Français Northern Jack is an original QCS strain: a feminized, 50/50 autoflower that QCS lists at 6 to 8 weeks of flowering and 300 to 450 g/m² indoors. This Northern Jack strain review covers the genetics, the herbal and spicy flavour, the effects growers tend to describe and how to run it, using our own product specs and what is known about its parent lines.
Northern Jack strain at a glance
| Genetics | (Northern Lights × Big Bud) autoflower female × BigJack (Jack Herer × White Widow) autoflower male |
| Type | Autoflower, feminized, 50/50 hybrid |
| THC | High (no exact figure listed by QCS) |
| CBD | Low |
| Flowering time | 6 to 8 weeks indoors |
| Yield | 300 to 450 g/m² indoors, 200 to 450 g per plant outdoors |
| Height | Medium |
| Flavour | Herbal, earthy, spicy |
| Pack | 5 feminized autoflowering seeds |
| Breeder | Quebec Cannabis Seeds (original QCS genetics) |
What is the Northern Jack strain?
Northern Jack is an original QCS strain: Quebec Cannabis Seeds is its original breeder, and these are our own genetics bred in Quebec.
Northern Jack is an autoflowering cross developed by Quebec Cannabis Seeds. The mother is a female autoflower from Northern Lights x Big Bud, and the pollen donor is BigJack, an autoflowering male from Jack Herer x White Widow. In plain terms, it blends two heavyweight families: the calm, resinous Northern Lights side with the productive Big Bud line, and the bright, spicy Jack Herer side with the frosty White Widow.
The result is a balanced 50/50 hybrid that finishes quickly. QCS lists 6 to 8 weeks of flowering indoors, a medium plant height and a high-THC, low-CBD profile. Because it carries autoflowering genetics, it does not wait for a change in daylight; it simply moves from seedling to flower on its own schedule. If you have never grown an autoflower before, that is the main thing to understand.
A note on names: several breeders sell strains called Northern Jack or something close to it. 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. Only the QCS page numbers are used here.
Is Northern Jack indica or sativa?
Northern Jack is described by QCS as a 50/50 hybrid, so neither side clearly leads. The page does not break the balance down into percentages, and we will not invent them. What you can reasonably expect comes from the parents: Northern Lights is widely described as an indica-leaning, relaxing line, while Jack Herer is usually described as a more uplifting, sativa-leaning one, and White Widow and Big Bud both lean toward resinous, productive indica traits.
That blend is why QCS describes the effect as upbeat at first and then more settled. If you want to understand what the indica half brings, our guide to what indica does to you explains the body-side feel in more detail.
Smell and flavour: herbal, earthy and spicy
QCS lists the taste as herbal, earthy and spicy, and notes that the spicy lift comes from the Jack Herer side. That fits how Jack Herer is usually described by consumers: pine, herbal and peppery notes rather than candy or dessert flavours. The Northern Lights side typically adds a mellow, earthy, slightly sweet base.
Expect a plant with a noticeable aroma during the last weeks of flowering, as with most resinous hybrids. If you grow in a tent or in a shared home, plan for a carbon filter before the smell arrives rather than after.
Northern Jack effects
QCS describes the effect as upbeat at first and then more settled. Growers and consumers of the parent strains commonly report a clear, positive start from the Jack Herer side followed by a calmer, heavier feel from the Northern Lights side, which suits a late-afternoon or evening session better than a morning before work.
Effects always vary from person to person and depend on how the plant is grown, dried and cured. THC is described as high on the QCS page, so if you are new to potent cannabis, start low and go slow. Nothing here is medical advice, and no plant can promise a specific effect.
How strong is Northern Jack? THC content
The QCS page describes Northern Jack as high in THC and low in CBD but does not give a number, so this review does not show a THC percentage or chart. If a figure is added to the product page later, that figure is the one to trust. For a sense of scale, high-THC autoflowers in our catalog are covered in the THC over 25% collection, and you can email us if you want help choosing between a gentler and a stronger option.
In practice, potency is shaped by light intensity, nutrition, harvest timing and curing as much as by genetics. Picking by trichome colour rather than by the calendar, as most autoflower guides recommend, is the simplest way to make the most of whatever the plant has.
Growing Northern Jack: flowering time and yield
Northern Jack is a good fit for growers who want a quick turnaround. QCS lists 6 to 8 weeks of flowering indoors, and because it is an autoflower the same long-day light schedule can be used from start to finish. Plants stay at a medium height, so they suit most tents without extreme training.
Yield is listed at 300 to 450 g/m² indoors and 200 to 450 g per plant outdoors. Those are ranges from the QCS product page, not guarantees. The outdoor range is wide because sun, pot size and weather matter a lot; the QCS page does not give an outdoor harvest date, but with an autoflower you can sow after the last frost and let the plant finish on its own clock.
General autoflower advice applies: sow directly into the final pot because autoflowers dislike transplanting, keep the medium damp but not soaked until the seedling emerges, avoid heavy stress, and decide when to harvest by trichome development. See our autoflower seeds guide for a full starting method.
What customers report
Northern Jack is a recent addition to our catalog and the product page currently shows no customer reviews, so we have no real grower reports to quote and we will not make any up. What we can say comes from the QCS specifications and from general knowledge of the parent lines.
If you grow it, we would like to hear how it went. Send us your notes by email, including any honest complaints, and we will use them to improve the breeding notes. Every pack is also covered by our 80% germination guarantee with replacement seeds.
Is Northern Jack right for you?
Choose Northern Jack if you want a fast, medium-sized autoflower with a herbal, spicy and earthy profile and a balanced uplift-then-settle effect. It is a sensible pick for growers who like Jack Herer character but want a quicker finish and a calmer landing. If you prefer a purely photoperiod grow with stretch and training, browse our feminized seeds instead.
Ready to compare? Our review of Fat Bastard covers another QCS autoflower at the stronger end, and the full autoflower collection has the rest.
Why grow Northern Jack from Quebec Cannabis Seeds?
- Bred in Quebec by the original breeder. Quebec Cannabis Seeds (QCS) is the original breeder of Northern 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.
Buy Northern Jack seeds → Canada delivery Shipping to the USA
Northern Jack: frequently asked questions
What is the Northern Jack strain?
Northern Jack is an original QCS autoflower made by crossing a Northern Lights x Big Bud female autoflower with BigJack, a Jack Herer x White Widow autoflower male. It is a 50/50 hybrid.
Is Northern Jack indica or sativa?
QCS lists it as a balanced 50/50 hybrid. No separate indica and sativa percentages are given on the product page.
How strong is Northern Jack?
QCS describes the THC as high and the CBD as low but does not list an exact percentage. Start with a small amount.
How long does Northern Jack take to flower?
About 6 to 8 weeks of flowering indoors. These are ranges, not promises.
How much does Northern Jack yield?
About 300 to 450 g/m² indoors and 200 to 450 g per plant outdoors, as ranges rather than guarantees.
Is Northern Jack easy to grow?
It is an autoflower of medium height, so no light-cycle change is needed. QCS does not give a difficulty rating, but autoflowers are generally forgiving if you avoid transplanting and heavy stress.
What does Northern Jack taste and smell like?
QCS lists the taste as herbal, earthy and spicy, with the spicy lift coming from the Jack Herer side.
Where can I buy Northern Jack seeds in Canada and the USA?
Northern Jack feminized autoflower seeds are sold by Quebec Cannabis Seeds in packs of 5. 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.
