C-99 x Blueberry (Fast) Feminized Seeds — Speed, Sweetness & Indica Depth

Some crosses just make sense. Cinderella 99 brings electric, cerebral energy and a legendary fast finish. Blueberry brings deep, sweet fruit and a body-melting indica calm. Put them together with a fast-flowering genetic twist, and you get C-99 x Blueberry Fast Feminized — a strain that genuinely earns its place in your grow room without asking much in return.

This is a mostly indica feminized photoperiod strain that flowers in just 6 to 7 weeks, which is frankly remarkable for a photoperiod plant. You're not sacrificing quality for speed here, either. The terpene profile leans into pinene and linalool — a pairing that gives you that crisp, piney freshness layered over soft floral and berry sweetness. Effects land somewhere between uplifted and deeply relaxed, making this one of those strains that works at 6pm just as well as it does at 10pm.

For Canadian growers — especially those working with shorter outdoor seasons in provinces like Ontario or Manitoba — the September harvest window and abbreviated flower time make this a genuinely practical choice, not just a novelty. Five feminized seeds per pack means every single seed is working for you from day one.

What strains make up C-99 x Blueberry Fast Feminized?

C-99 x Blueberry Fast Feminized is a cross of Cinderella 99 and Blueberry, with fast-flowering genetics introduced to dramatically shorten the photoperiod flowering window. The result is a mostly indica hybrid that carries the best traits from both parent lines.

Cinderella 99 — often called C99 by growers who've grown attached to her — is one of the most celebrated sativa-leaning hybrids in cannabis history. She's descended from Jack Herer and Shiva Skunk genetics, and she's famous for two things: an almost unreasonably short flowering time for a sativa-influenced plant, and a pineapple-citrus terpene expression that's immediately recognisable. C99 also contributes a compact, manageable structure and a tendency toward dense, resinous bud development — traits that translate beautifully into this cross.

Blueberry, on the other side, is a deeply indica-rooted strain with a lineage tracing back to Afghani, Thai, and Purple Thai genetics. It's responsible for some of the most iconic berry-forward terpene profiles in the cannabis world, and it contributes a physical, body-centred effect that balances out C99's more cerebral tendencies. Blueberry also tends to produce plants with strong lateral branching and a natural resistance to cold — a useful trait for outdoor growers pushing into September harvests in cooler Canadian climates.

The fast-flowering genetic component is what makes this cross genuinely special. By introducing fast-flowering traits — which carry a recessive autoflowering gene that shortens photoperiod flowering without triggering full autoflowering behaviour — breeders have compressed the flowering window to 6-7 weeks while keeping all the photoperiod control growers rely on. You still flip to 12/12 to trigger flower. You just don't wait as long. Pair this with feminized cannabis seeds for a garden where every plant counts.

What does C-99 x Blueberry Fast smell and taste like?

The dominant terpenes in C-99 x Blueberry Fast are pinene and linalool — and once you understand what those two bring to the table, the whole sensory profile clicks into place. Pinene delivers that sharp, clean, almost forest-fresh quality. Linalool softens everything with a floral, slightly lavender-like sweetness. Together, they create an aroma that's simultaneously bright and calming.

On the nose, expect a blend of fresh blueberry and sweet berry fruit from the Blueberry side, undercut by a crisp, piney freshness that keeps the profile from going too candy-sweet. During the grow, especially in the final two weeks of flower, the smell intensifies considerably. Your neighbours might start asking questions. The cure deepens everything — after two weeks in jars, the berry notes become richer and more complex, while the pine takes on a slightly resinous, almost herbal quality.

On the inhale, the flavour follows the nose closely — sweet berry up front, pine and a faint floral note on the exhale. It's a clean, pleasant smoke or vapour that doesn't overwhelm.

Effects are where this cross really shows its character. The C99 influence hits first — a lifted, clear-headed onset that feels energetic without being anxious. Then the Blueberry genetics settle in underneath, bringing a progressive body relaxation that deepens over the first hour. Linalool is well-documented for its anxiolytic and sedative properties , which explains why this strain lands in that sweet spot between functional and deeply relaxing. It's the kind of high that lets you finish what you're doing before it gently insists you sit down.

How difficult is C-99 x Blueberry Fast to grow?

C-99 x Blueberry Fast is a forgiving, adaptable strain that suits intermediate growers well and won't punish beginners who've done their homework. The mostly indica structure keeps plants compact and manageable, and the fast-flowering genetics mean you're spending less time in the window where problems tend to compound.

