Jack Herer Strain Regular SeedsSensi Seeds' award-winning Haze hybrid with four phenotypes
No reviews yet · be the first to review Jack HererThe Jack Herer strain is the Sensi Seeds classic named after the cannabis activist who wrote The Emperor Wears No Clothes. In regular form it grows male and female plants from a three-way hybrid usually traced to Haze, Northern Lights #5 and Skunk, and it throws several distinct phenotypes, so it suits growers who want to select a mother plant or breed. Females flower in about 50 to 70 days with a pine, pepper and citrus aroma.
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What is the Jack Herer strain?
Jack Herer is a sativa-leaning hybrid that Sensi Seeds in the Netherlands launched in 1994 and named after Jack Herer, the hemp activist and author of The Emperor Wears No Clothes. Sensi calls it a three-way hybrid and keeps the exact recipe private; most databases trace it to Haze, Northern Lights #5 and Shiva Skunk. Regular Jack Herer seeds grow males and females, and the females flower in about 50 to 70 days depending on which of the strain's four main phenotypes they lean toward.
Sensi Seeds' regular-seed page lists 50% sativa / 50% indica; AllBud calls it 80% sativa, and phenotypes range from Haze-like to indica-like.
Sensi describes four main Jack Herer types, from a stretchy, resin-heavy 70-day Haze type to a compact indica type that finishes in under 60 days.
Jack Herer strain specs
Jack Herer's figures come from Sensi Seeds' strain page and phenotype guide, SeedFinder, AllBud and Weedmaps. Regular seeds express the strain's full phenotype range, so flowering time and height spread wider than usual, and every number below describes female plants.
| Type | Sativa-leaning hybrid; Sensi lists 50/50, AllBud 80% sativa |
|---|---|
| Genetics | Haze × (Northern Lights #5 × Shiva Skunk) in most databases; Sensi keeps the recipe private |
| Bred by | Sensi Seeds, Netherlands; launched in 1994 |
| THC | About 15–26% (AllBud 15–24%, Weedmaps 21–26%); Sensi says it can exceed 20% |
| CBD | Low (no figure from the breeder) |
| Main terpenes | Terpinolene, caryophyllene, pinene |
| Aroma & flavor | Pine, pepper, earth, spice, lemon and orange citrus |
| Reported effects | Uplifted, energetic, creative, focused, happy |
| Seed type | Regular (male and female plants, roughly half each) |
|---|---|
| Flowering indoors | 50–70 days by phenotype; Sensi's regular page allows 10–12 weeks |
| Outdoor harvest | No fixed month published; needs a long, warm summer to finish |
| Height | Tall; Sensi's indoor phenotype heights run from 30–80 cm to 80–180 cm (1–6 ft), with strong stretch in bloom |
| Yield | Heavy (Sensi); one outdoor grower reports about 400 g (14 oz) per plant |
| Difficulty | Moderate; needs steady care and phenotype selection |
| Best methods | Sea of Green, SCROG, cuttings from a selected mother |
| Climate | Indoors, or sunny Mediterranean to tropical outdoor climates |
Where does the Jack Herer strain come from?
Jack Herer was bred by Sensi Seeds in the Netherlands, which released it in 1994 after several years of breeding and named it after Jack Herer, the hemp campaigner behind the 1985 book The Emperor Wears No Clothes. Sensi calls it a three-way hybrid and has never published the exact recipe. The version most databases give is Haze × (Northern Lights #5 × Shiva Skunk); SeedFinder also records a likely (Northern Lights #5 × Haze) × (Skunk #1 × Haze) pedigree, and High Times estimated it at roughly 50% Haze.
Jack Herer took first place at the High Times Cannabis Cup in 1994 and won the sativa category in 1999, and Sensi calls it the flagship of its range. Sensi still sells it as regular and feminized seed. The regular packs keep every phenotype and both sexes in play, which matters if you want to choose your own keeper plant or use a Jack Herer male in a breeding project.
What are the Jack Herer phenotypes?
Sensi Seeds describes four main Jack Herer phenotypes, and a regular pack can turn up any of them. Type A leans Haze, with long strings of swollen, resinous calyxes, a full 70 days of bloom and a stretch of five times its height or more. Type B is the most indica-like: compact, with a big central cola, and done in under 60 days. Type C resembles A but grows spiky, fuzzy buds and gives the most energetic effect, while type D sets dense buds at every node, stays around 30–80 cm indoors and has the strongest body stone.
Keep the one you like. Because Jack Herer plants vary so much, many growers take a cutting from each female before flowering, then keep the best one as a mother plant.
What does Jack Herer taste like, and how does it feel?
Aroma and flavor
Jack Herer smells of pine, pepper and earth, with a lemony, orange-tinged citrus side on Haze-leaning plants, and AllBud reviewers compare the scent to a pine cleaner. Sensi notes that the full aroma develops after drying, so the plants stay fairly quiet in the garden.
- Pine
- Pepper
- Earth
- Lemon
- Orange
- Spice
Terpenes
- Terpinolene
- Fresh, fruity-herbal; Leafly lists it as dominant
- Caryophyllene
- A peppery bite
- Pinene
- Sharp, clean pine
Jack Herer's terpene balance changes with phenotype, so plants from one regular pack can smell noticeably different.
