup Fuding is light and floral, Zhenghe is rounder, and Yunnan is darker and maltier.
Take each one through to the 4th infusion, where the floral notes have gone and only the body is left.
That is where Zhenghe pulls ahead of Fuding, and where Yunnan separates from both of them.
Check the wet leaf as well, since the spent bud tells you the cultivar straight away.
A Fuding bud stays pale and whole, whereas a Yunnan leaf shows a dark upper surface.
Do not bother with blind tests between the two Fujian counties until you have done it several times.
The difference is small enough that a single session proves nothing at all.