secure connectionHumboldt Auto brings that deep forest calm straight to your grow space. Compact, earthy, and ridiculously easy to grow, this strain does the hard work while you kick back and enjoy the ride.
Humboldt Auto brings that deep forest calm straight to your grow space. Compact, earthy, and ridiculously easy to grow, this strain does the hard work while you kick back and enjoy the ride.
Humboldt Auto is the kind of strain that doesn’t shout for attention but wins growers over fast with its steady performance, calming effects, and effortless grow. This is an autoflower that carries the quiet confidence of good Humboldt County stock, offering an earthy and grounded experience in every sense of the word.
With 20% THC and just enough CBD to round things out, it’s not here to knock your socks off. It’s here to help you ease into the evening, soften the edges, and enjoy that feeling when your brain finally shuts up for a minute. Whether you’re growing in a small tent or tucked away in a cooler outdoor spot, this little gem can handle it.
After bigger yields and a little more control over training and timing? Our Humboldt photoperiod version gives you room to dial everything in.
The name says it all. Humboldt Auto pulls its roots from the legendary hills of Humboldt County, California, a region that practically wrote the book on outdoor cannabis cultivation. By adding Ruderalis to the mix, breeders gave this strain an automatic boost. You still get the calm, forest-born power of the original, paired with the added bonus of autoflowering convenience and a faster turnaround. This one is all about keeping things simple without sacrificing the heritage.
The high settles in slowly but surely, wrapping the body in a deep, steady calm while keeping the mind clear and gently euphoric. It’s not a couch-lock experience, but it does lean into the laid-back. Perfect for quiet nights, solo creative sessions, or winding down after a long day that didn’t go quite to plan.
As for the flavour, you’re getting a full forest experience. Earthy tones come first, followed by a clean pine finish and just enough woodiness to make you think of fresh-cut lumber and mountain trails. It’s not sweet, not fruity, not flashy, and that’s exactly the point. It’s natural, clean, and unmistakably old-school.
At 20% THC, this one brings enough firepower to make an impression, but it does so in a calm and controlled way. The 1% CBD helps smooth the ride, making it less edgy and more restorative. This is the kind of potency that works well across the board. Strong enough to satisfy regular users, yet balanced enough that beginners won’t feel overwhelmed.
The terpene profile keeps things in line with the experience. Myrcene sets the mood with that deeply relaxing, physically soothing quality. Pinene sharpens things up just enough to keep the head from getting too foggy. Caryophyllene adds a subtle kick of warmth that sits nicely in the chest and may even take the edge off a tense body. Together, they give this strain its classic, pine-rich aroma and that steady, comfortable high it’s known for.
This is one of those strains that practically grows itself. It doesn’t mind a bit of beginner clumsiness, doesn’t throw a fit over imperfect conditions, and bounces back quickly if things go sideways. Whether you’re growing your first crop or just want something you don’t have to babysit, Humboldt Auto delivers a smooth ride from start to finish.
Indoors, plants stay nicely compact, usually between 60 cm and 100 cm, which makes them ideal for small tents or stealthier setups. Outdoors, they stretch a little more, peaking between 70 cm and 120 cm depending on conditions, but still stay discreet and manageable. The strong fungal resistance makes it a great choice for growers in cooler or more humid climates. Its genetic stability makes it a reliable performer across a wide range of environments, from mild Mediterranean spots to more temperate or even colder grow zones.
You’re looking at a flowering period of around 70 to 80 days from seed to harvest, which makes this a solid choice for quick turnarounds or squeezing in an extra outdoor run before the weather turns. Indoors, yields typically fall between 350 grams per m2 and 450 grams per m2. Outdoors, you can expect anywhere from 400 grams per plant to 500 grams per plant when given plenty of light and space. It’s not a massive producer, but it punches well above its size class and does it consistently.
If you’re after a no-fuss, compact autoflower with real West Coast roots and a calming, earthy high, Humboldt Auto is one to watch. It’s forgiving, fast, and flavourful, with that subtle strength that makes it easy to love and hard to forget.
Pick up your seeds today at WeedSeedsExpress and see what a humble little powerhouse can do in your garden.
Click here for the full strain description.
| Lineage | Humboldt × Ruderalis |
| Flowering Type | autoflower |
| Gender | feminized |
| Genotype | Indica dominant |
| Ratio | 20 % Sativa / 60 % Indica / 20 % Ruderalis |
| Grower Profile | Beginner |
| THC | Up to 20.00% |
| CBD | Up to 1.00% |
| Yield Indoor | Up to 450 gr./m2 |
| Yield Outdoor | Up to 500 gr./plant |
| Height Indoor | Up to 100 cm |
| Height Outdoor | Up to 120 cm |
| Climate | Mediterranean, Cold, Temperate, Arid |
| Flowering Time | 70 to 80 days |
| Flavors | Earthy, Woody, Pine |
| Terpines | Myrcene, Pinene, Caryophyllene |
| Effects | Relaxed, Euphoric, Calming |
What does Humboldt Autoflower taste and smell like?
Expect a classic West Coast profile with earthy, pine, and citrus notes; some phenotypes lean sweeter with hints of diesel and herbal spice.
How long does Humboldt Autoflower take from seed to harvest?
The autoflowering lifecycle typically completes in about 9–11 weeks from seed under optimal conditions.
Is Humboldt Autoflower suitable for beginners?
Yes. It’s beginner-friendly: resilient, fast, and requires no light schedule change to bloom.
How tall does Humboldt Autoflower get indoors and outdoors?
Compact to medium stature indoors; outdoors it stays manageable and discreet in most climates.
What yield can I expect from Humboldt Autoflower indoors and outdoors?
Produces moderate to high yields when given ample light, balanced nutrition, and adequate root space.
What are the effects of Humboldt Autoflower?
Balanced hybrid-style effects: uplifting at first with a relaxing, calming finish; potency typically ranges medium to high THC with low CBD.
Is Humboldt Autoflower good for indoor and outdoor grows, and what climate does it prefer?
Performs well indoors and outdoors in temperate to warm climates; in cooler regions, a sunny, sheltered spot or greenhouse is recommended.
What light schedule does Humboldt Autoflower need?
As an autoflower, it does not need a switch to 12/12. Many growers run 18–20 hours of light daily from seed to harvest.
Are Humboldt Autoflower seeds feminised?
Yes, Humboldt Autoflower is offered as feminised autoflowering seeds, minimizing the chance of male plants.
Can I train Humboldt Autoflower plants, and if so, how?
Prefers gentle training such as low-stress training (LST). Heavy topping or high-stress techniques are best avoided with autos.
Ordering Information
We are one of the few seed banks still shipping to Australia and have many happy Ozzy customers.
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