Kakadu plum
Terminalia ferdinandiana · Combretaceae · also known as Gubinge, Billygoat plum, Mador, Green plum
A small olive-green fruit from Australia's Top End holding the highest vitamin C ever recorded in a fruit — orders of magnitude beyond oranges. Harvested from wild trees by Aboriginal communities, it powers a growing Indigenous-led industry.
At a glance
- Taste
- Tart, green, and astringent — stewed apple and English gooseberry with a piney, herbal edge. More medicine-bright than dessert-sweet; usually met as powder or purée.
- Origin
- Northern Australia (Kakadu, Arnhem Land, the Kimberley)
- Grown in
- Australia
- Peak season
- Autumn, Winter
- Notable varieties
- Wild-harvested (no commercial cultivars yet)
Sensory & practical profile
Taste fingerprint
- Sweetness
- Tartness
- Aroma
- Juiciness
- Firmness
Approximate, at peak ripeness · 0–5
- Ripe when
- Pale yellow-green and slightly soft, dropping freely — though as a buyer you'll meet it frozen or powdered, already picked at peak.
- How to eat
- Stir a small spoon of the powder into smoothies or water (it's intensely tart), or use purée like sour apple in sauces and jams.
- Typical price
- Luxury
A single Kakadu plum can carry as much vitamin C as a whole bag of oranges — Aboriginal harvesters knew it as a traveling food and remedy long before a lab put a number on it.
When it's in season, by region
| Region | Peak months |
|---|---|
| Oceania | Mar–Jun harvest across the Top End and Kimberley, after the wet season |
How to select & store
Picking a ripe one
You'll rarely choose fresh fruit — nearly all supply is frozen whole, puréed, or freeze-dried powder. For powder, pale green-buff color and a sharp gooseberry smell indicate careful low-heat processing.
Storing it
Fresh fruit is a days-long proposition and almost never travels. Powder keeps a year airtight and cool; frozen purée keeps its famous vitamin C well — one reason the industry freezes on-country within hours.
Practical uses
🍽️ Culinary
- Freeze-dried powder stirred into smoothies, yogurts, and juices
- Purée in sauces, dressings, and desserts wherever a sour-apple note fits
- Jams and chutneys, often with sweeter fruit as ballast
- A natural preservative in some Australian food processing — its acidity and antioxidants do real work
🌿 Health & traditional
- Long used by Top End Aboriginal peoples as food and traditional remedy
- Modern cosmetic and supplement industries prize its vitamin C and ellagitannins
🎎 Cultural
- Gubinge harvest is a seasonal economy for Aboriginal communities in the Kimberley and Top End, with Indigenous enterprises leading supply
- A landmark case in protecting Indigenous knowledge — a US patent attempt on its cosmetic use was successfully challenged
Somewhere in the eucalyptus-scented savanna of Australia’s Top End grows the most vitamin-C-dense fruit ever measured. The Kakadu plum — gubinge in the Kimberley — looks like nothing: a thumb-sized, olive-green drupe with a big stone and thin, sharp flesh. The numbers are the spectacle: analyses report vitamin C from about 1,000 up to 5,300 mg per 100 g. An orange manages around 50.
From bush harvest to freeze-dryer
There are no Kakadu plum orchards to speak of — the fruit is picked from wild trees on Aboriginal land, largely by Aboriginal harvesters, then frozen or freeze-dried within hours to lock in the ascorbic acid. That supply chain makes it one of the world’s few fruits where buying the “processed” form is buying it fresh, and where provenance directly supports Indigenous enterprises.
What it’s actually like
Behind the statistics is a genuinely nice sour fruit: think English gooseberry stewed with green apple, plus a resinous bushland whisper. The powder is the everyday format — a small spoonful sharpens a smoothie like citric lightning. Chefs use the purée where cranberry or tamarind would go; the fruit’s polyphenols even earn it work as a natural preservative.
The knowledge question
Kakadu plum is also a landmark in who owns what: when a US cosmetics patent tried to fence in its use, Australian and Indigenous advocates fought it off. The fruit now stands, with quandong and Davidson plum, for a native-foods industry trying to grow on Aboriginal terms.
