Jack Herer

Quick Cannabinoid Profile | Average and Maximum Mass by Plant Weight

Jack Herer Qualities and Characteristics

Mental Aid
Anxiety disorder, Stress, Depression, PTSD, ADD/ADHD, Mood disorder, Lack of focus
Physical Aid
Migraines, Arthritis, Fatigue, Pain relief, Nausea
Northern Lights, Skunk, Haze
Type of High
Motivational, Cerebral, Uplifting, Creative, Energizing, Social, Focused
Light green
Fruity, Pine, Skunky, Spicy
Fruity, Pepper, Pine, Skunky, Spicy
Side Effects
Paranoia, Dry mouth, Dry eyes

Originally bred by Sensi Seed Bank in the mid-90s, Jack Herer is one of the most awarded strains in cannabis breeding history. This is fitting considering the contribution of its namesake to the cannabis community through decades of activism. Fruity and spicy in flavor, this slightly sativa-dominant hybrid provides a long-lasting, clear-headed and motivating high great for social activities or simply getting things done in a more pleasant headspace.

Cannabinoid Profile | Average and Maximum Mass by Plant Weight

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Analytical 360

Cultivation Info | Vetted methods to get the best from your bud

  • Indoor flowering time: 50-70 days
  • Indoor yield: 450 g/m2

Three of Jack’s four main phenotypes are heavily Sativa-influenced while the fourth has a growth pattern leaning towards Indica - fast-flowering and relatively compact with a dense, expansive, rounded bud structure that’s suited to cash-cropping. Jack’s Sativa phenotypes can also produce a good per-metre or per-plant yield when cultivated skilfully, though it is rare for these crops to be sold commercially. - From Sensi Seed Bank (original breeder)


If growing in soil, full ground is recommended over pots, which are usually too small. Dry climates, like Spain and California, are Jack Herer’s only reasonble candidates for an outdoor home. Growing Jack indoors is necessary in most parts of the world. Hydroponics will give quick satisfying results, but Jack Herer is best grown as bigger plants.


Apart from the normal considerations for growing a Sativa-hybrid – greater height-gain in flowering, longer flowering time, less need for high doses of nutrient – Jack Herer should present no problem to any grower with a some experience of indoor cultivation. Perhaps the only circumstance where Jack Herer might not be a recommended strain would be a person’s very first try at indoor growing – in which case no Sativa-heavy variety would be suitable. For growers who know the basics of indoor cultivation, for outdoor growers in warm and sunny climates and (especially) for growers who have mastered the art of cloning and maintaining their own mother plants, Jack Herer is an amazing strain that can delight and reward in equal measure. Outdoors in a climate like Spain’s, Jack Herer can grow to the size of a small tree over the spring and summer, producing a large harvest that’s worthy of any outdoor plant. Indoors, clones can be farmed intensively to produce great yields in small spaces. The height of Sativa-leaning phenotypes can be controlled by flowering very soon after rooting, and Jack Herer’s tendency to produce upward-growing branches means that plants often require less floor-space than Indicas and Skunks, whose lateral branches often compete for space. Properly maintained mother plants will produce clones for years with no decrease in quality or vigour. In the first year or two, many growers notice that their maturing Jack Herer mother plants display steady increase in the quality of clones and potency of buds they produce. Jack Herer has four main phenotypes, all of which display a mix of Indica and Sativa characteristics – even the tallest, longest-flowering Sativa phenos have larger calyxes and Indica density reinforcing their buds; the shorter, faster Indica phenos still possess a soaring high and often have Sativa ‘run’ to their flowers. Growers should not expect uniform plants when growing Jack Herer from seed. One of this strain’s outstanding features is that it allows the grower to choose a phenotype whose growing pattern fits their needs and preferences, while maintaining Jack’s near-psychedelic potency in whichever phenotype is chosen. When starting mother-plants from seed, many growers will take a clone or two from each plant as soon as it is big enough (25cm+), then flower those clones to determine the sex of the seed-plants they were cut from. In this way, males can be discarded at the earliest opportunity and the original seed-plants need not go through the stress of being flowered, then turned back to vegetative growth after the females are identified. Cloning and then flowering clones as soon as possible will also allow growers to get an early idea of the growth pattern and end-product to expect from each of the individual mother plants.


This one is a bit more difficult to grow than a lot of cannabis plants, Jack Herer cannabis is happier if you let it grow tall and requires plenty of patience during the flowering phase. Only try growing Jack Herer weed outdoors if you have a Mediterranean climate or better, and even then plant directly into the earth rather than in pots. Jack Herer marijuana is a plant that likes to grow.


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More Info | Everything else you need to know


The hybrid is named after hemp proponent Jack Herer, cannabis decriminalization activist, and author of The Emperor Wears No Clothes. Created by the Sensi Seed Bank in the Netherlands and was released as a seed strain in 1994, winning the 7th High Times Cannabis Cup in the same year.


High Times about the lineage: While Sensi say the exact lineage is a closely-guarded secret, it is accepted that Jack Herer is a 3-way hybrid of Skunk #1, Northern Lights #5 and Haze. The precise lineage is probably Haze x [Northern Lights #5 x (Northern Lights #5 x Skunk #1)] which suggests that Sensi began by selecting a male from their NL5 x SK1 seedline (AKA Shiva Skunk) and backcrossing him to the NL5 female cutting. As Sensi purchased Neville's breeding plants, they had both the Haze A and C males, so it is likely that they then chose a female NL5 x (NL5xSK1) plant and pollinated it with one of the Haze males to create Jack Herer., this would make Jack 50% Haze, 37.5% NL5 and 12.5% SK1. This gives Jack Herer a similar composition to Super Silver Haze and Mango Haze which are 50% Haze, 25% NL5 and 25% SK1.


Additional Information

Jack Herer is a prized sativa-dominant sativa/indica hybrid of Cannabis well known for both its cerebral high and its strong body high. The strain is a cross between Skunk #1, Haze, and Northern Lights #5.[1] Jack Herer is the parent to many subset strains. The goal was to make a 50 percent Haze cross that kept the properties of this top-rated sativa, while shortening the painful 6 month flowering time that a full-blooded Haze demands.


Awards    20


2nd High Life Cannabis Cup (Seed Bank Hydro Haze), 2nd High Life Cannabis Cup (Grow Shop Hydro Haze), 2nd High Life Cannabis Cup (Seed Bank Hydro Haze), 2nd High Life Cannabis Cup (Grow Shop Hydro Haze)


1st High Life Cannabis Cup (Coffeeshop Hydro), 1st High Life Cannabis Cup (Coffeeshop Hydro)


1st High Life Cannabis Cup (Seeds Haze Hydro), 1st High Life Cannabis Cup (Coffeeshop Hydro), 1st High Life Cannabis Cup (Seeds Haze Hydro)


1st High Life Cannabis Cup (Seeds Hydro), 1st High Life Cannabis Cup (Grow Shop Bio), 3rd High Life Cannabis Cup (Coffeeshop Hydro), 1st High Life Cannabis Cup (Seeds Hydro), 1st High Life Cannabis Cup (Grow Shop Bio), 3rd High Life Cannabis Cup (Coffeeshop Hydro)


3rd High Life Cannabis Cup (Coffeeshop Hydro), 3rd High Life Cannabis Cup (Coffeeshop Hydro)


1st High Times Cannabis Cup (Sativa Cup), 1st High Times Cannabis Cup (Sativa Cup)


1st High Times Cannabis Cup (Overall)