Français Jack Herer Autoflower is an original QCS strain: a feminized, sativa-dominant cross of Jack Herer and Ruderalis that QCS lists at 17.25% THC, with about 9 weeks of flowering and about 480 g/m² indoors. This Jack Herer strain review covers our own specs, the twenty real customer reviews on our site and what growers generally report about the Jack Herer family, so you can decide if it fits your garden.
Jack Herer strain at a glance
| Genetics | Jack Herer × Ruderalis |
| Type | Autoflower, feminized, sativa dominant |
| THC | 17.25% |
| Flowering time | About 9 weeks indoors (growers report 11.5 to 14 weeks from seed) |
| Yield | About 480 g/m² indoors, about 150 g per plant outdoors |
| Height | Large for an autoflower, around 4 feet reported |
| Flavour | Spice, citrus, pine, skunk |
| Growing level | Easy to moderate |
| Pack | 5 feminized autoflowering seeds |
| Breeder | Quebec Cannabis Seeds (original QCS genetics) |
What is the Jack Herer strain?
Jack Herer Autoflower is an original QCS strain: Quebec Cannabis Seeds is its original breeder, and these are our own genetics, bred in Quebec since 2015 by a grower with more than 35 years of experience.
Jack Herer is one of the most famous names in cannabis. The original is generally described as a sativa-dominant hybrid that came out of the Netherlands in the 1990s, often credited to a cross involving a Haze hybrid and a Northern Lights and Shiva Skunk line, and named after the cannabis activist and author. It has been a staple of seed catalogues and dispensary shelves ever since.
The QCS version is a different animal in one important way: it is an autoflower. QCS crossed Jack Herer with Ruderalis, so the plant flowers on its own clock instead of waiting for shorter days. The result is a sativa-dominant plant with the spicy, citrusy, piney Jack character, and you never have to change the light schedule.
A note before you search around: many seed companies sell Jack Herer, in photoperiod and auto versions, and each uses its own breeding. Lineages, THC figures and flowering times you read elsewhere may describe a different cross. The numbers on this page are for the QCS version only.
Is Jack Herer indica or sativa?
QCS lists Jack Herer Autoflower as sativa dominant, without an exact percentage. That matches the family's reputation. In the garden it shows up as height: for an autoflower, this one is on the large side, with growers reporting plants around 4 feet tall. Indoors, training is recommended, and the product page suggests a final pot of about 20 litres.
If you want to understand the difference between the two sides of cannabis before choosing, our guide to what indica does to you is a good contrast to this sativa-leaning plant.
Smell and flavour: spice, citrus and pine
QCS lists the taste as spice, citrus, pine and skunk, with haze and pepper notes in the mix. Customers agree: one described a lemony, piney aroma, and another found it skunkier than our Skunk #1 autoflower. Across the web, the Jack Herer family is commonly associated with a pine, woody and earthy profile in which terpinolene is often the dominant terpene, and that fits the bright, clean, slightly peppery character people describe.
As always, drying and curing decide how much of that comes through. One of our reviewers said the harvest and cure smelled excellent after letting the plants run well beyond the nine-week mark.
Jack Herer effects
QCS describes the effect as an uplifting, cerebral high followed by calm. A reviewer who grew it in DWC used nearly the same words, and another described a clear, energetic daytime high. That is consistent with what consumers report across the web for Jack Herer relatives: focus, energy and creativity are the words that come up most, with euphoria and relaxation sometimes mentioned too.
Effects vary from person to person and with the dose. Dry mouth and dry eyes are commonly reported downsides, and a few consumers report anxiety, especially at high doses of racy sativas. Start low and go slowly.
How strong is Jack Herer? THC content
QCS lists Jack Herer Autoflower at 17.25% THC, with no CBD listed. That is a moderate figure, and it suits people who want a clear, functional high rather than a heavy one. The photoperiod Jack Herer on the web is often quoted at a similar or somewhat higher level, but other seed companies' versions may differ; these numbers are for the QCS version only. For something much stronger, see our seeds over 25% THC.
Growing Jack Herer Autoflower: flowering time and yield
QCS lists about 9 weeks of flowering indoors, a yield of about 480 g/m² and about 150 g per plant outdoors. There is no light-cycle change to manage, so you can run 18 to 20 hours of light the whole way. Outdoors, sow after the last frost.
The honest wrinkle is timing. QCS asks you to be patient: some plants are slow to finish, and the page advises waiting up to 14 weeks. Reviewers report between 11.5 and 14 weeks from seed to harvest, which is longer than a quick nine-week figure suggests, because the nine weeks counts the flowering phase only, not the weeks of growth before it. Plan the whole cycle before you commit your tent space.
