Critical Jack is a 60% sativa cannabis strain that was bred by crossing Critical + with Jack Herer. It is a highly productive strain with high levels of THC.

Critical Jack is a cannabis hybrid of the highest quality. It is easy to grow, quite fast-flowering for a strain of this quality and can grow quite large outdoors. It is a prodigious producer that outstrips even Critical + for yields. Indoors a SCROG system is perfect as long as the veg. period is kept quite short otherwise its propensity to stretch could cause some issues. Here it can provide the grower with harvests of 625 gr/m² in 60 days of flowering. Outdoors, where it can reach 3 meters tall, it needs plenty of sunshine and warmth otherwise a greenhouse environment is recommended to fulfil its potential which amounts to up to 1200 gr/plant with harvest being late September / mid-October in the northern hemisphere. The overall appearance of Critical Jack can look a bit shabby as the light green leaves hang rather limply but this is nothing to worry about as you will see as soon as the explosion of flowers will show.

In terms of aroma and flavour you will find citrus fruit, incense, exotic wood and spices with some phenos emphasising the lemon/woody character. THC production is very high at 21% giving a very long-lasting, cerebral high.