Flowering Type

Early/fast

Parental lines

Haze x NL#5 x Skunk

THC content

High THC (16-24%)

CBD content

Information not available

Photoperiod flowering time

6 to 8 weeks

Yield indoor

High Yield (450-600gr/m2)

Plant size

Medium

Suitable climates

Cool, Dry, Hot, Temperate, Warm, Wet

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From the breeder

Aromatic, resinous strain with old-school flavours

Seedsman breeder notes

Aroma

PineySpicyWoody

Parental lines

HazeNL#5Skunk

Description

Aromatic, resinous strain with old-school flavours

Jack Herer is on of the most popular strains in the world having been name after the renowned cannabis & hemp activist. It has won numerous cups and awards. By crossing this with our fast parent we aimed to retain the taste and potency of the original Jack Herer yet decrease the flowering time. This strain will produce fast, aromatic buds covered in greasy trichomes faster than you know it, and the taste and flavour still resembles the old classic.

Characteristics

Brand/breeder

Seedsman

Parental lines

Haze x NL#5 x Skunk

Type

Indica / Sativa hybrid

Color

Light Green, Orange

Flowering type

Early/fast

Sex

Feminised

THC potential

High THC (16-24%)

Yield potential outdoor

High Yield (450-750gr/plant)

Yield potential indoor

High Yield (450-600gr/m2)

Plant size

Medium

Flowering time (photoperiod)

6 to 8 weeks

Northern hemisphere harvest

September

Southern hemisphere harvest

March

Suitable climate

Cool, Dry, Hot, Temperate, Warm, Wet

Aroma

Piney, Spicy, Woody

SKU

SMAN-JCKHR-FAST-FEM

Grow guide

Early/Fast outdoor timeline

Fast / Early strains keep the photoperiod growth pattern, but they begin flowering earlier and usually finish sooner — helping outdoor growers harvest before late-season weather becomes a problem.

Stage 1

Germination / Early Start

March – April

Wait for: warmer days, lower frost risk, stable spring weather

Watch for: cold snaps, excess moisture, slow early growth

Stage 2

Seedling / Transplant

May

Wait for: steady light, mild conditions, protected early growth

Watch for: transplant stress, pests, wind exposure

Stage 3

Vegetative Growth

June – July

Wait for: long bright days, healthy expansion, strong structure

Watch for: overcrowding, nutrient issues, insect pressure

Stage 4

Flowering

From late July

Wait for: first signs of bloom, good airflow, settled conditions

Watch for: humidity, mould pressure, poor weather

Stage 5

Harvest

From early September

Wait for: ripe trichomes, dense finished flowers, harvest readiness

Watch for: cutting too early, rain, bud rot

Indoor Early/Fast timeline

Fast / Early strains are most valuable outdoors, where earlier flowering and shorter bloom times help growers harvest before poor autumn weather. Indoors, their main benefit is a faster flowering phase than photoperiod versions.

Week 0

Germination

Healthy seedling emergence

Wait for: healthy seedling emergence

Watch for: overwatering, weak starts

Week 1–2

Seedling

Steady early growth

Wait for: steady early growth

Watch for: stretching, stress, excess moisture

Week 3–6+

Vegetative Growth

Desired plant size and strong structure

Wait for: desired plant size and strong structure

Watch for: overcrowding, uneven growth, training stress

6–10 weeks

Flowering Phase

Strong bud formation and steady flower development

Wait for: strong bud formation and steady flower development

Watch for: humidity issues, poor airflow, plant stress

Harvest

Harvest Window

Finished flowers and mature trichomes

Wait for: finished flowers and mature trichomes

Watch for: harvesting too early or pushing plants too long

Reviews

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Anonymous 16.02.2026

Flavour: Excellent

buyer

Big fan of seedsman! 2/3 seeds popped, one didn't make it.Jack is super resilient and a very light feeder, great choice for saving money on nutes. Strong genetics clones are thriving. 10/10 will run again in the future.

As described: YesExpected Yield: AboveRecommend to others: Yes

Christian Trombley 30.01.2026

Flavour: Excellent

buyer

Fast flowering, resilient, great with lst or hst. Smells of mangos and oranges. The vegative stage eas easy. Handles well with transplants

As described: YesExpected Yield: AboveRecommend to others: Yes

Anonymous 01.11.2025

Flavour: Excellent

buyer

All seeds germinated and grew aggressively. Some plants developed purple colors early on. Good hybrid auto.

As described: YesExpected Yield: ExpectedRecommend to others: Yes

Judith Schulz 25.06.2024

buyer

They weren't anything special. Not the seeds fault, photo sensitive seeds are the best.

Seedsman (28.10.2026): Thanks for your review. We do test seeds from all the batches of seeds that we sell - and only release for sale seeds that test over 95% germination - we are therefore very confident with the quality of the seeds that we sell. We also hold our suppliers to the same high standards. This said these are live products and competencies & environments vary so we try to help customers if they have issues. Please reach out to our customer service team to see what they can do to help, and check on our blog for our recommended germination techniques. Best Seedsman

Anonymous 18.06.2024

Flavour: Excellent Found Strain: Seedsman Website

buyer

I've always had good success with this strain from Seedsman.

As described: YesExpected Yield: AboveRecommend to others: Yes

Seedsman (30.10.2026): Thank you for your review! We really appreciate all those who take time to leave us feedback. We have done a lot of improvements to our website and the way we work. We now have a quicker, better website with products that are easy to find. An excellent, diverse range of the most exciting seeds, combined with what we aim to be, the best service. Our new customer service bot Barbara has just been released and can help all our customers on our website or social media answer any important questions on their order, the ordering process, or any grow questions. Our mission is to ensure our customers have no reason to shop elsewhere. We hope you like the direction we are heading in. Please come back and shop again soon and recommend us far and wide. Thank YOU! Best Seedsman P.S. in the USA we also now have clones available.

Please note that some customers choose to leave a rating without writing a review, and because of this the number of ratings will differ from the number of reviews.

Jack Herer Fast Feminised Seeds

Flowering Type

Early/fast

Parental lines

Haze x NL#5 x Skunk

THC content

High THC (16-24%)

Photoperiod flowering time

6 to 8 weeks

Yield indoor

High Yield (450-600gr/m2)

Plant size

Medium

Suitable climates

Cool, Dry, Hot, Temperate, Warm, Wet

Early/Fast outdoor timeline

Indoor Early/Fast timeline

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