How to Grow Fat Bastard Autoflower
Fat Bastard Auto is a huge-yielding, exceptionally potent, perfectly balanced autoflowering strain that crosses Goldmember and Monkey Spunk with a ruderalis. It is a 50/50 hybrid with an enormous 30-38% THC, a fruity, skunky flavor, and a euphoric, powerful, relaxed effect. One of the strongest autos around, it brings serious potency to a fast, easy grow.
As an autoflowering strain, Fat Bastard Auto flowers automatically with age rather than waiting on a change in the light cycle, so there is no need to switch it to shorter days. You simply give it long days from start to finish and it starts flowering on its own after a few weeks, running its whole life cycle in about 8 to 10 weeks from seed to harvest. That speed and simplicity are exactly what make autos so easy to grow.
Recommended Strains
Fat Bastard Auto
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THC | 30% - 38% (High) |
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Type | Autoflowering |
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Yield | High |
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Phenotype | 50% Indica / 50% Sativa |
Fat Bastard Auto HMC Edition
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THC | 30% - 38% (High) |
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Type | Autoflowering |
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Yield | High |
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Phenotype | 50% Indica / 50% Sativa |
Potent, productive and beginner-friendly, Fat Bastard Auto is a rewarding auto to grow. You can see the full genetics and buy Fat Bastard Auto seeds on the strain page, and browse the rest of our autoflowering seeds alongside it.
Strain Profile at a Glance
| THC | High (30-38%) |
|---|---|
| Lineage | Goldmember x Monkey Spunk x Ruderalis |
| Type | Autoflowering |
| Genetics | 50% Indica / 50% Sativa |
| Climate | Temperate |
| Life cycle | 8-10 weeks seed to harvest |
| Harvest (outdoor) | All season |
| Height | 4.92 ft / 1.5 m |
| Yield indoor | 1.31-1.97 oz/ft² (400-600 g/m²) |
| Yield outdoor | 4.41-10.58 oz/plant (125-300 g/plant) |
| Grow difficulty | Easy, beginner-friendly |
| Flavors | Fruity, Skunk |
| Effects | Euphoric, Powerful, Relaxed |
Promos & Deals
Growing an Autoflowering Strain
Fat Bastard Auto flowers on its own schedule, starting to bloom a few weeks after it sprouts no matter how long the days are. That means you keep it under long light the whole way through, typically 18 hours on and 6 off, or even 20/4, from seedling right to harvest; there is no switch to a shorter day to trigger flowering. The trade-off is that you cannot delay flowering to grow the plant bigger first, so every week of healthy early growth counts.
Because autos grow fast and do not like having their roots disturbed, start Fat Bastard Auto in its final pot rather than transplanting it. Sow the seed straight into the container it will finish in, go easy on the feed while it is young, and let it establish without a check. With a short life cycle of around 8 to 10 weeks from seed to harvest, a smooth start is the single biggest thing you can do for a strong, even finish.
Climate and Where to Grow It
Fat Bastard Auto suits a temperate climate and, like most autos, it is flexible about when you plant it. Because it flowers on age rather than on the season, you can run it at almost any time where the weather is warm enough, which is why its harvest window is listed as all season; outdoors you can even fit in more than one cycle in a long, warm year. At a medium 1.5 m it slips easily into a tent or a sunny spot.
Its yield is high for an auto, around 400-600 g/m² indoors in an optimized setup and 125-300 g per plant outdoors on its short cycle, so it is a strong producer under lights. As a balanced 50/50 hybrid it is easy to grow and forgiving, and its enormous 30-38% THC makes it one of the most potent plants among our high-THC seeds. If you prefer a photoperiod version, the same genetics are also available as a feminized Fat Bastard.
Its character comes from its parents, Goldmember and Monkey Spunk, crossed with a ruderalis to make it autoflowering, a combination that gives it a fruity, skunky punch and serious resin. Keep temperatures around 68-80°F (20-27°C) and humidity sensible through flowering, easing it down as the dense, resinous buds fill out, and keep steady airflow through the canopy so those chunky colas ripen clean.
Feeding Schedule (EC Guide)
Fat Bastard Auto is a resinous, productive auto, but autos want a lighter hand than photoperiod plants, so keep the feed modest and build slowly. Start very light, raise it gently as the plant grows, push a little more phosphorus and potassium through flower, then flush at the end so the fruity, skunky notes come through clean. The ranges below are a starting guide; adjust to your water and medium.
| Stage | EC (mS/cm) | Notes |
|---|---|---|
| Seedling | 0.4-0.6 | Very light feed while roots establish in the final pot |
| Early growth | 0.8-1.2 | Raise nitrogen gently as the plant builds size |
| Early flower | 1.2-1.4 | Shift toward bloom nutrients (P and K) |
| Full flower | 1.4-1.6 | Peak bloom feed while the buds swell |
| Flush | 0.0-0.4 | Plain water for the final 1-2 weeks |
Flowering and Harvest
Fat Bastard Auto starts flowering a few weeks from sprouting and runs its whole cycle in about 8 to 10 weeks from seed to harvest, with no change in the light cycle needed. It fills out with dense, chunky, trichome-smothered buds on a medium frame, developing a fruity, skunky aroma as it ripens. That heavy frost is a clear sign of the serious potency this strain is famous for.
