Who this is for, and why the usual advice misfires
The storage pages in this catalogue, and most of the writing they draw on, were composed for households in temperate climates where indoor air is frequently drier than the tea would prefer and where the practical worry is a kitchen cupboard rather than a season. A great deal of the world’s tea is drunk somewhere else. In coastal southern China, Hong Kong, Taiwan, much of Southeast Asia, southern Japan in summer, the Indian monsoon belt, the Gulf coast of the United States and a Mediterranean summer, ambient humidity sits for months where a temperate storer would consider it a problem to be fixed. The advice does not merely need adjusting; several parts of it invert. Ventilation becomes a risk rather than a requirement. A desiccant stops being an optional refinement and becomes the main intervention for the fragile categories. And the ageing categories, which in a dry flat need an enclosure and a buffer and constant attention, largely look after themselves. Recognising which side of that line a household is on is the first decision, and the cheapest way to settle it is a hygrometer left in the room where the tea lives for a fortnight across a season, since indoor humidity is frequently quite different from the forecast and varies more between rooms of one house than people expect.
The fragile categories become the hard case
Green tea, matcha, unroasted oolong and fresh white tea have to be held near the dry end of their range, and in a humid climate every opening admits air carrying substantially more water than the leaf wants. The practical consequences are specific. Buy smaller quantities than a temperate household would, because the clock is faster and the reserve is at risk every time the container is opened. Decant into the smallest container that will hold the working stock and keep the reserve sealed and undisturbed. Put an indicating desiccant in with the preservation teas and regenerate or replace it, since in this climate it will fill. Open fragile teas in the driest room and the driest part of the day rather than in a kitchen at the height of humidity, which sounds fussy and is simply free. And take the tactile check seriously, since leaf that has softened is reporting a problem while it is still correctable by moving the tea somewhere better. Where a household has air conditioning, the room that is conditioned most consistently is usually the right store, and it is worth noticing that this is one of the few situations in which the coolest room and the driest room are the same room.
The ageing categories become easy, and then need watching
This is the climate the pu-erh trade grew up in, and the reason so much of the traditional practice reads as casual to a reader in a dry country. A cake in a cotton wrapper in a carton in a cupboard, in a subtropical city, is receiving broadly the conditions that a collector in a northern flat spends money to reproduce. No enclosure, no buffer, no humidifier. What replaces that work is attention in the other direction: the risk is now the upper end rather than the lower, and the failure is mould rather than stagnation. The practical measures are the mirror image of the temperate ones. Keep cakes off the floor and away from outside walls, both of which run colder and therefore damper. Keep some space around and between them so that air is not trapped against a surface. Watch the wettest weeks of the year rather than the average, since a store is judged by its worst fortnight. And separate anything that develops a musty smell immediately, because whatever produced it is a condition the neighbouring cakes are also in. A hygrometer is as useful here as anywhere and is being read for a different reason: not to see whether anything is happening, but to see how close the store has come to the edge.
Seasonal storage, and the practice of airing
A description of something people do now, compiled from published accounts rather than from practice.
In a monsoon or a distinctly wet-and-dry climate, storage is a seasonal activity rather than a steady state, and the traditions that developed in such places reflect that. The general shape of the practice, as it is described in the pu-erh and hei cha communities, is to keep a store closed through the wettest period and to open, inspect and air it during a dry spell — which uses the climate’s own dry season as the corrective rather than trying to hold a constant year-round. TeaHQ records this as a living practice compiled from published accounts rather than as a specification, and notes that the storers who describe it disagree with one another about frequency and duration. What is not in dispute is the underlying logic, which is that a store in a seasonal climate is exchanging with a room that is itself two different rooms at two times of year, and that an intervention timed to the right season costs nothing while the same intervention at the wrong time undoes it. A household that keeps tea in such a climate is therefore keeping a calendar as much as a cupboard, and the useful record to keep is not the age of the tea but what the store was doing each season.
Containers behave differently here
Two of the standard recommendations weaken. The advice not to wash a tin was written against the temperate hazard of trapping residual water, and it holds; what changes is that a tin opened in humid air is admitting water regardless, so the sealing quality of the closure matters more than it does in a dry country and a loose friction lid is a worse object here than there. Unglazed clay, a sensible brake in a moderate climate, is a poor choice for anything that is not meant to be ageing, because it will follow the room and the room is damp. Paper, card and cloth packaging follow the room quickly and will feel it: a cotton-wrapped cake takes up the season, which is the intention, and a paper bag of green tea does the same, which is not. Conversely the humble laminate pouch is doing more work here than in a dry house and is worth keeping rather than decanting. The general principle is unchanged and its weighting shifts: the barrier matters in proportion to the difference between what the tea wants and what the room is offering, and in a humid climate that difference is large for half the catalogue and near zero for the other half.
What travels badly between climates
A tea bought and stored in one climate and moved to another arrives at a new equilibrium, and the direction of the move decides whether that is a problem. A cake stored humid and moved to a dry flat will slow markedly, which is the frequent complaint that a tea seemed to stop developing after it was imported; it is not usually damage, and it is a change of trajectory the buyer did not choose. A cake stored dry and moved to a humid city will accelerate, sometimes faster than the owner expects. A green tea moved in either direction is only at risk from the transit itself. This is also why storage provenance is a real question when buying aged tea and why an honest seller describes a history rather than a location. For a household that has moved country, the first useful action is not to reorganise the collection but to measure the new rooms, since the arrangement that worked in the old house was tuned to a climate that is no longer there. Almost every storage mistake in this catalogue comes from applying a correct rule to the wrong conditions, and moving house is the commonest way to end up doing that without noticing.