How to make jun

What makes jun jun

Jun is a tea ferment that runs on green tea and honey instead of black tea and cane sugar, driven by its own distinct culture. It looks like kombucha in the jar — same rubbery pellicle at the surface, same cloudy liquid — and the finished drink is lighter, more floral and less sharp.

Three substitutions is the whole difference, and every one of them matters. The tea has to be green. The sweetener has to be honey. And the culture has to be a jun culture, because a kombucha SCOBY fed honey does not become one — honey is antimicrobial, a culture selected for cane sugar handles it badly, and what you get is a weakened kombucha culture rather than jun.

If you have brewed kombucha, essentially everything else transfers: the same jar, the same cloth cover, the same band, the same bottles, the same second ferment. This is not a new hobby. It is the one you already have with a different feedstock and a shorter clock.

What you need

Nothing here is exotic, and if you already brew kombucha you own most of it.

• A jun culture with measured starter tea. The part that cannot be improvised or converted. Buy from whoever publishes the starter volume in fluid ounces — buying a jun SCOBY covers what should be in the box.
• Green tea, loose leaf. A named green works better than a blend here because you can repeat it. Gunpowder green is the style the culture sellers point at.
• Raw honey, and a fair amount of it. Roughly a cup per gallon, which is the same volume kombucha takes in sugar. This is the expensive part of jun.
• A gallon vessel, a cloth cover and a band. Identical to kombucha. A tap is a genuine advantage here because jun moves fast and you will be tasting often.
• Pressure-rated bottles. Jun carbonates readily, and a published pressure rating matters as much as it does for kombucha.

What you do not need is a separate set of anything. Running jun alongside kombucha means two jars and two labels, not two kitchens.

The inputs, against kombucha

The starter figure is worth pausing on because it is the one number in this table somebody published rather than a working rule. A jun culture sold for a gallon ships with twelve fluid ounces of mature starter tea, which against 128 oz is 9.4 percent — landing almost exactly on the ten percent rule the same maker publishes for its kombucha cultures. The instruction and the quantity in the box agree, which is rarer than it should be.

The picks

The three things that make it jun

The culture, the leaf and the honey. Everything else on this page is equipment you probably already own, and none of it is jun-specific.

Fermentaholics

Jun Kombucha Starter Culture, 12 fl oz

A jun pellicle with twelve fluid ounces of pre-measured mature starter tea — the culture on its own, for anyone who already owns a gallon jar.

$17.99 · View on Amazon

#ad Price as of October 18, 2026. How this is funded.

Fermentaholics

Organic Gunpowder Green Tea, 4 oz

A named single-style green — gunpowder — rather than an anonymous blend, and the one tea here the maker points at jun specifically.

$9.99 · View on Amazon

#ad Price as of October 18, 2026. How this is funded.

Nate's Honey

100% Pure, Raw & Unfiltered Honey, 32 oz

Raw, unfiltered, single-ingredient honey in a squeeze bottle — the cheapest honest way to feed a jun batch, and the maker states exactly what it did to it.

$14.47 · View on Amazon

#ad Price as of October 18, 2026. How this is funded.

The method, in order

A gallon batch is about twenty minutes of work, most of which is waiting for tea to cool.

Brew the green tea strong — roughly two tablespoons of loose leaf per gallon — and let it steep properly. This is a feedstock, not a delicate cup, so a hard steep is correct. Then take the leaf out.

Now cool it completely before the honey goes anywhere near it. This is the step that separates jun from kombucha procedurally, and it is the one people get wrong. Sugar dissolves happily in hot water and nothing is lost. Honey does not benefit from heat, and pouring it into hot tea drives off exactly the volatile character you are paying for. Cool first, then stir the honey in until it is fully dispersed — honey settles, and a layer of it sitting on the bottom of the jar is not feeding anything.

With the sweetened tea at room temperature, add the culture and all of its starter tea. The starter is the part that acidifies the batch immediately and protects it through the first days, the same as in a kombucha batch. Cover with a tight-woven cloth and a band — never a lid, because this stage is aerobic and must not build pressure.

Then leave it somewhere cool and stable and start tasting on day three.

