What is Queen Garnet Plum? Australia's #1 Antioxidant Superfruit

The Queen Garnet is a deep-purple plum variety developed in Australia, particularly rich in anthocyanins – a type of flavonoid with potent antioxidant properties. Its vivid colour runs right through to the flesh, which is a reliable indicator of its extraordinary polyphenol content.

But here's a number worth stopping for: the Queen Garnet plum contains up to 277 mg of anthocyanins per 100g of fruit. 

That's not a small gap. It's the kind of figure that makes nutritional researchers pay attention, and at multiple Australian universities, they have.

The catch is, fresh Queen Garnet plums are a seasonal fruit. But we’ve made year-round access possible through freeze-dried supplementation, so the benefits don't have to disappear when the season does.

What is the Queen Garnet Plum?

The Queen Garnet plum has a genuinely interesting origin story – and it wasn't actually planned.

The Queen Garnet was bred by plant breeders at the Queensland Government's Department of Agriculture and Fisheries as a result of cross-breeding in 1997, not genetic modification. 

Researchers were trying to develop a disease-resistant Japanese plum (Prunus salicina) when they cut into the fruit and found something unexpected: deep red flesh, running all the way through. That colour was the telltale sign of extraordinary anthocyanin levels, and a high-antioxidant superfruit was born.

What makes the Queen Garnet plum tree distinct is that it was selected specifically for nutrient density, not just sweetness or yield. When grown and harvested properly, the Queen Garnet has higher nutrient density, higher anthocyanin levels, and (we think) a better flavour profile than other plums. 

The anthocyanin content continues to build the longer the fruit hangs on the tree, so it must be harvested at peak ripeness to capture its full nutritional potential.

Visually, the Queen Garnet plum is easy to recognise. When ripe or overripe, it has near-black skin and a deep red flesh colour, which together result in exceptionally high anthocyanin content. The taste sits somewhere between a Blood Plum and a Sugar Plum – firm, sweet, and slightly tart at the skin.

Queen Garnet plums are in season from late January until the beginning of April, and are grown in all states around Australia. 

Why is Queen Garnet Called an Antioxidant Superfruit?

The term "superfruit" gets thrown around a lot. With the Queen Garnet plum, it's genuinely earned.

The key compound is anthocyanins, a class of natural plant pigments belonging to the flavonoid family. They're what give blueberries their blue, pomegranates their red, and Queen Garnet its almost-black skin and crimson flesh. Beyond colour, anthocyanins are studied extensively for their antioxidant and anti-inflammatory properties.

Most fruits carry anthocyanins in their skin only. What sets the Queen Garnet plum apart is that the pigment extends throughout the flesh, not just the skin, making it an exceptionally concentrated whole-fruit source of these compounds.

Queen Garnet has anthocyanin content 3 to 20 times higher than commercial plum cultivars currently available – matched only by a few berries. According to independent analysis, Queen Garnet plums also rival elderberries and aronia berries as a source of anthocyanins. 

Alongside anthocyanins, Queen Garnet plums are also a source of polyphenols, natural flavonoids, vitamin C, potassium, and dietary fibre – a combination that researchers believe works synergistically within the body.

Queen Garnet Plum Nutrition Profile

Per 100g of fresh Queen Garnet plum (approximate):

Nutrient	Amount
Calories	~45–50 kcal
Dietary fibre	Good source
Vitamin C	Present
Potassium	Present
Anthocyanins	Up to 277 mg
Total polyphenols	High
Artificial additives	None

Exact values vary by season and growing conditions. Always check PurQ’s product-specific labelling.

Queen Garnet Plum Health Benefits: What the Research Shows

Researchers across the University of Queensland, Victoria University, the University of Wollongong, and the University of Southern Queensland have actively studied the Queen Garnet plum. Here's what the science currently points to.

Gut Health Support

Research at UQ's Queensland Alliance for Agriculture and Food Innovation is exploring how Queen Garnet anthocyanins are absorbed and how they connect to the gut and brain nexus, specifically studying colon microbiota and its role in converting anthocyanins into smaller compounds known to have benefits for cognitive function. 

