Written by: Jessica Turner

Reviewed by: Ethan Cole  

XXL Autoflower Seeds: Fast, Big, Reliable

Want huge yields without waiting months? XXL autoflower seeds combine the massive harvest potential of photoperiod strains with the speed and simplicity of autos. They’re perfect for growers who want fast, reliable results and big returns. With quick flowering times, compact structure, and resilience to stress, XXL autos are a top pick for growers of all levels.

Top XXL Yield Cannabis Strains to Grow in Australia

From fruity hybrids to classic powerhouses, our selection includes the best XXL strains from trusted breeders around the world – all ready to ship fast and discreetly to Australia.

• Critical XXL: A true yield machine that combines speed, stability, and bulk. This classic Critical Skunk descendent is bred for size, offering up to 800 g/plant outdoors and delivering dense, aromatic buds with minimal fuss.
• Big Bud XXL: A reimagining of the legendary Big Bud, taken to XXL proportions. Expect enormous central colas, impressive outdoor yields of up to 900 g/plant, and solid resistance – a dream for growers chasing maximum output.
• BCN Critical XXL: A powerhouse cross between Critical+ and Big Bud, designed for growers who want serious production. Fast-flowering, resin-packed, and incredibly productive – ideal for both commercial and home setups.
• Auto AK XXL: This autoflowering beast blends the punch of AK-47 with XXL potential. With a short cycle and yields reaching 600 g/m², it’s perfect for those who want fast, heavy harvests without sacrificing potency.
• Somango XXL: Fruity, relaxing, and surprisingly productive. This Indica-leaning strain offers lush mango flavour and delivers outdoor yields of up to 750 g/plant – a flavour-packed option with real muscle behind it.
• BCN Critical XXL Autoflower: A true auto yield champion – this strain delivers over 600 g/m² indoors in just 10–11 weeks from seed to harvest. Its heritage combines Critical+ and Kritikal Bilbo with Critical Mass Auto, resulting in compact, sturdy plants loaded with dense, frosty buds and a sticky citrus-skunk aroma. With around 22% THC, it offers a powerful, balanced high that’s both uplifting and relaxing – all wrapped in a forgiving, resilient auto format perfect for growers of all.

Why Aussie Growers Choose Herbies

At Herbies, we make it easy for Australian growers to get their hands on top-performing, high-yielding cannabis strains. Here's why we're a go-to seed source down under:

• A curated range of XXL seeds from global breeders
• Stealth packaging on all Australian orders
• Free seeds with every purchase
• Secure payment options (cards or bank transfer)
• Guaranteed delivery and helpful customer service

Ready to grow bigger, faster, and smarter? Dive into our XXL selection and bring home a harvest to remember.