Reported effects
Jack Herer is mostly described as a clear, uplifting and energizing high, with creativity, focus and an easy, talkative mood, plus a body buzz that Sensi says is strongest on the indica-leaning phenotypes.
- Uplifted
- Energetic
- Creative
- Focused
- Happy
Jack Herer's reported downsides include dry mouth and, for people sensitive to sativas, anxious or racing thoughts; a few AllBud reviewers found it too intense.
These Jack Herer effects summarize user reports on AllBud, Weedmaps and SeedFinder plus Sensi Seeds' description. Everyone responds differently, and nothing here is medical advice.
How do you grow Jack Herer seeds?
Jack Herer regular seeds are a moderate grow with two extra steps: sex the plants and remove the males, then decide which phenotype fits your space before flowering the females under 12/12 for about 50 to 70 days.
- GerminateAbout 1 week
Start a few extra Jack Herer seeds. About half will be male, and you will want several females to compare.
- Vegetate3–6 weeks indoors
Sex the plants as pre-flowers appear. Sensi suggests flowering the stretchy Haze type small, from about 10–15 cm, and giving compact types a longer veg.
- Flower50–70 days
Expect strong stretch after the switch to 12/12; Sensi says even the compact type can grow 100–200% taller in bloom. Have a SCROG net or plenty of headroom ready.
- HarvestDay ~55–70 · Haze types last
Harvest each female when its own trichomes are ready. In one regular pack, the indica types can finish a week or two before the Haze types.
Grow tips for Jack Herer
- Remove males before they open. Jack Herer males shed pollen soon after their sacs split. Pull them early, or move a chosen breeding male to a separate room.
- Clone before you flip. Take a cutting from each Jack Herer female in veg, so you can keep the best phenotype as a mother once you've judged the finished buds.
- Size the plant to the type. Haze-leaning Jack Herer plants stretch hugely, so flower them small. The compact indica types can handle a longer veg.
- Use Sea of Green or SCROG. Sensi recommends both methods to raise the yield and keep the height of Jack Herer in check.
- Give it warmth and a long season. Jack Herer likes heat. Outdoors it suits sunny, Mediterranean-style climates far better than short, cool northern summers.
- Keep the trim. Sensi says resin coats the buds, leaves and even the stems of Jack Herer, so the trim is worth saving for hash.
Is Jack Herer the right strain for you?
Great pick if you
- Want males or pollen from one of the most famous breeding lines
- Like hunting through phenotypes to find a keeper mother
- Prefer an uplifting, creative daytime high with pine and spice flavors
- Have headroom, or are happy to SCROG a stretchy plant
Think twice if you
- Want every plant to produce buds (pick feminized Jack Herer)
- Need a uniform crop where every plant finishes on the same day
- Grow outdoors in a short, cool summer
- Are sensitive to racy sativa highs
Jack Herer strain FAQ
Is Jack Herer indica or sativa?
Jack Herer is a sativa-leaning hybrid. Sensi Seeds lists its regular seeds as 50% sativa and 50% indica, while AllBud calls it 80% sativa. Its phenotypes range from Haze-like sativas to a compact indica type.
Who was Jack Herer?
Jack Herer was an American cannabis and hemp activist and the author of The Emperor Wears No Clothes, first published in 1985. Sensi Seeds named the strain in his honor when it launched in 1994.
What are the parents of Jack Herer?
Sensi Seeds has never published the exact recipe and calls Jack Herer a three-way hybrid. Most databases list Haze × (Northern Lights #5 × Shiva Skunk), and SeedFinder records a likely pedigree of (Northern Lights #5 × Haze) × (Skunk #1 × Haze).
How long does Jack Herer take to flower?
Female Jack Herer plants flower in about 50 to 70 days, depending on phenotype. Sensi's phenotype guide puts the indica type at under 60 days and the Haze type at around 70, and its regular-seed page allows 10 to 12 weeks on average.
How many Jack Herer regular seeds will be male?
Plan on roughly half of a regular pack of Jack Herer seeds growing male, though any single pack can vary. Males can be removed once pre-flowers show, or kept apart from the females for breeding.
Why grow Jack Herer from regular seeds?
Regular Jack Herer seeds give you males for breeding and show the strain's full range of phenotypes, so you can pick the female that suits your space and taste as a mother plant. Feminized seeds suit growers who only want buds.
How much THC does Jack Herer have?
Jack Herer is usually reported at about 15–26% THC: AllBud gives 15–24%, Weedmaps 21–26%, and Sensi says it can exceed 20%. Phenotype, light and harvest timing all change the result.
Has Jack Herer won awards?
Yes. Jack Herer took first place at the 1994 High Times Cannabis Cup and won the sativa category in 1999. Sensi Seeds says it has collected many more cup wins since and calls it its flagship strain.
How tall does Jack Herer grow?
Jack Herer grows tall and stretches hard in flower. Sensi's phenotype guide gives indoor heights of 80–180 cm for the Haze type, 50–100 cm for the indica type and 30–80 cm for the most compact type.
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Jack Herer's relatives and similar strains
Jack Herer Feminized
Northern Lights Regular
Super Silver Haze Feminized
Neville's Haze FeminizedBeaver Seeds sells cannabis seeds for collection and genetic preservation where permitted. Check the laws in your state, province or country before germinating seeds. Effects are user-reported and are not medical claims.
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