Flowering Type

Early/fast

Parental lines

Jack 47® x Jack 47 Auto

THC content

High THC (16-24%)

CBD content

Medium CBD (1-5%)

Photoperiod flowering time

6 to 8 weeks

Yield indoor

High Yield (450-600gr/m2)

Plant size

Medium

Suitable climates

Cool, Dry, Humid, Temperate, Warm

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From the breeder

Potent and very fast.

Sweet Seeds breeder notes

Aroma

FruityMinty

Parental lines

Jack 47®Jack 47 Auto

Description

Potent and very fast.

Feminized and non-autoflowering version with an ultra fast flowering of one of the most potent strains of Sweet Seeds catalogue. This strain is the result of the cross between a selected genetic line of Jack 47 Auto and an elite clone of their Jack 47. The cross between the auto-flowering and the non-autoflowering strains originates a non-autoflowering genetic that shortens the flowering time by one week when compared with the original version of Jack 47.

This is a very powerful strain that produces exceptionally vigorous plants with thick buds that get fully covered by abundant resin during flowering. The taste and aroma of this strain is fresh and sweet, with tones of incense and flowers combined with lemony citrus hints.

Characteristics

Brand/breeder

Sweet Seeds

Parental lines

Jack 47® x Jack 47 Auto

Variety

Sativa dominant

Colour

Green

Flowering type

Early/fast

Sex

Feminised

THC content

High THC (16-24%)

CBD content

Medium CBD (1-5%)

Yield outdoor

Very High Yield (above 750gr/plant)

Yield indoor

High Yield (450-600gr/m2)

Plant size

Medium

Photoperiod flowering time

6 to 8 weeks

Northern hemisphere harvest

August, September

Southern hemisphere harvest

April, March

Suitable climates

Cool, Dry, Humid, Temperate, Warm

Aroma

Fruity, Minty

SKU

SS-JCK47-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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We found matching review(s) Clear filters

Charliann M. 23.04.2019

buyer

Little tricky, worth the effort. Great sativa cerebral smoke. More ill-tempered towards fertilizer, pests, and temps....

MadMark 24.07.2018

buyer

Very nice fast Sativa strain! With fast flowering time. She was started a week after another strain and she blew by the other strain, she started to change fast during flower and the flower Time is pretty much dead on, she is super frosty with a nice aroma. It was my first time growing so I was under feeding my girls in cocoa, but they bounced back when I up the notes and she loved them! Really nice smoke and great bag appeal. For sure recommend!

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 47 F1 Fast Feminized Seeds

Flowering Type

Early/fast

Parental lines

Jack 47® x Jack 47 Auto

THC content

High THC (16-24%)

CBD content

Medium CBD (1-5%)

Photoperiod flowering time

6 to 8 weeks

Yield indoor

High Yield (450-600gr/m2)

Plant size

Medium

Suitable climates

Cool, Dry, Humid, Temperate, Warm

Early/Fast outdoor timeline

Indoor Early/Fast timeline

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