How to Grow Jack Herer x GG4 Auto
Jack Herer x GG4 Auto is a fast, balanced hybrid autoflower prized for its pungent citrus-diesel flavor and potent, well-rounded high. It carries a high 20–25% THC, a citrus, diesel, earthy, pine and spicy taste, and a euphoric, relaxed, munchie-inducing effect on a compact, resinous plant that goes from seed to harvest in just 9–10 weeks.
Built by crossing Jack Herer with GG4 and adding ruderalis, this is a 50% indica, 50% sativa autoflower. Jack Herer (from Northern Lights, Skunk and Haze) brings an uplifting, energetic, pine-and-spice character, while GG4 (from Chem Sis, Sour Dubb and Chocolate Diesel) adds sticky resin, fuel-driven depth and a powerful, relaxing body side.
Recommended Strains
Jack Herer x GG Autoflower
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THC | 20% - 25% (High) |
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Type | Autoflowering |
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Yield | Medium |
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Phenotype | 50% Indica / 50% Sativa |
Gelato x GG
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THC | 24% - 28% (High) |
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Type | Feminized |
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Yield | High |
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Phenotype | 85% Indica / 15% Sativa |
Because it flowers on its own, finishes fast and stays compact, Jack Herer x GG4 Auto is an easy, rewarding grow. You can see the full genetics and buy Jack Herer x GG4 Auto seeds on the strain page, and browse more of our high-THC seeds alongside it.
Strain Profile at a Glance
| THC | 20–25% (high) |
|---|---|
| Lineage | Jack Herer x GG4 x Ruderalis |
| Type | Autoflowering |
| Genetics | 50% Indica / 50% Sativa |
| Climate | Temperate |
| Life cycle | 9–10 weeks seed to harvest |
| Harvest | All season |
| Height | 3.94 ft / 1.2 m |
| Yield indoor | 1.15–1.47 oz/ft² (350–450 g/m²) |
| Yield outdoor | 4.23–8.47 oz/plant (120–240 g/plant) |
| Grow difficulty | Beginner-friendly |
| Flavors | Citrus, Diesel, Earthy, Pine, Spicy |
| Effects | Euphoric, Relaxed, Munchie-inducing |
Promos & Deals
Growing Autoflowering Seeds
As an autoflowering strain, Jack Herer x GG4 Auto flowers automatically with age rather than on a light change, so there is no need to switch light schedules to start bloom. You can run it under a long day, around 18–20 hours of light, right through its whole life, which keeps things simple and makes it a great choice for beginners.
Because an autoflower runs on a fixed internal clock, the key is to avoid checking its growth. Start each seed in its final pot to avoid transplant shock, since every lost day in a short life cycle costs you yield. Feed it lightly and keep the whole run smooth, so the plant can move from seedling to harvest in its 9–10 week window.
Climate and Where to Grow It
Jack Herer x GG4 Auto does well in a temperate climate with plenty of light and good airflow. As an autoflower it is flexible, and because it does not depend on the light cycle you can harvest in any season as long as the weather is warm enough. It stays compact at about 1.2 m, so it fits most tents and discreet spaces.
Indoors it gives a solid 350–450 g/m², while a single quick outdoor auto plant yields around 120–240 g depending on conditions. Those numbers depend on light, pot size and healthy roots, so for the best harvest give it good light and a steady feed through its short cycle.
Indoors, aim for daytime temperatures around 70–82°F (21–28°C) and keep steady airflow moving through the canopy. Its sticky, GG4-influenced buds hold moisture, so keep humidity in check as flowering fills in, and because the life cycle is short, consistency matters more than any single big intervention.
Feeding Schedule (EC Guide)
Autoflowers prefer a lighter feed than photoperiod plants, so keep concentrations modest and let the plant lead. Start low, build up gently through its quick cycle, and taper off for the final flush so the citrus-and-diesel flavor comes through clean and the smoke finishes smooth.
| Stage | EC (mS/cm) | Notes |
|---|---|---|
| Seedling | 0.4–0.6 | Very light feed, focus on healthy root growth |
| Vegetative growth | 0.8–1.2 | Build the frame, raise nitrogen gradually |
| Early flower | 1.2–1.4 | Shift toward bloom nutrients (P and K) |
| Full flower | 1.4–1.6 | Peak bloom feed while the sticky buds swell |
| Flush | 0.0–0.4 | Plain water for the final 1–2 weeks |
Flowering and Harvest
Jack Herer x GG4 Auto flowers automatically a few weeks after germination and finishes its whole cycle in about 9–10 weeks from seed. As a balanced hybrid it stays fairly compact and fills in dense, sticky, resin-coated buds that develop their citrus-diesel aroma and heavy trichome coat through the second half of flower.
Because the plant sets its own schedule, watch the plant rather than the calendar: harvest when most trichomes have turned cloudy with a few amber heads for the fullest expression, and run a short plain-water flush in the last week or two before you cut it down.