Plant height ranges from 80cm to 1.40m, which gives you a reasonable spread depending on how you manage the vegetative phase. Shorter veg times produce compact, bushy plants closer to the 80cm end. Let her run a bit longer in veg and she'll stretch toward the upper range, developing more lateral branching and a larger canopy to fill. In our grows, this strain responded particularly well to low-stress training (LST) during veg — bending and tying down the main stem early encourages a wide, flat canopy that maximises light penetration and pushes multiple bud sites to develop evenly. low stress training cannabis

This is a feminized photoperiod strain, so you control the flip. Move to a 12/12 light schedule when your plants have reached roughly 50-60% of their target height — the fast-flowering genetics mean you'll see less stretch than a standard photoperiod indica, but there's still some upward movement in the first two weeks of flower.

Indoors, this strain performs reliably in both soil and coco coir. In our experience, coco with a well-dialled nutrient schedule tends to push yields toward the upper end of the 350-450 gr/m² range. Soil grows are slightly more forgiving on feeding and produce a slightly more complex terpene expression during cure — a trade-off worth considering depending on your priorities.

Outdoor growers in Canada will appreciate the September harvest window. In British Columbia's mild coastal climate, this strain can be started outdoors in late May and flipped naturally by the shortening days of late summer, finishing well before the first frost risk in most regions. The Blueberry genetics contribute a natural cold tolerance that gives you a bit of buffer if temperatures dip unexpectedly in early September.

How long does C-99 x Blueberry Fast take to flower?

C-99 x Blueberry Fast Feminized flowers in 6 to 7 weeks from the flip to 12/12 — one of the shortest flowering windows you'll find in a photoperiod feminized strain. For context, most indica-dominant photoperiod strains run 8-10 weeks. This strain finishes in the time it takes some plants to barely show pistils.

Indoor yield sits at 350-450 gr/m², which is a solid return for a 6-7 week flower. In our grows, well-trained plants in coco with consistent feeding hit the upper range reliably. Outdoor harvest month is September, which aligns well with Canadian growing seasons and gives you a comfortable buffer before cold weather arrives.

Trichome development is worth watching closely given the compressed timeline. In our experience, this strain's trichomes mature quickly in the final week — checking with a loupe or jeweller's scope from day 38 onward is worthwhile. You'll see a rapid transition from clear to cloudy, with amber development following shortly after. Don't let the fast finish catch you off guard. when to harvest cannabis trichomes

What are the best growing tips for C-99 x Blueberry Fast Feminized?

Given the abbreviated flowering window, the most important thing you can do is get your plants into flower at the right size. Because this strain finishes so quickly, any time lost to a slow start in veg is time you can't recover in flower. Aim for healthy, well-established plants with 4-6 nodes before flipping — don't rush the flip, but don't dawdle either.

Training approach: LST is your best friend here. Start bending the main stem outward at 3-4 nodes and use soft ties to hold the canopy flat. This opens up the lower bud sites to direct light and dramatically improves yield without adding stress that could slow the plant down. Topping is possible but should be done early — by node 3 or 4 — to give the plant enough recovery time before the flip. Given the fast flower, we'd lean toward LST over aggressive topping for most growers.

Feeding: The fast-flowering genetics mean the nutrient timeline is compressed. Transition from grow nutrients to bloom nutrients promptly at the flip, and don't delay the flush. With a 6-7 week flower, you're looking at starting your flush around week 5 to 5.5. Running a late flush on a fast-finishing strain is one of the most common mistakes we see — the plant finishes before the flush is complete, and you end up with harsh smoke.

Environment: Keep humidity below 50% RH once flower begins. The dense, resinous buds this cross produces — particularly the Blueberry-influenced phenos — can be susceptible to moisture retention in the bud structure. Good airflow through the canopy is essential.

Outdoor tip for Canadian growers: If you're growing outdoors in Quebec or other provinces with a shorter summer, starting seeds indoors under 18/6 in late April and transplanting outside in late May gives you a strong vegetative head start. The plant will flip naturally as days shorten in August, finishing comfortably in September. outdoor cannabis growing Canada

Curing: Don't skip the cure. The pinene and linalool terpene profile in this strain genuinely improves with a proper 2-3 week cure in sealed glass jars, burped daily for the first week. The berry notes deepen noticeably, and the smoke becomes smoother. It's the difference between a good harvest and a great one.

C-99 x Blueberry Fast Feminized is one of those strains that rewards growers who appreciate efficiency without compromise. You get a genuinely fast photoperiod flower — 6 to 7 weeks — a sweet, piney terpene profile built around pinene and linalool, and effects that balance cerebral lift with deep indica relaxation. The yield sits at 350-450 gr/m² indoors, the plant stays manageable at 80cm to 1.40m, and the September harvest window makes it a practical choice for Canadian outdoor growers working against the clock.

What we keep coming back to with this strain is how much it delivers relative to the time it asks of you. Faster flowering strains sometimes feel like a trade-off. This one doesn't. The Cinderella 99 genetics keep the quality high, the Blueberry genetics keep the flavour deep, and the fast-flowering trait just gets you there sooner.

If you're building out a grow and want a strain that performs reliably, finishes quickly, and smokes beautifully — this pack of five feminized seeds is worth every one of those seeds.