Yields are high for an auto at around 400-600 g/m² indoors and 125-300 g per plant outdoors on its short cycle. Keep the colas supported and the canopy open so the lower buds get light, feed it lightly through flower, and harvest when most of the trichomes have turned cloudy with a few amber for the fullest fruity, skunky flavor and the most rounded, powerful effect.
Drying and Curing
Dry whole plants or branches in a dark room at around 60°F (15-18°C) and 55-60% humidity for 7-14 days, until the thin stems snap rather than bend. A slow, even dry matters with such dense, resinous buds, because they can stay damp in the middle while the outside dries, and a gentle dry protects the fruity, skunky aroma that defines the strain.
Then cure the trimmed buds in sealed jars, burping them daily for the first week and letting them settle for three to four weeks. A proper cure is what brings out the fruity and skunky notes and smooths the smoke, turning a freshly dried auto harvest into the rich, pungent, potent result Fat Bastard is known for.
What to Do With Your Trim
Don’t bin the sugar leaves you remove while manicuring. Fat Bastard Auto is a very resinous, frosty plant, so its trim is excellent for dry sift, bubble hash or rosin. That heavy resin and fruity, skunky aroma make the trim genuinely valuable, turning offcuts into a potent, flavorful concentrate run rather than waste, a real bonus with such an extremely high-THC auto.
Flavor and Terpenes
Fat Bastard Auto leads with a fruity, skunky flavor, a sweet, ripe fruitiness wrapped in a bold, pungent skunk funk. It is a loud, full-bodied smoke, and a good cure brings that fruity-and-skunky character forward in the jar and on the inhale, with the skunk giving it a classic, old-school punch.
Its terpene profile shapes that flavor. Myrcene forms an earthy, fruity base, while caryophyllene adds a peppery, spicy bite that underlines the skunk. Humulene brings a hoppy, earthy note that rounds out the funk. Together these three terpenes give Fat Bastard Auto its bold, fruity, skunky character and its heavy, savory depth.
Effects and Best Use
With its enormous 30-38% THC and balanced 50/50 make-up, Fat Bastard Auto delivers an exceptionally powerful, well-rounded experience. It is reported as euphoric, powerful and relaxed, pairing a bright, uplifting head with a deep, comfortable body. Its potency is genuinely extreme, among the highest of any auto, so a very small dose goes a long way, especially for newer or lighter smokers.
That euphoric, powerful, relaxed profile makes it a rewarding strain for a serious, full-bodied experience alongside its fruity, skunky flavor. The combination of a fast, high-yielding auto grow, exceptional potency and a bold, classic taste is exactly why this Fat Bastard autoflower stands out.
Common Problems and Pro Tips
Fat Bastard Auto is forgiving, but autos reward a careful start. Sow it straight into its final pot to avoid a transplant check, go light on the nutrients while it is young, and do any training early and gently, because once an auto starts flowering it will not recover lost time. Stick to low-stress training only, and only while the plant is still growing.
At a medium 1.5 m it is easy to manage, so the main jobs are a smooth start, strong light and keeping the air moving around its dense, resinous colas. Those tight, frosty buds can trap moisture, so hold humidity sensible through flower and defoliate a few of the largest fan leaves so light reaches the lower buds and the heavy colas stay well ventilated.
As a pro tip, respect the extreme potency and make the most of the resin: keep the feed modest, protect the terpenes with a proper plain-water flush and a full three to four week cure, and save the frosty trim for concentrates. Harvest when most trichomes are cloudy with a few amber for a rich, fruity, skunky result, and dose the finished flower with real care given its very high THC.
FAQ
Is Fat Bastard Auto an autoflowering strain?
Yes. Fat Bastard Auto flowers automatically with age rather than on a change in the light cycle, so you keep it under long days, usually 18/6 or 20/4, from seedling to harvest. It starts flowering on its own a few weeks after sprouting and runs its whole life cycle in about 8 to 10 weeks from seed to harvest, which makes it fast and simple to grow.
Should I transplant Fat Bastard Auto?
No. Autos grow fast and do not like having their roots disturbed, so start Fat Bastard Auto straight in its final pot rather than transplanting it. Sow the seed into the container it will finish in, go easy on the feed while it is young, and let it establish without a check. A smooth, uninterrupted start is the single biggest thing you can do for a strong finish.
How much THC does Fat Bastard Auto have?
Fat Bastard Auto is one of the most potent autos around, testing from about 30% up to a huge 38% THC depending on the phenotype and how it is grown. Combined with its balanced 50/50 genetics, the result is a euphoric, powerful, relaxed effect. Because the potency is so extreme, dose it with real care, especially if you are newer to strong strains.
How much does Fat Bastard Auto yield?
It is a strong producer for an auto, giving around 400-600 g/m² indoors in an optimized setup and 125-300 g per plant outdoors on its short cycle. Give it good light, a big enough final pot and an open canopy to get the most from its dense, resinous, extremely potent buds.
What does Fat Bastard Auto taste like?
It has a fruity, skunky flavor: a sweet, ripe fruitiness wrapped in a bold, pungent skunk funk. Myrcene brings an earthy, fruity base, caryophyllene a peppery bite and humulene a hoppy, earthy depth that underlines the skunk. A proper three to four week cure brings that fruity-and-skunky character forward on the inhale.
Is Fat Bastard Auto good for beginners?
To grow, yes. It is a fast, forgiving autoflower with a manageable 1.5 m height and a quick 8 to 10 week cycle, so it suits newer growers. The finished flower, however, is extremely potent at up to 38% THC, so while it is easy to grow, new smokers should dose it with real care.
