Country
Laos
Laos sits on the same mountain uplift as Yunnan's tea forests and grows the same plant from the same old seed stock, with none of the reputation. Phongsaly, in the far north, has stands of large old assamica that upland villages have harvested for generations. Most of what those trees produce leaves the country as raw material and is finished, pressed and sold under somebody else's name.
What grows here
Sun-dried green tea off old trees, which is the material puerh is made from, is what the north actually produces. Phongsaly is the name attached to it, with Luang Namtha, Oudomxay, Houaphanh and Xieng Khouang holding tree populations of their own. In the south, the Bolaven plateau carries planted gardens rather than forest trees, some of them dating from French colonial plantings around Paksong and some much newer, making green and rolled oolong on borrowed technique. Pickled tea for eating, which Laos and northern Thailand both call miang, is made in the northern hills as well.
The ground
Steep monsoon-forest ridges in the far north, broadly 1,000 to 1,600 m, on the southern edge of the same uplift that carries Xishuangbanna and Shan State. The trees are not in rows. They stand in and around villages and in secondary forest, on ground that has been harvested rather than farmed, so a Lao tea garden looks closer to an orchard than to a plantation. The Bolaven plateau in the south is different ground entirely: basalt at around 1,200 m, planted deliberately and in rows.
The bushes
Seed-grown local assamica, old, variable and unnamed, which is the same answer Yunnan gives for its own forest material. There is no cultivar vocabulary here because nothing was bred. What stands in a Phongsaly village is a population, and the tree-to-tree variation inside one stand is part of what a buyer is getting. The Bolaven plantings are a separate story on introduced planting material.
Harvest seasons
Spring, from roughly March into April, is the picking that matters, for the same reasons it does across the border. Autumn material is made and is cheaper. Yields off old trees are small, and the limit on a village's output is usually how much leaf it can process by hand rather than how much is on the trees.
How it is made here
The northern method is Yunnan's: fixing in a wok, hand rolling, then drying in the sun rather than by machine. The sun drying is the point, because it leaves the leaf able to keep changing in storage in a way oven drying does not. Read the classification carefully. Loose leaf made this way is sun-dried green material, mao cha, not a fermented tea. Steam and press it and it is a sheng cake, and the pressing is usually done somewhere else.
What to look for
Lao leaf routinely crosses into China and is pressed into cakes sold as Yunnan tea, which is why an honestly labelled Lao cake tends to be good value and why some cheap Yunnan is not what it says it is. Ban Komaen in Phongsaly is the village whose old trees get cited most, so more tea claims the name than the village makes. Tree-age numbers here are as unverifiable as they are anywhere. And keep pickled tea and brewing tea apart: they come off the same trees and are not the same product.
How it got here
Upland communities in northern Laos have harvested tea from forest trees for a very long time, and the plantings around Phongsaly were tended by villages rather than laid out by a company. The French colonial period built the Bolaven plateau's plantation agriculture, mostly around coffee, though tea went in there too. What changed Laos was Chinese demand: the puerh boom from the 2000s put a value on old-tree material and pulled Lao leaf into a cross-border trade it had never been part of at that scale.