Critical Jack is a popular feminised strain from Silent Seeds, created by crossing two legendary strains, Critical+ and Jack Herer. It is a sativa-dominant hybrid that offers fast growth, an excellent yield and a distinctive aroma and effect.

The aroma of Critical Jack is varied and pleasant, combining fresh lemon, crisp pine and floral notes. Its effects are energising and uplifting, making it particularly well suited to daytime use. THC usually ranges from 15 to 20%, giving a clear, euphoric and focus-enhancing effect.

Critical Jack is easy to grow, as it tolerates humidity and varied weather conditions well. The plant's open structure and abundant branching allow good light penetration, which improves the quality and quantity of the harvest. It suits indoor and outdoor cultivation alike.

Critical Jack is an excellent choice if you are looking for a strain that combines the best of classic genetics: a generous yield, fast flowering and an invigorating effect.

We sell cannabis seeds only to collectors, genetic preservation and ornamental purposes. The information we provide such as yield, smell or taste, etc. is only disclosed when this is important information to collectors and those purchasing seeds for other legitimate purposes.