Australia's Best Autoflowering Seeds to Grow Outdoors

A creative image of the map of Australia

Australia is an enormous landmass with a number of microclimates from the snowy mountains of Tasmania to the tropical jungle on the north coast. Growers of cannabis and other crops are concentrated mainly on the coast as inland is mainly arid desert.

Australia offers a unique environment to grow autoflowers

Certain areas of the continent, such as Sydney, enjoy a beautiful Mediterranean-style climate all year round, averaging 340 sunny days a year. However, rainfall is scarce, so you'll need to ensure your plants are well-watered.

However, the temperature of these regions is almost perfect for growing cannabis – with average highs of 26℃ and a balmy low of 16℃.

Other areas of Australia, such as Cairns, experience tropical weather with hot and sticky summers and mild, dry winters.

Not only do these locations feature excellent temperatures for optimal cannabis growth – an average high of 31℃ with an average low of 18℃ – they also receive plenty of rainfall.

Why autoflowers are ideal for the Australian climate

Autoflowers, with their short growing season, are ideal for cultivation in Australia as it is easily possible to enjoy multiple harvests each year.

Bountiful sunshine allows autos to flourish and reap rich rewards, so if you are lucky enough to live Down Under, you might as well take advantage of the latest generation of high-quality auto flowers seeds.

Top 5 Autoflowering Seeds Australia 

1. Gorilla Glue Auto

Gorilla Glue Auto from WeedSeedsExpress grown by Master_weeda and smoking_hills9 on Growdiaries

Gorilla Glue Auto has earned its stripes as a favorite among Aussie growers, and for good reason. This Sativa-Indica hybrid is as tough as they come—vigorous, easy to grow, and a heavy-yielder to boot.

Expect a medium-sized, bushy plant dripping with resin, producing dense, compact buds not just on the main stem but all over its branches. The flavor? Pure bliss. Think zesty lemon and pine with a touch of sweet fruit and a Diesel kick for good measure.

The effects hit just right—a smooth blend of cerebral and physical that sticks around for a while. Whether you’re soaking up the sun in Sydney or chilling on the Gold Coast, Gorilla Glue Auto is the perfect companion for Australia’s epic outdoors.

2. Bruce Banner Auto

Bruce Banner Auto from WeedSeedsExpress grown by Mosquito_Haarlem_Holland on Growdiaries

Bruce Banner Auto is not for the faint of heart—or the inexperienced grower. With THC levels soaring up to 25%, this mostly Sativa autoflower brings some serious punch to the table.

Outdoors, it thrives in the Aussie sun, delivering dense, resin-packed buds in just eight weeks. Pro tip: give it a little extra fertilizer love, and you could be looking at outdoor yields of up to 600g per m².

The flavor profile is as bold as its name suggests—sweet berries meet juicy citrus with a hint of diesel for good measure. The effects? Pure euphoria and energy, making it the ultimate daytime strain for those ready to Hulk out in style.

3. Blue Dream Auto

Bruce Banner Auto from WeedSeedsExpress grown by Kendog420 and JohnnyBlaze on Growdiaries

Blue Dream Auto is the perfect mix of beauty and brawn for Australian growers. This hybrid stunner flaunts striking purple hues and thrives under the Aussie sun, whether in a backyard, greenhouse, or even a temperate coastal climate.

It’s a breeze to grow, offering a taste of the feminized version’s magic in Autoflowering form. The flavor is a sensory delight—zesty citrus and woody cedar with sweet fruit and Haze undertones. 

Its clear, cerebral high is long-lasting and social, making it a favorite for anyone chasing quality and vibes. Blue Dream Auto isn’t just a strain; it’s an outdoor adventure waiting to happen.

4. Critical Purple Auto

Critical Purple Auto from WeedSeedsExpress grown by Mother on Growdiaries

Critical Purple Auto is a standout choice for Australian growers looking for beauty and bountiful buds. With THC levels reaching up to 25%, this Autoflower lives up to its name, delivering dense, purple-hued flowers that are as striking as they are potent.

While it takes a bit longer to flower—up to 94 days—the wait is well worth it. Outdoors, you can expect yields of around 350g per plant, making it a rewarding grow for those with a little patience.

Its flavor profile is an earthy-sweet mix with woody undertones that will keep you coming back for more. Critical Purple Auto is a true crowd-pleaser for Aussie gardens.

5. Zkittlez Auto

Zkittlez Auto from WeedSeedsExpress grown by Danger90946 and Mosquito_Haarlem_Holland on Growdiaries

Zkittlez Auto is the ultimate treat for Australian growers craving flavor and flair. This Indica-dominant hybrid is a visual and aromatic delight, producing candy-scented colas with fruity aromas of berries and sweetness that evolve as it cures.

Outdoors, it wraps up its rapid growth cycle in just 70 days, yielding around 300g per plant. Its effects strike the perfect balance between relaxing and cerebral, making it a crowd-pleaser.

With its vibrant lineage of Afghan Kush, Granddaddy Purple, and Grapefruit, Zkittlez Auto brings a whole new meaning to growing something sweet under the Aussie sun.