Français OG Jack is an original QCS strain: a feminized autoflower that is 60% sativa with 19 to 23% THC, 7 to 8 weeks from seed to harvest and 300 to 500 g/m² indoors. This OG Jack strain review covers the (Jack Herer x OG Kush) x Ruderalis genetics, the citrus and skunk flavour, the uplifting effects growers tend to describe and how to run it.
OG Jack strain at a glance
| Genetics | (Jack Herer × OG Kush) × Ruderalis |
| Type | Autoflower, feminized, 60% sativa / 40% indica |
| THC | 19 to 23% |
| Seed to harvest | 7 to 8 weeks |
| Yield | 300 to 500 g/m² indoors, 150 to 300 g per plant outdoors |
| Flavour | Citrus, earthy, skunk, floral |
| Growing level | Beginner-friendly, compact |
| Pack | 5 feminized autoflowering seeds |
| Breeder | Quebec Cannabis Seeds (original QCS genetics) |
What is the OG Jack strain?
OG Jack is an original QCS strain: Quebec Cannabis Seeds is its original breeder, and these are our own genetics bred in Quebec.
OG Jack is an autoflowering cross bred by Quebec Cannabis Seeds from Jack Herer and OG Kush, with Ruderalis added so that it flowers on its own schedule. The pairing is a natural one: Jack Herer is commonly described as a bright, spicy, pine-and-citrus sativa-leaning classic, and OG Kush as a gassy, lemony Californian staple.
Jack Herer is generally traced to Dutch breeding in the 1990s and named after the cannabis activist; OG Kush has a debated Californian origin. Neither history is settled, so treat the stories as folklore rather than fact. What matters for a grower is the result: a fast, fairly compact autoflower with a lively profile.
Several seed companies sell their own crosses under similar names. Other seed companies sell strains with the same or a similar name, and their versions may differ, so the numbers on this page are for the QCS version only.
Is OG Jack indica or sativa?
QCS lists the balance at 60% sativa and 40% indica, so it leans sativa. Both parents are known for uplifting character, which the QCS page echoes: uplifting and euphoric, with a soothing effect on the body from the indica share. If you want to know what that 40% brings, see our page on what indica does to you.
Smell and flavour: citrus, earthy and skunky
QCS lists the taste as citrus, earthy, skunk and floral, and describes the flavour as citrus and sweet with earthy undertones and a pungent, skunky smell. That lines up with how consumers talk about OG Kush (lemon, fuel) and Jack Herer (pine, spice, herbs).
It is a pungent plant. Odour control is advised indoors, and a carbon filter is the usual solution.
OG Jack effects
QCS describes the effects as uplifting and euphoric, with a soothing effect on the body. Consumers of Jack Herer and OG Kush commonly mention a clear, energetic and happy start, which tends to make sativa-leaning plants a better match for daytime or social use than for bedtime.
At 19 to 23% THC, it is strong enough to deserve respect: QCS advises newer consumers to start with a small amount. Effects vary, and nothing here is medical advice.
How strong is OG Jack? THC content
QCS lists OG Jack at 19 to 23% THC. That is a wide range, reflecting how much the result depends on how the plant is grown, dried and cured. If you want even higher numbers, see our THC over 25% collection.
To make the most of an autoflower, keep conditions stable (stress can cut yield and quality) and harvest by trichome development rather than by the calendar.
Growing OG Jack: seed to harvest and yield
OG Jack is rated easy to grow, even for beginners, and carries the "Beginner-friendly", "Mold tolerant" and "Compact, balcony-friendly" badges. Mold tolerant means less prone to mould, not immune. QCS gives 7 to 8 weeks for the whole cycle from seed to harvest, not flowering alone, with no separate indoor flowering time or outdoor harvest date.
Yield is listed at 300 to 500 g/m² indoors and 150 to 300 g per plant outdoors, as ranges rather than guarantees. For outdoor growing, QCS notes that sowing after the last frost in Quebec and Ontario leaves time to finish before autumn.
Planting tips from the product page: sow straight into the final pot because autoflowers dislike transplanting, keep the medium damp but not soaked at about 22 to 25 C until the seedling emerges, and keep conditions steady. Autoflowers are forgiving but still need regular watering, feeding and checks. Our autoflower guide has more.
What customers report
OG Jack has no customer reviews yet on our site, so there are no real grower reports to quote and we will not invent any. Everything here comes from the QCS product page and general knowledge of Jack Herer and OG Kush.
If you grow it, send us your notes, honest complaints included. Our 80% germination guarantee with replacements covers every pack.
Is OG Jack right for you?
Choose OG Jack if you want a fast, compact autoflower with citrus-and-skunk flavour and an uplifting, euphoric effect at moderate-to-strong potency. For a heavier, more relaxing option, look at our feminized seeds or read our review of Black Cherry OG.
Why grow OG Jack from Quebec Cannabis Seeds?
- Bred in Quebec by the original breeder. Quebec Cannabis Seeds (QCS) is the original breeder of OG Jack, 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.
OG Jack: frequently asked questions
What is the OG Jack strain?
OG Jack is an original QCS autoflower made from Jack Herer and OG Kush crossed with Ruderalis. It is 60% sativa and 40% indica with 19 to 23% THC.
Is OG Jack indica or sativa?
It is sativa dominant: 60% sativa and 40% indica according to the QCS product page.
How strong is OG Jack?
QCS lists 19 to 23% THC. Newer consumers should start with a small amount.
How long does OG Jack take from seed to harvest?
About 7 to 8 weeks from seed to harvest. QCS gives this as the whole life cycle, not a separate flowering time.
How much does OG Jack yield?
300 to 500 g/m² indoors and 150 to 300 g per plant outdoors, as ranges rather than guarantees.
Is OG Jack easy to grow?
Yes. QCS describes it as easy to grow, even for beginners, compact and mold tolerant (not immune).
What does OG Jack taste and smell like?
QCS lists citrus, earthy, skunk and floral, with a citrus and sweet flavour, earthy undertones and a pungent, skunky smell.
Where can I buy OG Jack seeds in Canada and the USA?
Quebec Cannabis Seeds sells feminized OG Jack autoflower seeds in packs of 5, 10 and 20. We ship across Canada in 3 to 7 days (2 to 3 days Express) and to the USA in 1 to 2 business days by Express, with free shipping over $200 and an 80% germination guarantee.
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.
