Birrie Jack

Birrie Jack is a hybrid cannabis strain with up to 20.0% THC, known for its energetic effects and citrus and pine flavor profile.

Birrie Jack is a relatively rare autoflowering hybrid strain developed by Amaranta Seeds, combining Critical Jack genetics with Roadrunner autoflower traits. This strain represents an intersection of ruderalis, indica, and sativa genetics, creating a unique tri-hybrid composition. The strain is bred from Critical Jack (itself a cross of Critical+ and Jack Herer) and Roadrunner, which is an autoflowering strain containing ruderalis genetics from the Lowrider lineage. This genetic combination results in a sativa-dominant autoflowering variety that maintains much of the cerebral effects and citrus-pine flavor profile characteristic of Jack Herer genetics while incorporating the fast-flowering, compact growth traits of ruderalis genetics.

The strain exhibits typical autoflowering characteristics, requiring approximately 60 days from germination to harvest regardless of light cycle. Plants typically remain compact at 50-100 cm in height, making them suitable for both indoor and outdoor cultivation. Limited information is available about this particular strain in English-language cannabis databases, suggesting it may be a regional or boutique offering primarily distributed in European markets. The strain appears to have been developed specifically for growers seeking the energetic, creative effects of Jack Herer-type genetics in an easy-to-grow autoflowering format.