Honey: raw or not, and how much

The honey question generates more argument than anything else in jun, and the honest position is narrower than either camp claims.

Raw, unfiltered honey is what jun cultures are adapted to and what almost every seller assumes. It is also a live product with genuine antimicrobial activity and its own microbial population, which means a young or stressed culture is the fragile party in that relationship. Established cultures handle it without difficulty; a culture on its first or second batch is less robust.

Pasteurized honey works and is more predictable, at the cost of the character that made you want jun rather than kombucha. It is a reasonable way to build a new culture up over two batches before switching.

On quantity, roughly a cup per gallon is the working figure — the same volume kombucha takes in sugar. Jun batches are more sensitive to honey quality than kombucha batches are to sugar quality, for the simple reason that plain white sugar is inert and honey is not. One ingredient on the label, and no added syrup, is the thing actually worth checking.

Timing, and why jun catches people out

Jun ferments faster than kombucha and it does so at a lower temperature. Both halves of that sentence cause problems for people arriving from kombucha.

The speed means a schedule calibrated to a fortnight will overshoot badly. Taste from day three, and expect to be bottling in under a week rather than after two. A jun batch left for a kombucha-length ferment does not fail — it simply goes sharp and loses the floral quality that is the entire reason to brew jun.

The cooler working range is the upside and the reason a lot of people switch. Kombucha wants roughly 75 to 85 F and a great many kitchens never get there; the temperature page covers what a cold room does to a batch. Jun is comfortable below that band, which makes it the realistic ferment for a house that would otherwise need a heat mat and a controller.

Nobody publishes a precise jun temperature band, and this page is not going to invent one. What is consistent across sellers is the direction: cooler than kombucha, faster than kombucha. Put a strip thermometer on the glass and learn what your own kitchen does, because that is the only figure that will actually be true.

The second ferment

Identical to kombucha in mechanism and worth doing, because jun takes fruit beautifully.

Draw the finished jun off into pressure-rated bottles, add a small amount of fruit or juice, seal, and leave at room temperature for a day or two before refrigerating. The second fermentation guide covers the method and the quantities; nothing about it changes for jun.

Two adjustments are worth making. Jun carbonates readily, so check earlier than you would with kombucha — a day sooner is a reasonable default. And go lighter on the fruit than you would with kombucha: jun's appeal is the honey and green tea character, and a heavy fruit addition buries exactly what you paid for.

What goes wrong that never happens with kombucha

• A sluggish first batch on raw honey. The commonest jun-specific complaint. A newly arrived culture meeting a strongly antimicrobial honey can take a batch or two to establish. Build it up rather than concluding the culture is dead.
• Honey settled on the bottom. Sugar dissolves and stays dissolved; honey does not disperse on its own. A sweet layer under the culture is feeding nothing and skews everything you taste. Stir it in properly at the start.
• Overshooting the window. Jun on a kombucha schedule goes sharp. This is a timing error rather than a fault, and the same rescue options apply — cut it, second-ferment it with fruit, or keep it as strong starter.
• A culture stored on the wrong feedstock. A jun culture parked in a kombucha hotel is being fed black tea and sugar and will drift. Keep the surplus in its own jar of strong finished jun, and label it.

What does not change is the thing that would actually ruin a batch. Dry, fuzzy growth on the surface in white, green, blue or black is mold, and the rule is the same as for kombucha: the batch and the culture both go. Brown stringy strands hanging off the pellicle are yeast and are entirely normal.

What jun costs to keep running

Worth being straight about, because it is the one genuine drawback and it compounds weekly.

The culture is a one-time purchase that reproduces, exactly like a kombucha SCOBY, and the tea is trivial — a four-ounce bag of gunpowder green is published at eleven gallons. The recurring cost is honey, at roughly a cup per gallon, and honey is meaningfully more expensive than cane sugar.

That makes jun the costliest reusable-culture ferment covered on this site to run, even though the equipment is identical to kombucha's. It is not a large amount of money in absolute terms, but anyone weighing whether home brewing repays itself should put honey in the recurring column rather than assuming jun and kombucha cost the same to run.