For those wanting to actively support their gut, PurQ Gut Care Powder pairs freeze-dried Queen Garnet with Lactospore Bacillus Coagulans and three prebiotic fibres – Baobab, Chicory Root, and Green Banana – for a daily gut ritual that goes beyond the fruit alone.

Anti-Inflammatory Properties

Research from the University of Southern Queensland found that consumption of anthocyanins from Queen Garnet's nectar significantly reduced the effects of Inflammatory Bowel Disease in rats. Researchers attributed this to the known anti-inflammatory responses of the plum's properties, which are also shown to reverse inflammation of the heart and liver, as well as blood pressure and fat levels in obese and hypertensive rats. 

Cardiovascular Support

A randomised, double-blind, placebo-controlled trial found that Queen Garnet plum juice supplementation inhibited platelet aggregation and demonstrated favourable effects on coagulation parameters, suggesting potential for cardiovascular disease risk reduction and a role as a complementary anti-platelet nutritional therapy in pro-thrombotic populations. 

Cognitive Health and Brain Function

Scientists are also investigating Queen Garnet plum for its potential to delay or prevent dementia. Early-stage findings by Victoria University's Professor Michael Mathai indicate that plum extract may reduce inflammation markers and enhance the formation of new neuronal connections, potentially aiding memory formation. 

Professor Yasmina Sultanbawa at UQ's Queensland Alliance of Agriculture and Food Innovation is specifically focused on connecting the plum's antioxidant properties to conditions like dementia, where those properties may minimise DNA damage, calling it "a very interesting piece of work."

Recovery and Sleep Support

Antioxidants play an important role in overnight cellular repair, helping neutralise free radicals that accumulate throughout the day. Queen Garnet's polyphenol density makes it a natural fit for evening wellness routines. 

PurQ Night Time Restore pairs Queen Garnet with Sour Cherry, Chamomile, and Kiwifruit for nightly restoration, a thoughtfully formulated blend designed to work with your body's natural overnight recovery processes.

How Does Queen Garnet Compare to Other Superfruits?

Here's how the Queen Garnet plum stacks up against some of the most commonly marketed antioxidant fruits:

Fruit	Anthocyanins (mg/100g)	Australian-Grown	Research Base
Queen Garnet Plum	Up to 277 mg	Yes – exclusively	UQ, Victoria University, USQ, UOW
Blueberry	~163 mg (varies widely)	Available locally	Extensive global research
Acai	Highly variable (product dependent)	No – imported	Mostly industry-backed
Pomegranate	~15–30 mg	Limited	Moderate research
Regular Plum	5–173 mg	Yes	Limited

A few things stand out. Queen Garnet's anthocyanin content rivals some of the world's most celebrated berries, and it's exclusively Australian-grown, with a dedicated scientific research program behind it. Acai, by comparison, is imported, highly processed, and its anthocyanin content varies dramatically depending on the product form.

The other key difference: Queen Garnet is a cultivar-specific fruit, bred and researched as a distinct variety. Most generic fruit powders blend multiple origins and varieties – making it harder to connect them to specific research outcomes.

Where Can You Buy Queen Garnet Plum in Australia?

In Australia, fresh Queen Garnet plums are available at Woolworths and Coles supermarkets and other leading independent fruit and vegetable retailers while in season, from late January to early April. Stock varies by store and region – they tend to sell fast once regulars know they're in. 

Outside major supermarkets, specialty greengrocers and fresh produce markets in Queensland tend to have the most reliable supply.

• Outside of season: Once April arrives, fresh Queen Garnet plums are gone until next summer. That's the honest reality of a fruit with such a short and specific harvest window.

• Year-round: For consistent, daily access without the seasonal hunt, PurQ delivers freeze-dried Queen Garnet sachets straight to your door – harvested at peak ripeness to preserve the fruit's natural anthocyanin content.

Queen Garnet, Year-Round

Queen Garnet plum stands out for three clear reasons: it's Australian-grown, backed by genuine academic research, and one of the most anthocyanin-dense fruits on the planet. Not much else ticks all three.

The challenge has always been access. A fruit with a six-to-eight-week season doesn't lend itself to building a consistent wellness habit. That's the problem we set out to solve – making Queen Garnet an everyday ritual, not an occasional treat.

Explore PurQ's Queen Garnet range and find the ritual that fits your day.

Frequently Asked Questions