Jack Herer Feminized Seeds

Jack Herer Feminized Seeds

Jack Herer Marijuana Seeds – History, Feminized, Auto-Flowering and Crosses

Amongst famous strains, Jack Herer is one of the most beloved as well as one of the most notoriously difficult to grow. Named for late cannabis activist Jack Herer, author of The Emperor Wears No Clothes and subject of the film “Emperor of Hemp” this strain was one of the first strains to make hybrid seeds wildly popular. It is a credit to breeder Ben Dronkers of Sensi Seeds that this strain remains one of the best hybrid seeds available so many years after its 1994 release.

About Jack Herer

True to its Haze heritage, Jack Herer is not cannabis for the uninitiated. Newbie smokers may find themselves overwhelmed by the powerful cerebral high that whisks them away after the first puffs. The soaring, giggly and often trippy mental effects are accentuated by a buzzing body stone for a package that is pure medicine for both mind and body.

Jack Herer Bud Many growers think that this is a difficult strain to grow, but the original breeder Sensi swear it is no tougher to handle than any normal  Sativa dominant strain. It is true that getting the very best from Jack Herer with good yields and high quality buds requires a little more of a professional approach, but anyone with some grow experience should be able to get decent results.

If you have a long, hot growing season like that of Southern Spain, Jack Herer will grow into a veritable cannabis tree and produce stunning yields outdoors.

Despite the difficulties it presents, a Jack Herer grow should be on every Sativa lover’s bucket list. The process is joyful as you watch the four distinct Jack Herer phenotypes develop in your grow room, and the resultant richly flavored buds with their unique hit are more than reward enough for your efforts.

History of Jack Herer Cannabis

Jack Herer cannabis has simple and touching history. It was bred by Ben Dronkers of Sensi Seeds in honor of his friend and famous marijuana activist, Jack Herer. Dronkers worked carefully over several years to produce this Sativa dominant strain. While Sensi declines to release the exact parentage of the original Jack Herer, it is speculated with some certainty that it is a 55% Sativa cross of Haze, Shiva Skunk and Northern Lights #5.

Since the original Jack Herer release in 1994, many other seedbanks have grown and bred Sensi’s strain. The end result is a large collection of strains going by the name Jack Herer. Many of these such as the strains from Vision and Green House are strikingly similar to the original, while others, like those from Bull Dog and BC Bud Depot have varied more widely.

Sensi holds the vast majority of the awards for this strain, and is widely acknowledged not only as the originator of Jack Herer, but also as the seedbank with the highest quality JH seeds.

“Hemp will be the future of all mankind; or there won’t be a future.”
Jack Herer

The man who inspired the exceptional Jack Herer strain was a pioneer of cannabis activism. He spent his life promoting the benefits of marijuana, not just in terms of its effects on the physical and mental health of smokers but its potential as a source of textiles, fuel and even food. Herer believed cannabis could literally save the planet.

Jack Herer the Cannabis Emperor Jack Herer celebrated many of facets of marijuana. He knew it as a mind-expanding drug which had the power to remind people of their creativity, humanity and their relationship to the rest of life on the planet, as a medicine with the power to ease pain and heal disease, as a renewable fiber to replace trees in the production of paper and as a fuel to eliminate our reliance on oil. In its last manifestation, as a source of relief from dependence on fossil fuels, cannabis would also put an end to conflict and bloodshed related to oil in the Middle East.

Industrial growing of hemp, distinct from medicinal and recreational marijuana plants in that is very low in THC, was outlawed under the U.S. Controlled Substances Act of 1970 because of its relationship to THC laden marijuana. While the current American government’s fear of recreational drug use prompted this ban, our nation’s forefathers strongly supported the growth of hemp:

“Hemp is of first necessity to the wealth and protection of the country.” Thomas Jefferson

“Why use up the forests which were centuries in the making and the mines which required ages to lay down, if we can get the equivalent of forest and mineral products in the annual growth of the hemp fields?” Henry Ford

Fortunately the efforts of cannabis activists such as Jack Herer are beginning to see fruition. Yet while medicinal or recreational cannabis use has been legalized in the majority of states, it remains restricted to grow hemp commercially in most. Fortunately, in December 2018 the Farm Bill 2018 was signed into law meaning that Hemp was removed from the schedule of classification, opening the way to much wider production.

Industrial Hemp Field Jack Herer argued that the reason for the industrial hemp ban and the other laws prohibiting the growing and use of marijuana are intentional acts by the United States Government in support of large-scale commercialization and as a source of power. If hemp is the wonder plant Herer believed it to be, legalizing marijuana in all its forms could be the impetus for a much larger revolution which could change the way we think, move and interact with the world around us.

Growing Jack Herer

Jack Herer is not very easy indoors mostly because of its massive size which is challenging to control and requires greater inputs of light and water. Unless you are an experienced grower who has handled large Sativa dominant or Haze strains before, you may choose to start off with a more manageable auto-flowering Jack Herer variety.

