How to Grow Jack Herer Auto
Jack Herer Auto is a quick, compact autoflowering version of the legendary Jack Herer, crossed with ruderalis for automatic flowering. It is a 60/40 sativa-leaning plant with a moderate 15-20% THC, an earthy, piney and skunky flavor, and a happy, relaxed and talkative effect. Small, hardy and fast from seed to harvest, it brings the classic Jack Herer character into an easy, beginner-friendly auto.
This is an autoflowering strain, so it flowers on its own with age rather than on a change in the light cycle, running from seed to harvest in about 8 to 10 weeks. The seeds are feminized, so every plant grows into a flowering female and you never have to identify the sex or remove males. Its Haze, Northern Lights and Shiva Skunk roots, carried on a ruderalis backbone, give it a hardy structure, a classic earthy-pine profile and a dependable, quick harvest.
Recommended Strains
Jack Herer Auto
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THC | 15% - 20% (Medium) |
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Type | Autoflowering |
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Yield | Medium |
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Phenotype | 40% Indica / 60% Sativa |
Jack Herer
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THC | 20% (Medium) |
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Type | Feminized |
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Yield | High |
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Phenotype | 40% Indica / 60% Sativa |
Compact, funky and fast, Jack Herer Auto is a rewarding way to grow a classic sativa in a short season and a small space. You can see the full genetics and buy Jack Herer Auto seeds on the strain page, and browse the rest of our autoflowering seeds alongside it.
Strain Profile at a Glance
| THC | Moderate (15-20%) |
|---|---|
| Lineage | Haze x Northern Lights x Shiva Skunk x Ruderalis |
| Type | Autoflowering (feminized) |
| Genetics | 40% Indica / 60% Sativa |
| Climate | Temperate, warm |
| Life cycle | 8-10 weeks seed to harvest |
| Harvest | All season |
| Height | 3.28 ft / 1 m |
| Yield indoor | 1.15-1.31 oz/ft² (350-400 g/m²) |
| Yield outdoor | 19.4 oz/plant (550 g/plant) |
| Grow difficulty | Easy, beginner-friendly |
| Flavors | Earthy, Pine, Skunk |
| Effects | Happy, Relaxed, Talkative |
Promos & Deals
Growing an Autoflowering Strain
Jack Herer Auto flowers automatically with age rather than in response to the light cycle, thanks to the ruderalis in its genetics. That means it does not need a switch to 12/12 to start flowering; it begins on its own after a few weeks and runs from seed to harvest in about 8 to 10 weeks. You can give it long days of 18 to 20 hours of light the whole way through, which keeps it growing and ripening without ever flipping the timer.
Because the life cycle is fixed, the plan matters more than with a photoperiod plant: you cannot veg it longer to make it bigger, so start it in its final pot, keep any training light, and avoid stress so it uses its short life to build buds. In return you get a very compact plant of around 1 m, which makes it one of the easiest ways to grow a Jack Herer sativa in a small tent or a tight space.
Climate and Where to Grow It
Jack Herer Auto does well in a warm, temperate or Mediterranean-style climate with plenty of sun, steady warmth and good airflow. Because it is an autoflower, it is not tied to the seasons: it finishes on its own short timer, so you can run it all season and even fit more than one cycle into a warm year.
It performs well indoors and out. Indoors it returns a moderate 350-400 g/m² in a well-managed tent, while outdoors a healthy plant with sun gives around 550 g. As a compact sativa auto of only about 1 m it stays small and discreet, so it fits where a taller Jack Herer never could, and the main job is simply keeping the canopy open so light and air reach the lower buds.
Keep humidity under control through flowering to protect the buds: around 55-60% early on, nearer 40-45% as the flowers fill out, and lower toward harvest. A resinous, skunky auto can hold moisture inside its buds, so steady airflow and sensible humidity keep the finish clean. Aim for daytime temperatures around 72-82°F (22-28°C), which this warm-climate plant enjoys.
Feeding Schedule (EC Guide)
Jack Herer Auto is a light-to-moderate feeder, and as a small autoflower it pays to go gently: build nutrients up slowly and let the plant set the pace, since there is no long veg to recover from mistakes. Feed it through its cycle, then taper off for the final flush so the earthy-pine flavor comes through clean and the smoke finishes smooth. 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 |
| Early growth | 0.8-1.2 | Raise nitrogen 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
Because it is an autoflower, Jack Herer Auto starts flowering on its own after a few weeks of growth and runs from seed to harvest in about 8 to 10 weeks, with no light-cycle change needed. Despite its sativa lean it stays short and compact at around 1 m, filling out with tidy, resinous buds rather than stretching tall. Thanks to that quick, self-timed cycle you can harvest it all season and fit it into a short window.
Yields are solid for such a small auto: around 350-400 g/m² indoors and around 550 g per plant outdoors with good sun and space. Give it a little gentle training so the lower buds get light, feed it lightly through its cycle, and harvest when most of the trichomes have turned cloudy for the fullest earthy-pine flavor and the best of its moderate potency.
