Karel’s Haze Regular Sativa Hybrid – Super Sativa Seed Club
Karel’s Haze Regular by Super Sativa Seed Club (SSSC) is one of the cornerstones of the modern selection of the Dutch seedbank, a true biological bridge between the Haze genetics of the past and contemporary stability.
This extraordinary regular cross stems from the phylogenetic union between a legendary Old School Haze (preserved untouched for decades) and an elite selection of Super Silver Haze. The botanical focus of this variety is centered on providing a total and exotic Haze experience, but enclosed within a significantly shortened and accessible life cycle compared to ancestral sativas.
It develops a majestic, slender, branched, and elegantly open structure. Its branch plane displays amazing agronomic vigor, with woody and robust stems ready to support imposing floral clusters. Being regular seeds, it expresses unique molecular stability and metabolic elasticity, configuring itself as the optimal biological choice for breeders and collectors wishing to isolate an elite mother or father plant to preserve over time or to use in hybridization projects to bring off-the-charts citrus scents and mental potency.
Karel’s Haze Regular in brief
This elite genetics features two main clearly isolable phenotypes: a faster-dominant one that concludes indoor flowering in just 8-10 weeks (56-70 days), and a more Haze-oriented one that can extend up to 12-14 weeks. Indoors, under proper environmental management, it ensures massive, stable harvests estimated between 400 and 500g/m². Outdoors, it expresses overwhelming productivity, consistently exceeding 500-600g per dried plant.
THC levels are exceptionally high (20-25%), delivering a clear, powerful, and long-lasting psychoactivity. Post-switch vertical elongation is marked, capable of doubling or tripling the initial height of the vegetative phase. The olfactory profile is a citrus and balsamic symphony: a penetrating mix of fresh lemon, lime, diesel, ancient incense, and exotic spices.
Technical Sheet
- Genetics: Old School Haze x Super Silver Haze.
- Type: Sativa-dominant hybrid (70% Sativa / 30% Indica).
- Flowering: Variable between 8-10 weeks and 12-14 weeks depending on the phenotype.
- Harvest: Mid-to-Late October (Outdoor / Greenhouse).
- Height: 110-150 cm (Indoor) / over 200-250 cm (Outdoor).
- Cannabinoids: THC 20-25%, low CBD.
- Terpenes: Limonene, Terpinolene, Myrcene, Pinene.
- Yield: 400-500g/m² (Indoor), 500-600g per plant (Outdoor).
- Techniques: Intensive SCROG, Super-cropping, Low Stress Training (LST), Phenotypic selection.
- Extracts: Legendary and golden return in Live Rosin and Water Hash extractions with a very fresh citrus terpene profile.
Cultural Management (Indoor and Outdoor)
Indoors, Karel’s Haze demands space and a wise management of the aerial space. The post-switch stretch is heavily influenced by the sativa heritage; applying the SCROG or super-cropping technique across the branch plane is a non-negotiable necessity to level the canopy and distribute light evenly across the apical zone.
Nutrient absorption is intense and progressive: it prefers complete and high feeding schedules during the central phase of flowering, supporting an EC up to 1.6-1.8 at peak bloom, combined with a constant VPD around 1.3-1.5 kPa. Performing progressive cleaning of the dense lower aerial mass (lollipopping) is recommended to maximize airflow.
Outdoors or in greenhouses, this variety fully expresses its vigorous regular seed genetic heritage. It builds a titanic and extremely branched root platform that colonizes substrates, displaying fantastic tolerance to summer heat and high altitude winds.
Concluding flowering between mid-to-late October, the airy structure of its spear-shaped calyxes favors a natural internal resistance to botrytis, allowing the plant to expel autumn moisture without crop losses. The installation of sturdy mechanical stakes is mandatory to prevent structural breakages caused by late-season bad weather.
Terpene Profile and Effect
The organoleptic bouquet of Karel’s Haze is an authentic explosion of citrus freshness and aristocratic notes. During floral development, it floods the room with a penetrating and volatile scent dominated by lemon zest, lime, and bitter orange, immediately followed by a dense and chemical background reminiscent of diesel, gasoline, and ancient cathedral incense. On the palate, the smoke is ultra-fine, velvety, and leaves a lingering balsamic and citric aftertaste that remains for hours.
With THC levels steadily exceeding 22%, the effect is a pure psychoactive experience, entirely cerebral and free of physical crashes or heavy lethargy. It instantly triggers a surge of pure cerebral euphoria, cognitive clarity, and happy energy.
It lifts the spirit, instantly sweeps away mental fatigue, and stimulates creativity, focus, and talkativeness, proving to be the perfect daytime, social, and artistic variety par excellence. It does not weigh down the body, leaving the consumer in a constant state of active and motivating well-being.
Strain Comparisons
Karel’s Haze vs Kees’ Old School Haze
Kees’ Old School Haze is a 100% pure sativa requiring up to 14 weeks, offering airier buds and a strictly psychedelic and incensed effect. Karel’s Haze significantly shortens times in fast phenotypes (8-10 weeks), increases bud density, and introduces a distinctly more citrusy, fresh olfactory profile dominated by limonene.
Karel’s Haze vs Silver Haze (Sensi Seeds)
Silver Haze offers slightly more compact and hard calyxes due to the Northern Lights component, with a hybrid effect that fades into physical relaxation at the end. Karel’s Haze guarantees a cleaner, more active, and electric sativa cerebral drive, a sharper citrus profile, and the unchanged biological value of the regular seed.
FAQ
Being regular seeds, how do I identify males?
It is necessary to carefully monitor the nodes in the apical zone during the first two weeks after switching to 12/12. Males develop small clusters of smooth spheres (pollen sacs), while females produce tear-shaped calyxes with two hair-like white pistils. Isolate males promptly to avoid accidental pollination.
How many vegetative days does it require indoors?
Given the vigorous post-switch stretch, it is recommended to limit the indoor vegetative phase to just 3 weeks, or to switch directly to a 12/12 photoperiod from seed to contain canopy height within perfect limits.
How long should the root flush last?
An accurate and deep root flush of at least 14-18 days with pH-balanced water only is recommended to eliminate mineral residues from the substrate and allow the pure lemon and incense flavor to express itself without any harshness in the smoke.
Annibale Seedshop’s Opinion
Karel’s Haze Regular by Super Sativa Seed Club is an authentic masterpiece for lovers of citrus flavor and great sativas. Our team highly recommends it to those looking for a regular genetics of the highest agronomic level to select an elite mother or father plant with an off-the-charts citric profile and an electrifying effect. A proud, generous, and extraordinarily complex genetics that will not disappoint the expectations of the most demanding jars.