Practical tips from the product page and reviews: sow straight into the final pot of about 20 litres, avoid transplanting, use low-stress training because the plant stretches, and feed at about half strength. One grower moved plants into full sun in the second half of the cycle and noticed extra trichomes and fatter buds. Harvest by watching trichomes rather than the calendar.
What customers report
Jack Herer Autoflower has twenty reviews on our site and averages 4.6 out of 5, and the product page shows ten of them in full. Here is what they say, including the complaints.
- Easy, hardy growth: several growers praised fast, healthy, sticky plants, one calling it easy to grow outdoors and another saying it did well in DWC.
- Size and training: plants reached about 4 feet outdoors, and an indoor grower found them large and in need of LST.
- Longer than expected: reviewers harvested at roughly 11.5, 12.5 and 14 weeks from seed, with one outdoor plant giving about 100 g and another about 30 g.
- Taste and effect: lemony, piney and skunky aromas, and a clear, energetic daytime high.
- Complaint, slow flowering: one grower rated it 3 out of 5 after an outdoor plant did well but an indoor plant was still not flowering at 92 days, and suspected it might be a photoperiod plant.
- Complaint, germination: one grower rated it 1 out of 5 because all ten seeds sprouted but never grew. QCS replied with an apology and explained its germination and replacement guarantees, and another grower saw two of four seeds germinate.
Is Jack Herer right for you?
Choose Jack Herer Autoflower if you want a classic spicy, citrusy, piney sativa character in an autoflowering plant, a clear daytime effect and a plant that does not need a light schedule. It suits growers with some height to spare and the patience to let it finish. If you need a short, fast, compact plant, look at other autoflowers in our autoflower seeds range.
You can also read our review of Fat Bastard Autoflower for a very different, much stronger autoflower.
Why grow Jack Herer from Quebec Cannabis Seeds?
- Bred in Quebec by the original breeder. Quebec Cannabis Seeds (QCS) is the original breeder of Jack Herer, one of our own QCS Originals, bred here since 2015 by a grower with 35+ years of experience.
- Guaranteed. 80% germination guarantee with replacements, and delivery guaranteed. If a pack under-performs, email us and we make it right.
- Free seeds with every order, and free shipping on orders over $200.
- Fast, discreet shipping. Ships from Quebec within 24 hours Monday to Friday in plain, unbranded packaging, to Canada (Canada Post) and to the USA (1–2 business days by Express).
- Real support. Every email answered within 24 hours.
Jack Herer: frequently asked questions
What is the Jack Herer strain?
Jack Herer Autoflower is an original QCS strain: a feminized autoflower made by crossing Jack Herer with Ruderalis, sativa dominant, with 17.25% THC.
Is Jack Herer indica or sativa?
QCS lists it as sativa dominant. Plants are large for an autoflower, with growers reporting around 4 feet.
Is Jack Herer an autoflower?
The QCS version is. It flowers on its own schedule without a change in light hours.
How strong is Jack Herer?
QCS lists it at 17.25% THC, a moderate figure with an uplifting, cerebral effect.
How long does Jack Herer take to flower?
About 9 weeks of flowering indoors, but reviewers report 11.5 to 14 weeks from seed to harvest, so be patient. These are ranges, not promises.
How much does Jack Herer yield?
About 480 g/m² indoors and about 150 g per plant outdoors.
Is Jack Herer easy to grow?
QCS rates it easy to moderate. Sow in the final pot of about 20 litres, avoid transplanting and use low-stress training.
Where can I buy Jack Herer seeds in Canada and the USA?
Jack Herer Autoflower seeds are sold at Quebec Cannabis Seeds in packs of 5, shipped from Quebec across Canada and to the USA, with germination and delivery guaranteed.
A note on the numbers in this article: harvest dates, flowering times and yields are ranges, not promises. They vary depending on growing conditions: the grower, the method and the season's weather. No strain is 100% mold resistant. How we set these numbers →
About this article
Published by the Quebec Cannabis Seeds team. QCS was founded in 2015 by Trent LaPierre, a Quebec breeder with more than 35 years of hands-on growing experience. Genetics we bred ourselves are described from our own breeding work; when a strain comes from another breeder, we say so and credit them. How we work. Last updated: November 6, 2026.
Sources and further reading: Cannabis Act (Justice Laws, Government of Canada) · Cannabis Regulations (SOR/2018-144). Rules on cannabis seeds differ by province and state; check your local regulations before ordering.
