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Quebec Blue was one of the first strains we ever bred at Quebec Cannabis Seeds — and years later it is still one of our most popular. It is a berry-sweet, sativa-leaning hybrid built on original QCS genetics. In this Quebec Blue strain review we cover its lineage, flavour, effects, THC, flowering time and yield, plus honest advice for growing it, straight from the breeder that created it.
Quebec Blue at a glance
| Genetics | Blue Fire × Grand Daddy Purple |
| Type | Sativa-leaning hybrid (about 60% sativa / 40% indica) |
| THC | Up to 25% |
| Flowering time | 8 to 10 weeks indoors |
| Outdoor harvest | Mid-October |
| Yield | 500–600 g/m² indoors, up to 750 g per plant outdoors |
| Flavour | Sweet berry and fruit, with a mellow berry finish |
| Grow level | Easy — beginner-friendly |
| Breeder | Quebec Cannabis Seeds (original QCS genetics) |
The origin of Quebec Blue
Quebec Blue was one of the very first strains we bred at QCS. We paired Blue Fire, chosen for its fruit and its clear lift, with Grand Daddy Purple, chosen for its body and its deep colour. The result is a sativa-leaning hybrid that reaches up to 25% THC and stays easy to grow — bred right here in Quebec for short summers and cool nights. You can follow real grows of it on our GrowDiaries.
The original Quebec Blue — accept no imitations
Quebec Blue has become popular enough that we have seen its name borrowed by other sellers, and we have even spotted the bud for sale on dispensary shelves around Oka, Quebec. We take that as a compliment. But whatever the label says elsewhere, the original Quebec Blue genetics were bred here and come only from Quebec Cannabis Seeds. Buy the seeds from us and you are getting the real thing, from the people who made it.
Appearance and flavour
Quebec Blue shows off the Grand Daddy Purple side of its family with hints of purple running through frosty, resin-heavy flowers. The flavour is where it wins people over: sweet berry and fruit, with a mellow berry finish that stays smooth rather than sharp.
Quebec Blue effects
As a sativa-leaning hybrid, Quebec Blue tends toward an upbeat, clear-headed lift from its Blue Fire side, rounded out by the body and calm that Grand Daddy Purple is known for. It is an easygoing, daytime-friendly character rather than a heavy couch-lock. As always, how a strain feels depends on the person, the dose and how it was grown.
Growing Quebec Blue
Quebec Blue is an easy, beginner-friendly strain. Indoors it stays medium height and finishes in 8 to 10 weeks, giving 500 to 600 g/m². Outdoors or in a greenhouse it is ready in mid-October and can yield up to 750 g per plant. It tolerates common pests and mould well — but no strain is ever fully mould-proof, so in a wet season give it good airflow and keep an eye out for powdery mildew. (One of our own diary growers lost flowers to mildew after a wet spell, which is exactly why we report real results rather than promises.)
Is Quebec Blue right for you?
Quebec Blue is a strong pick if you want a berry-sweet hybrid that is forgiving to grow, finishes on time for a Canadian outdoor season, and still delivers up to 25% THC with a generous yield. It is one of the easiest ways to grow genuine QCS genetics, and a great choice for a first grow.
Quebec Blue: frequently asked questions
How long does Quebec Blue take to flower?
8 to 10 weeks indoors. Outdoors it is ready to harvest in mid-October.
How much does Quebec Blue yield?
500 to 600 g/m² indoors, and up to 750 g per plant outdoors or in a greenhouse.
Is Quebec Blue easy to grow?
Yes. It is an easy strain that suits beginners. It stays medium height and tolerates common pests and mould well, though no strain is fully mould-proof.
What does Quebec Blue taste like?
Sweet berry and fruit, with a mellow berry finish.
What are Quebec Blue's genetics?
It is a QCS cross of Blue Fire and Grand Daddy Purple, bred in Quebec. About 60% sativa, 40% indica.
Where can I buy authentic Quebec Blue seeds?
Only from Quebec Cannabis Seeds, the breeder that created it. See Quebec Blue feminized seeds.
