Jack HererStrain, Effects, Genetics, Grow Guide & Where to Buy
Few cultivars carry the cult following Jack Herer has built across the US grow community , and the genetics live up to the reputation. It is a balanced hybrid (45% indica / 55% sativa) testing at roughly 18% THC, with a flowering window of 8-10 weeks from seed as an autoflower. What follows is a complete reference: terpene-led effects, genetic background, indoor and outdoor grow guidance, and the fastest way to get Jack Herer seeds shipped to your state.
Jack Herer Quick Stats
THC
18%
Indica
45%
Sativa
55%
Autoflower
Yes
Flowering
8-10 weeks from seed
Difficulty
intermediate
Indoor Yield
450-550 g/m²
Outdoor Yield
500-700 g/plant
Plant Height
60-100 cm
Jack HererEffects & Experience
The dominant effects of Jack Herer are focused, energetic, and the experience is more nuanced than a simple high/low/sedating label would suggest. Onset is gradual rather than abrupt, the peak holds for roughly an hour, and the comedown is smooth, which is why this strain shows up in so many "daily driver" lists from experienced consumers.
Growing Jack Herer
Growing Jack Herer fits guerrilla growers and balcony cultivators across all 50 states, since the plant ignores light cycle and finishes before fall rains arrive. Jack Herer runs on an 18/6 light schedule from seed to harvest, autoflower genetics ignore photoperiod, so there is no flip and no light-cycle change. Indoor yields land around 450-550 g/m² under quality LED, and outdoor plants given full sun and 5-7 gallon containers reliably produce 500-700 g/plant. Expected plant height is 60-100 cm, with intermediate cultivation difficulty. Practical tips that move the needle: feed cal-mag from week 2 onward at 2-3 mL per gallon, most reverse-osmosis and soft tap water setups need it; and defoliate strategically on day 21 of flower; remove fan leaves blocking interior bud sites without stripping the plant. The most common challenge growers report is late-flower humidity if your indoor RH climbs above 55% during the final two weeks.
Jack HererLineage & Genetics
Lineage: Haze x Northern Lights #5 x Shiva Skunk. That parental cross is the reason Jack Herer expresses the way it does, manageable height, balanced bud structure, and a flexible response to training. Our breeding line goes back to a verified mother, which is why phenotype consistency is one of the things customers mention most often in reviews.
Where to Buy Jack Herer Seeds in the USA
Jack Herer seeds ship from Royal King Seeds to all 50 US states with discreet packaging and a 95% germination guarantee. Average delivery is 3-5 business days, with the fastest routes typically reaching Alaska, Arizona, Arkansas, California, Colorado.
Jack Herer FAQ
Is Jack Herer indica or sativa?+
Jack Herer is a balanced hybrid with a 45% indica / 55% sativa split. The effects lean balanced, neither dominantly head nor body.
How long does Jack Herer take to flower?+
Jack Herer flowers in 8-10 weeks from seed from seed, since autoflower genetics ignore light cycle. Outdoor harvest typically lands 70-90 days after planting.
What is the THC content of Jack Herer?+
Jack Herer tests at approximately 18% THC when grown to its potential. Real-world numbers depend on grow conditions, harvest timing, and curing, well-grown phenotypes can land at the high end of that range, while poorly cured flower tests lower.
Is Jack Herer good for beginner growers?+
Jack Herer is rated intermediate difficulty. The autoflower genetics simplify the process, no light schedule changes and a fast seed-to-harvest timeline make it forgiving for first-time growers. Most growers with one harvest behind them handle this strain without difficulty.
Where can I buy Jack Herer seeds in the USA?+
Royal King Seeds ships Jack Herer seeds to all 50 US states with discreet packaging, 3-5 day delivery, and a 95% germination guarantee. The product page is at https://royalkingseeds.us/jack-herer-auto, checkout accepts standard cards, Apple Pay, and crypto.