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| Weight | N/A |
|---|---|
| Genetic Type | Hybrid |
| Harvest Time | 8-10 Weeks |
| Harvest Yield | 400-500g/ m2, 500-600g / m2 |
| Seed Gender | Feminized Seed |
| Seedbank | Green House Seeds |
| THC | High THC (20%), Mid THC (15%), Very High THC (25%) |
| Where to Grow | |
| Country | Dutch |
| Effect | Creative, Energetic, Muscular, Relaxing, Social |
| Genetic Family | Haze, Skunk |
| Quality | Annibale's Choice, Bestseller, Easy to Grow, Most Productive |
| Taste and Smell | Lemon / Citrus, Pine / Wood / Balsamic, Spices / Incense / Cheese |
The Jack Herer Feminized by Green House Seeds represents an invaluable genetic pillar, a complex hybrid that requires careful cultural management but yields top-tier floral quality. Born from a multi-way cross between Haze, Red Skunk, and Northern Lights #5, this cultivar expresses a vigorous vegetative push and a flower structure that blends the typical density of indicas with the elongated geometries of sativas. Its architecture demands precise spatial planning to manage transpiration and the massive aerial volume.
This variety is a sativa-dominant hybrid characterized by a flowering cycle of 8-10 weeks and an indoor yield potential that ranges between 400 and 600g/m². Laboratory tests show a THC content that easily reaches 20-25%, with negligible CBD.
The marked vertical elongation requires early containment interventions. The terpene profile is dominated by terpinolene, pinene, and caryophyllene, delivering pungent notes of spicy wood and citrus. Ideal for outdoor cultivation in greenhouses or at high altitudes, it shows excellent resistance to temperature fluctuations, as documented in numerous guerrilla setups.
The lineage of Jack Herer is among the most documented and analyzed in the cannabis landscape. As traced by the phylogenetic archives of Seedfinder, the breeding work merged the overwhelming energy of the original Haze lines with the compactness and phenotypic stability provided by Northern Lights and Skunk. Green House Seeds’ objective was to isolate the fastest and most productive phenotypes without sacrificing the characteristic vegetative vigor. A genetic that transforms vertical push into floral density, offering unstoppable volumetric growth.
Inside the grow room, space management is crucial. Vertical elongation during the first three weeks at 12/12 can triple the plant’s size. It is essential to apply LST (Low Stress Training) techniques from the vegetative phase to widen the branch plane and level the apical zone.
The plant responds very well to nutrition but is sensitive to nitrogen excesses: EC should hover around 1.4-1.6 in the transition phase, then rise to 2.0-2.2 with a massive supply of phosphorus and potassium from the fifth week, necessary to fill the floral lances. Maintaining a VPD of 1.2-1.4 kPa will help optimize calcium and magnesium uptake, preventing deficiencies on the upper leaves.
Outdoors, this genetics demonstrates remarkable versatility. Its roots quickly explore the soil, building a massive root structure that supports a thick, woody main stem. Several technical reports on GrowDiaries confirm the plant’s excellent tolerance to high altitude conditions and cool early autumn nights, which actually favor resin production.
However, the intense density of the calyxes requires adequate ventilation: in very rainy areas, it is advisable to monitor the inside of the largest buds to prevent pathogenic stagnation.
The aromatic bouquet of Jack Herer Feminized is a timeless classic, defined by a pungent complexity. Terpinolene plays the main role, introducing a fresh, almost chemical and piney base, which immediately clashes with the spicy warmth of caryophyllene.
During the final weeks of flowering, the growing environment is saturated with a sharp odor of sandalwood and fermented citrus. With a slow, low-temperature cure, the earthy notes of the Skunk base emerge, giving the dried flower a lingering aftertaste that is particularly appreciated in solventless extraction processes.
Characterized by THC concentrations that easily exceed 20%, the somatic and mental experience offered by this variety is distinctly oriented towards clarity. Users perceive it as a powerful cognitive stimulant, capable of favoring concentration and lateral thinking. It is traditionally associated with daytime use, highly appreciated by those who wish to maintain a high level of social interaction or dedicate themselves to creative tasks. Muscle relaxation arrives only in the final stages of the effect, always remaining at a functional level that does not compromise productivity.
The most common agronomic error with this genetics is an excess of nitrogen in full bloom. The plant will quickly show burnt tips (“clawing”) and slow down calyx development. Another fatal risk is failing to manage the aerial mass: leaving too many weak secondary branches in the undergrowth will drastically reduce the final weight of the main buds. Finally, early harvesting must be avoided; harvesting before the trichomes show at least 10-15% amber means sacrificing the final density of the flower.
While Super Silver Haze shows even more extreme elongation and maturation times exceeding 11 weeks, Jack Herer offers a slightly more compressed cycle and a more solid, heavier flower structure, typical of its Northern Lights branch.
Amnesia presents a terpene profile dominated by pure limonene and a distinctly more disorienting effect. Jack Herer, conversely, keeps the user clear-headed and focused, with a rounder aroma geared towards spicy pine and earth.
White Widow produces less vegetative volume and adapts better to SOG setups without training. Jack Herer strictly requires manipulation to control vertical space but rewards with superior apical yields.
This cultivar is strongly discouraged for indoor growers with limited height (under 160 cm) who are unfamiliar with bending or pruning techniques. From an effects standpoint, it is not recommended for those seeking deep sedation or evening relaxation to promote sleep, as the prolonged cerebral push would be excessively stimulating.
A standard 18/6 cycle is recommended. Given the rapid growth, LED modules with a good blue spectrum will help keep the internodes slightly closer together.
The transition to flowering nutrition should happen gradually between the second and third week after the flip to 12/12, to support the phase of strong vertical elongation.
The flowers are dense, so the risk exists in the concluding weeks. It is crucial to keep the relative humidity below 45% in the last 15 days.
Absolutely. The resin quality and percentage return are excellent, especially if pressed at moderate temperatures (75-80°C) to preserve volatile terpenes like terpinolene.
It struggles in the first few weeks. It is recommended to amend outdoor soil with at least 30% perlite and coco coir to favor the oxygenation of the root system.
Jack Herer Feminized by Green House Seeds proves to be a formidable tool for those who grow with precision and method. It is a variety that does not hide its expansive nature, but which, if tamed through correct training practices and environmental management, produces harvests of absolute commercial caliber. Our team considers it a mandatory choice for those who want to study the structural dynamics of the great historical hybrids, guaranteeing an end product that fears no comparison in terms of yield and organoleptic complexity.
Far too numerous to mention on this page!