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 is important even on a fast auto, because buds can stay damp in the middle while the outside dries, and a gentle dry protects both the aroma and the resin.
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 develops the full earthy, piney and skunky character and smooths the smoke, which matters on a Jack Herer strain where that classic, funky-pine flavor is the main attraction.
What to Do With Your Trim
Don’t bin the sugar leaves you remove while manicuring. Jack Herer Auto carries a good coat of resin, so its trim works well for dry sift, bubble hash or rosin. It makes for a classic earthy-pine concentrate run from material most growers would otherwise throw away, a nice bonus from a small, quick auto.
Flavor and Terpenes
Jack Herer Auto keeps the classic Jack flavor: an earthy, piney nose with a skunky, funky undertone. It is a savoury, woodsy profile rather than a sweet one, and a good cure really brings that earthy-pine character forward in the jar and on the inhale.
Its terpene profile is complex, but a few lead the way. Alpha-pinene drives the fresh, sharp pine note that defines the aroma, while terpinolene brings the bright, herbal lift that runs through so many Haze-influenced strains. Delta-3-carene adds to the crisp, piney sharpness, with a skunky, earthy funk underneath from its wider terpene mix and a touch of eugenol spice. Together they frame the earthy, pine and skunk character Jack Herer Auto is known for.
Effects and Best Use
With its moderate 15-20% THC and mostly 60% sativa make-up, Jack Herer Auto delivers an easy-going, sociable experience rather than an overwhelming one. It is reported as happy, relaxed and talkative, so it settles you into a relaxed, cheerful and chatty frame of mind, which makes it versatile from the afternoon into the evening. Its moderate potency also makes it an approachable, easy strain to enjoy.
That happy, relaxed and talkative profile makes it a good social strain, well suited to unwinding with friends or simply relaxing with good company. The combination of a small, easy auto grow, a solid yield and a classic earthy-pine flavor, all at an approachable potency, is exactly why it stands out.
Common Problems and Pro Tips
The biggest thing to get right with Jack Herer Auto, as with any autoflower, is the planning: because its life cycle is fixed and fairly short, you cannot veg it longer to fix a slow start. Start it in its final pot to avoid transplant stress, keep any training light, and do not let early problems linger, since the plant has little spare time to recover before it flowers.
Its small size is an advantage, but it still benefits from a tidy canopy: keep the air moving around and through the plant, hold humidity down as the buds fill out, and defoliate a few of the largest fan leaves in mid-flower so light reaches the lower buds. Because it stays around 1 m, it is easy to tuck into a small tent or a corner of the garden.
As a pro tip, go gentle on the nutrients: autos are smaller, lighter feeders, so it is easy to overdo it, and a lighter touch keeps that earthy-pine flavor clean. Finish with a plain-water flush and a full three to four week cure, which is what develops the classic Jack Herer character.
FAQ
Is Jack Herer Auto an autoflowering strain?
Yes. Jack Herer Auto is an autoflowering, feminized strain, so it flowers on its own with age rather than needing a switch to a 12/12 light cycle, and every seed grows into a flowering female. You can run it under long 18 to 20 hour days from seed to harvest. That automatic, no-sexing, no-flip grow is a big part of why autos suit first-time growers so well.
How much THC does Jack Herer Auto have?
Jack Herer Auto has a moderate THC of around 15-20%, which makes it approachable rather than overwhelming. Combined with its mostly 60% sativa genetics, the result is a happy, relaxed and talkative effect that works from the afternoon into the evening. That moderate potency makes it an easy strain to enjoy without overdoing it.
How long does Jack Herer Auto take to grow?
Jack Herer Auto runs from seed to harvest in about 8 to 10 weeks, since as an autoflower it starts flowering on its own after a few weeks rather than waiting for a light-cycle change. That quick, self-timed cycle means you can grow it all season and even fit more than one run into a warm year, which is one of the main appeals of an auto.
What does Jack Herer Auto taste like?
Jack Herer Auto keeps the classic Jack flavor: an earthy, piney nose with a skunky, funky undertone, savoury rather than sweet. Alpha-pinene drives the pine, terpinolene brings a bright herbal lift, delta-3-carene adds crisp sharpness and a touch of eugenol lends spice. A proper three to four week cure really brings that earthy-pine character forward.
How much does Jack Herer Auto yield?
Jack Herer Auto is a solid producer for such a small auto, giving around 350-400 g/m² indoors and around 550 g per plant outdoors with good sun and space. Results depend on light, pot size and canopy health, so start it in its final pot, feed it lightly through its cycle, and keep an open canopy so the lower buds develop well.
Is Jack Herer Auto good for beginners?
Yes. Jack Herer Auto is a beginner-friendly plant: it is a very compact auto at around 1 m, feminized so there is no sexing, and it finishes fast in 8 to 10 weeks with no light-cycle change to manage. Its small size makes it easy to fit and manage, so with a little planning and gentle feeding it makes a great, low-fuss first grow.
