Jack F1 Feminised Seeds
New strainBe the first verified buyer to review itJack F1 is a feminised, mostly sativa cultivar from Spliff Seeds, bred by crossing Northern Lights, Skunk #1 and Mexican Haze.
- CBD
- 6.00%
- Flowering
- 63–70 days
- Difficulty
- Hard
Jack F1 is a feminised, mostly sativa cultivar from Spliff Seeds, bred by crossing Northern Lights, Skunk #1 and Mexican Haze.
Based on breeder information and commonly reported characteristics—not medical advice. Individual experiences vary.
Jack F1 identity, cannabinoid profile, and breeder-supplied cultivation guidance.
Values are breeder-supplied estimates and may vary by phenotype and growing conditions.
Explore the aromatic compounds, flavour notes, and commonly reported characteristics of Jack F1.
Terpenes shape the strain’s aromatic direction and help describe its fresh, earthy, fruity, spicy, or herbal character.
No terpene profile has been added yet.


Sweet is a flavour reported for strains from different breeders, not one strain, a shared lineage or a guarantee that every product tastes like candy. Compare the breeder and full product details before choosing a seed pack.
Reported effects summarise how customers and breeders commonly describe the strain experience; they are informational and vary by person.
No reported-effect profile has been added yet.
Reported characteristics are not medical advice. Individual experiences vary.
Compare Jack F1 with more feminised cannabis seeds, browse sweet cannabis strains, or read the PrimeStrains genetics journal.
Jack F1 is a feminised, mostly sativa cultivar from Spliff Seeds, bred by crossing Northern Lights, Skunk #1 and Mexican Haze. Repeated rounds of careful back-crossing have stabilised its traits, so offspring look remarkably alike. Plants show an indica-style frame, yet their character is firmly sativa. The aroma offers sweet, spicy tones with a touch of cinnamon, and the flavour follows with a hazy finish. Resin is produced in heavy quantities, and the buds form chunky, compact clusters inherited from the Mexican Haze side. Flowering is photoperiod, typically nine to ten weeks, and outdoor harvests are generally in October. Plants grow tall, so they suit both indoor rooms and open-air gardens. Because the strain is vigorous and rated difficult to grow, it suits growers ready for a demanding plant. The high tends to stay with you for a good while, mostly in the head, with a warm physical sensation to follow.
Experiences from verified PrimeStrains customers.
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