Jack Herer


Jack Herer is one of the most famous and awarded Dutch varieties, flagship of Sensi Seeds. It is a powerful Indica/Sativa hybrid that combines Haze, Northern Lights #5 and Shiva Skunk. It is a hardy and easy to grow plant, with an average flowering period of 10-12 weeks. The buds are superlative, with excellent size, hardness, aroma, flavor and potency. It produces lucid, energetic and creative effects that will charge your batteries at any time of the day.

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Jack Herer is one of the most famous and cultivated strains of cannabis in the world, winner of multiple awards and cups. It is considered not only as one of the great Haze hybrids, but as one of the best varieties ever created.

It was born as a tribute from Sensi Seeds to their friend, the cannabis activist Jack Herer, author among other works of “The Emperor Wears No Clothes”, where he envisions a future less dependent on petroleum derivatives in favor of cannabis derivatives.

It is a combination of the 3 most influential strains which are Skunk #1, Haze, and Northern Lights #5. And the result is simply perfect. Years later, one of the breeders involved in its development would try to do the same in Greenhouse with the same parentals, giving birth to another legend like Super Silver Haze.

Since its introduction, multiple versions have emerged and the original Jack Herer has served as breeding material for new hybrids like the more than famous Critical Jack Herer.

How to grow Jack Herer

It is an easy plant to grow and it inherits from the Skunk a great resistance. But especially dominant are the sativa Haze genes which make it grow a lot.

Indoors, SCROG growing is ideal due to the speed at which it branches out and covers large cultivation areas. It is also perfect for SOG growing when a good mother is selected.

The flowering period is medium and it is harvested in about 10-12 weeks from when the photoperiod is changed. There is a rare Indica phenotype of very contained growth that is harvested in only 8 weeks.

Outdoors, if it is germinated at the beginning of spring, it has enough space and the conditions are favorable, growers usually get plants that reach 3 meters in height.

It is harvested between mid and late October, so it prefers climates with a dry autumn like the Mediterranean.

Characteristics of Jack Herer

The buds are huge, elongated, and very resinous. And also very fragrant. If grown indoors, we recommend a good carbon filter or ozonizer.

It has classic flavors and aromas of the old Dutch school, very herbal, spicy, and with suggestive hints of pine wood that everyone likes.

The effects are very, very powerful, you will be hit by a whirlwind of energetic, joyful, and very happy sensations that will keep you very high for long hours.

Yields are very high. Outdoors, it will be easy to reach 1000 grams per plant in those that reach a larger size. Indoors, with a 300-350 W LED setup per m², it is a variety that will reach up to 650 grams without a problem.

What we like the most

  • Very easy to grow.
  • Very high production.
  • Old school flavor.
  • Very powerful effects.
  • Its price.

What we like least

  • It is not suitable for areas with short summers.
  • It is very fragrant in flowering.

Frequently Asked Questions

Below we answer the most frequently asked questions from growers interested in these bulk cannabis seeds:

When does Jack Herer start flowering outdoors?

Depending on the latitude of the crop, flowering starts between early and mid-August.

When to cut an outdoor Jack Herer?

It is a medium flowering variety that is harvested from mid-October.

How to grow a feminized Jack Herer?

It is a plant with great Sativa dominance. Indoors, it is advisable to use some cultivation technique to control its growth.

What are the effects of bulk Jack Herer?

The effects are very potent and psychoactive. Energetic, happy, and joyful sensations will accompany you for hours.

Additional information




Indica / Sativa


Haze x (Northern Lights #5 x Shiva Skunk)



Recommended crop

Interior and exterior

Flowering time


Indoor flowering

70-84 days

Outdoor harvest

Mid / late October


Very High

Indoor production

450-650 g/m2

Outdoor production

800-1000 g/plant

Outdoor height

2,5-3 m

Aromas and flavours

Herbal, Pine, Spices, Wood


Creativity, Energy, Happiness


15% – 20%


Low: < 1%.


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