Jack Herer (Sensi Seeds)

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Jack Herer was an American politician and cannabis activist. Sensi Seeds worked with him in the 80s and 90s to fight for worldwide cannabis legalisation. In the mid-1990s, Sensi Seeds developed a 50/50 hybrid strain and named it after him. Yes, you read it correctly. This is the real, unadulterated Jack Herer genetics. Not a fake. Buy these seeds for giant plants up to 3.5 meters tall and monster yields up to 800 g/m2. The Jack Herer strain was especially developed for indoor growing, but outdoors she grows fine too. Expect a complex, hash-like flavor. The combination of a cerebral high and uplifting body buzz is praised throughout the world. That's why this Jack Herer has won no less than 11 cannabis cups over the years. Order these seeds and experience cannabis super powers.

Info Specs Reviews

It must truly be an honor. To work with the world's most famous cannabis activist and then develop a strain with him that has taken the world by storm. Well done, Sensi Seeds!

Characteristics Jack Herer Strain:

  • The real Jack Herer strain developed by Sensi Seeds.
  • Large plants up to 3.5 meters tall
  • Specially developed for indoor growing, but can also be grown outdoors
  • Yields up to 800 g/m2
  • Won 11 different cannabis cups, including the Highlife Cup in different years, Social Clubs Cannabis Cup BCN, II Fresh Cup ES and Expo Seville Cup. 

Flavor and effects Jack Herer Weed

The flavor of the Jack Herer strain is very complex. Hashish-like aromas mixed with Afghan notes and a fruity skunk flavor. The effect is typical for a 50/50 hybrid like this. Jack Herer weed gives you an energetic, uplifting and cerebral high. This is accompanied by a stimulating body buzz. Jack Herer is officially recognized in the Netherlands as one of the few medicinal strains. Beware of its potency and long-lasting effects.

Growth and yield

This 50/50 hybrid displays many different phenotypes. They often lean towards the sativa side. Expect a strong growth spurt at the beginning of the growing phase. The buds of the Jack Herer strain are huge. They are covered with a thick layer of trichomes containing 20% THC. This lady has a flowering period of 10 to 12 weeks and you can harvest by the last week of October at the earliest. 

Jack Herer is actually specially developed for indoor growing. If you want to grow her outdoors, a warm summer is required. Still, there are plenty of cultivation reports from Western Europe that show huge plants with excellent yields. Yes, she can grow up to 3.5 meters tall if you take good care of her. Indoors she has an average height of one meter, but watch out for peaks. All in all, a monster yield of 800 g/m2 is possible.

Growing tips from Dutch-Headshop

Please watch out for mold at the end of the flowering phase if you grow outdoors in a temperate climate. The buds are huge, so they really need space and plenty of air circulation. Screen of Green (SCROG), supercropping and lollipoping will increase yields. 

Specifications Jack Herer Weed seeds:

  • Genetics: Jack Herer [Haze x Northern Lights]
  • Indica / Sativa: 50% indica, 50% sativa
  • Location: Growing indoors, growing outdoors and growing in a greenhouse
  • Flowering period indoors: 10-12 weeks
  • Month of harvest: October
  • Flavor: Complex flavor of skunky hash, Afghani notes and bits of fruit
  • Effect: Energetic and cerebral high combined with a body buzz (also medicinal)
  • THC: 20%
  • CBD: 0-1%
  • Seeds: 3 or 5 feminized seeds
  • Yield indoors (fresh): 800 grams per square meter under ideal conditions
  • Yield outdoors (fresh): 500 grams per plant under ideal conditions
  • Autoflower: No
  • Feminized: yes

*The above data are averages.

Use a Vaporizer

We recommend using a vaporizer for medical use, as well as recreational use. A vaporizer is a healthier way to enjoy cultivated plants. In our online store we have a huge range of high-quality vaporizers available directly from stock. They prevent tobacco from making you groggy and drowsy and, of course, from ingesting that harmful tobacco in the first place.

Sensi Seeds

Founded in 1985 and based in Amsterdam, Sensi Seeds is one of the founding fathers of the cannabis industry. It is also one of the world's largest seed banks with hundreds of strains of genetics. It created world-famous strains such as Jack Herer and Jack Herer. The company has done a lot of research on cannabis over the past four decades, actively contributing to normalizing cannabis use worldwide. The company behind HempFlax, the Cannabis College and the Hash Marihuana & Hemp Museum, among others, is convinced that the responsible use of cannabis can enrich lives and strives for global acceptance of the plant.

SKU G-3065
Availability In Stock
Brand Sensi Seeds
Family (Genetics) Hybrid
Type Mix
Gender and Autoflower Feminised
Indoor / Outdoor Indoor, outdoor and greenhouse
From seed to Harvest (Autoflower) N/A - Non-autoflowering
Average Flowering Time 9-10 weeks
Average height 100-150 cm
Maximum Height (approximately) 350
Harvest month Halfway through October
Difficulty Average
Effects Energetic, Medicinal, Uplifting
Mood Motivating, Get Creative
Taste Fruity, Hashish, Skunk
Max. Yield Indoor (grams / m2) 800
Max. Outdoor yield (gram / plant) 500
THC percentage (average) 20
CBD percentage (average) 0.10
Rich in CBG
THC:CBD Ratio More THC than CBD
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