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 stops the dense, sticky buds staying damp in the middle while the outside dries out, which protects both the citrus-diesel aroma and the heavy 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 brings the citrus, pine and diesel notes forward and smooths the smoke, which is exactly what this resinous Jack-lineage autoflower deserves.
What to Do With Your Trim
Don’t bin the sugar leaves you remove while manicuring. Jack Herer x GG4 Auto is a sticky, resin-rich plant thanks to its GG4 side, so the trim is excellent for dry sift, bubble hash or rosin, giving you a bonus run of pungent, citrus-diesel concentrate from material most growers would otherwise throw away.
Flavor and Terpenes
Jack Herer x GG4 Auto has a bold, complex profile: a bright citrus and pine lift from the Jack Herer side over a pungent diesel, earthy and spicy base from GG4. It is a punchy, layered taste rather than a simple sweet one, carried straight from its two champion parents into the cured flower on a fast, automatic plant.
Its terpene profile is compact, led by caryophyllene for the peppery, diesel-like bite and myrcene for an earthy base, with pinene bringing the fresh pine-and-citrus lift and humulene a woody, grounding depth. The bright citrus character comes through from the Jack Herer heritage and that fresh pinene rather than from an added citrus terpene, balanced against GG4’s fuel-driven funk.
Effects and Best Use
With its balanced 50/50 genetics, Jack Herer x GG4 Auto is reported as euphoric, relaxed and munchie-inducing, opening with a quick, uplifting cerebral buzz from the Jack Herer side before GG4’s body side eases in with a comfortable relaxation. It stays well-rounded rather than couch-locking, and tends to bring on the munchies, so keep snacks handy.
At a high 20–25% THC it is genuinely potent, so newer users should start low and build up, while experienced users will enjoy the balanced lift and heavy resin it brings. That character, the pungent citrus-diesel flavor, the Jack Herer and GG4 heritage and the fast, compact autoflower plant are exactly why growers reach for it.
Common Problems and Pro Tips
The biggest thing to get right with Jack Herer x GG4 Auto is its short, fixed life cycle. Because an autoflower cannot be kept in veg to recover, any early setback permanently costs yield, so start each seed in its final pot to avoid transplant shock, use a light, airy substrate, and keep the seedling stage smooth and gentle.
Humidity around its sticky buds is the other thing to watch. Its GG4-influenced resin-heavy colas trap moisture, so bud rot is a risk late in flower. Keep humidity in check through the back half of bloom, run steady airflow, and a light defoliation of the inner canopy helps air reach the thickest, stickiest buds on the compact plant.
As a pro tip, lean into what this strain does best: its 9–10 week cycle and compact size make it ideal for a quick, discreet grow, and its sticky resin rewards saving the trim for hash. Keep the feed modest, use gentle low-stress training early rather than heavy topping, give it a clean plain-water flush at the end, and follow the trichomes for the best finish.
FAQ
Is Jack Herer x GG4 Auto an autoflower?
Yes. Jack Herer x GG4 Auto flowers automatically with age rather than on a light change, thanks to the ruderalis in its lineage. You can run it under long days of 18–20 hours of light for its whole life, with no light-schedule switch needed to start bloom, which is what makes it so simple and beginner-friendly to grow.
Is Jack Herer x GG4 Auto indica or sativa?
It is a balanced hybrid, at 50% indica and 50% sativa, from its Jack Herer and GG4 parents. That even split shows in a quick, uplifting cerebral buzz from the Jack Herer side easing into GG4’s comfortable body relaxation, so it stays well-rounded and functional rather than couch-locking or racy.
What does Jack Herer x GG4 Auto taste like?
It has a bold, complex flavor: a bright citrus and pine lift over a pungent diesel, earthy and spicy base. Caryophyllene drives the peppery diesel bite, pinene brings the fresh pine-and-citrus lift from the Jack Herer side, and myrcene and humulene add the earthy depth, balanced against GG4’s fuel-driven funk.
What is Jack Herer x GG4 Auto’s THC level?
It carries a high THC of 20–25%, so it is genuinely potent rather than mild. That strength drives a euphoric, relaxed, munchie-inducing effect that stays balanced, so newer users should start with a small amount and build up, while experienced users will enjoy the lift and the heavy resin it brings.
How long does Jack Herer x GG4 Auto take from seed to harvest?
About 9–10 weeks from germination to harvest, faster than a photoperiod strain. Because it is an autoflower, it moves from seedling to flowering on its own without any light-cycle change, which lets you fit several runs into a single year, especially useful indoors where you control the environment.
How much does Jack Herer x GG4 Auto yield?
Indoors it gives a solid 350–450 g/m², while a single outdoor auto plant yields around 120–240 g depending on conditions. Those numbers depend on light, pot size and healthy roots, so start it in its final pot, give it good light, and feed it steadily through its short cycle to reach the top of the range.
