Seeds
Jack 47 F1 Fast Feminised Seeds
SKU: SS-JCK47-FAST-Fem
Potent and very fast.
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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
From the breeder
Potent and very fast.
Sweet Seeds breeder notesAroma
FruityMinty
Parental lines
Jack 47®Jack 47 Auto
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.
Brand/breeder
Parental lines
Jack 47® x Jack 47 Auto
Variety
Sativa dominant
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
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
Based on 6 reviews
Jack 47 F1 FAST Version Feminised Seeds
Great sativa cerebral smoke. More ill-tempered towards fertilizer, pests, and temps....
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Jack 47 F1 FAST Version Feminised Seeds
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!
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