Silent Seeds presents here Critical Jack, a well-known line among cannabis growers. This variety combines ease of cultivation and high production with a premium harvest with a strong Sativa character. Now available in our feminised cannabis seeds catalogue at Alchimia Grow Shop.
This variety was developed using the same clones that created Critical Jack by Dinafem, combining Critical+'s fast and profuse flowering and Jack Herer's vigour and Haze character. It is a plant with explosive results in every sense of the word.
Critical Jack is composed of 60/40 Sativa Indica genetics, with vigorous, homogeneous, versatile and resistant plants. It offers good results in all conditions, also outdoors where it shows good resistance to insects and diseases, withstanding many pests.
Critical Jack, in indoor cannabis cultivation, is ready to harvest in about 60 days of flowering, with a yield of about 625g per m2 under optimal conditions. Outdoors the harvest is ready between late September and early October. It is a very vigorous plant, developing large shrubs outdoors. Silent Seeds advises to limit the vegetative growth period or prune it to control the final size indoors, as it shows a pronounced stretch when it goes into flowering.
Critical Jack's harvest consists of large, fleshy flowers with swollen calyxes covered in a sticky, terpene-rich resin layer. The flavour and aroma is dominated by a Haze character, with woody cedar, pine and incense notes, all accompanied by lemony hints on a slightly sweet and earthy background inherited from the Critical+ line.
Critical Jack produces a Sativa effect, stimulating and euphoric nature that promotes good mood, chatting and creative activity.
| Feminized Seeds | |
| Seed bank | Silent Seeds |
| THC Content | High (15-25%) |
| Indica/Sativa Genotype | Sativa +60% |
| Flavor | Sweet, Haze, Woody |
| Moisture/Mold Resistant | |
| Effect | Stimulating |
| Outdoor harvest | Fast (Late summer) |
| Indoor flowering | Fast (-9 weeks) |
| Indoor yield | High (500-600 g/m2) |
| Outdoor yield | High (400-1000 g/plant) |
| Genetics | Jack Herer, Critical |
| CBD content | Low (0-1%) |
Opinions about Critical Jack
Justus
I used high-stress training on my plants, and it worked very well for all of them. I took six cuttings from these plants for friends, and they also grew very well. A friend used low-stress training, and that also worked without any hermaphrodites. I'm very happy with the yield—thick and dense buds. The taste is fruity with a slight lemon note. The effect is so relaxing it puts me to sleep.
03-11-2025
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