Jack Herer Auto-Flowering Variety  

Dealing with Massive Cannabis Trees

Cannabis Trees Outdoor Grow Jack Herer’s size is perhaps her most challenging quality in an indoor grow. You will do best to grow her in a room with tall ceilings and allowing her to stretch as much as she wants. If you have the right space you may actually find you can fit more Jack Herer plants than Skunk or Indica plants in the same space. These girls grow upward, stretching their many flowered fingers towards the sky, a shape which allows you to pack more in as long as you have the space for upward growth. The shorter, bushier Indica varieties require more horizontal growing space.


The Four Jack Herer Phenotypes

Growers should not expect to see uniformity in their Jack Herer plants. They grow in four distinct phenotypes: Phenotype A: A strongly Sativa dominant pheno, these plants will reach record heights in the grow room, stretching up to five times once flowering begins. But they also produce what are arguably the most potent of the Jack Herer buds. Identify them by their irregular, oversized calyxes, which will cover the top half of each stem and branch by the end of flowering.

Phenotype B: The most Indica-esque of the four Jack Herer phenos, B still doubles or triples its vegetative height during flowering. Yet it is the fastest phenotype, with a more compact growth pattern and heavy, resinous buds which cluster around the nodes. They do run partway along the stem. Typically the upper branches of this pheno will combine with the main stem, forming a large central cola. While all the Jack Herer phenos have the creative, soaring cerebral high, this one has a stronger physical component than the phenos A or C.

Phenotype C: This pheno is very similar to A, and many growers may not be able to distinguish the two, though Sensi lists them separately. These plants are strongly Sativa dominant, growing tall and slender with productive branches. The calyxes are not as long as those of A, but they grow outwards in a stringy fashion that gives the buds a spiky appearance. This trait means they generally produce the largest buds of the four phenotypes, though not necessarily the highest yields. The flavor is delicious- creamy, sweet and a little spicy. The high has a little extra energy to it.

Phenotype D: These plants produce dense, Indica like buds at each node but gain massive height during flowering. Since the calyxes don’t run up the stems like in phenos A and C this creates gaps in between nodes. This pheno makes up for it by producing ridiculous amounts of resin, and it offers a stronger physical body stone than the other phenos. There is considerably less branching in these plants as well, allowing them to be grown closer together. They also finish flowering quickly, making them easier to grow and manage.


Jack Herer is one of the most highly awarded strains on the market. In the world of cannabis competition it grows on a pedestal alongside the famous White Widow, Northern Lights and Super Silver Haze.

Sensi Seeds can claim nearly all of the original Jack Herer cannabis competition prizes. While other seedbanks have bred and made slight alterations to Jack Herer, the awards don’t lie: Sensi’s original strain is a power-house of near perfection that needs no alterations.
  • 2006: 2nd – High Life Cannabis Cup (Seed Bank Hydro Haze), 2nd – High Life Cannabis Cup (Grow Shop Hydro Haze)
  • 2005: 1st – High Life Cannabis Cup (Coffeeshop Hydro)
  • 2004: 1st – High Life Cannabis Cup (Coffeeshop Hydro), 1st – High Life Cannabis Cup (Seeds Haze Hydro)
  • 2003: 1st – High Life Cannabis Cup (Seeds Hydro), 1st – High Life Cannabis Cup (Grow Shop Bio), 3rd – High Life Cannabis Cup (Coffeeshop Hydro)
  • 2002: 3rd – High Life Cannabis Cup (Coffeeshop Hydro)
  • 1999: 1st – High Times Cannabis Cup (Sativa Cup)
  • 1994: 1st – High Times Cannabis Cup (Overall)
To check out more award-winning strains look at our Best Cup Winners page.


Don’t be too intimidated by the famous Jack Herer. Yes, the effects are powerful, but the high is such a bright, positive experience that you won’t be able to help yourself. You’ll be back for more. In the grow room the biggest challenge is Jack Herer’s size. The plants are more tolerant of feeding and lighting errors than you may think. If you can find the space for these big beauties, or feel confident in your cloning and training skills, give Jack Herer a try. More than anything, this strain demands your attention. Be patient and observant, and don’t burn them with your lights, and you should be rewarded with a high yield of resinous buds that will blow your mind.
Sativa Dominant
Seed Origin
Northern Lights X Skunk X Haze
Seed Breeder
Sensi Seeds
Auto Flower Seeds Available
Feminized Seeds Available
Grow Indoors
Grow Outdoor
Medium 400gm (14.1oz) per M2
Height Indoors
Height Outdoors
Flowering Period
8-11 Weeks
Harvest Outdoor
THC Level
High 15-20%
Stoned or High
Grow Difficulty
14: Including 2 X High Times Cup 1st places and 7 High Life Cup 1st places