Critical Jack

Critical Jack :: Cannabis Strain Infos

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Official Information / Basics about Critical Jack from Dinafem

Strain Name
Critical Jack
indoor, outdoor
~60 days
Only female seeds.

Critical has become the most well-known and intensely cultivated variety of cannabis in Spain over the past two years. The cultivating revolution caused by the arrival of Skunk to the US, and later to the Netherlands, finally reached Spain 20 years later, but under another name: Critical. The reason is that the Skunk#|1 genetics are dominant in this strain, which is also composed of an Indica variety of Afghani origin, a highly productive strain developed on the west coast of US, and which received the name of Big Bud. Mr Nice Seed Bank commerced with this hybrid, naming it Critical Mass. We could say that they became the “godfathers” of the most popular genetics in the whole country. Thank you, Shantibaba, Neville and Mr. Nice! You’ve done an incredible job! We owe you a few words of recognition because thanks to your hard work (and that of a few others), we have been able to create a truly popular seed. And now, we are going to try again, this time crossing our Critical+ with the most productive sativa in our catalogue of mother plants – the only one capable of flowering in 70 days, producing up to 21% THC, and yielding a dry weight similar to indica or hybrid varieties.
The results are obviously convincing: 60 days of flowering are enough for a harvest of plants that have a really rapid growth. Their aspect is shabby like the sativa, with ample knots and very large light green leaves that hang limply. An explosion of flowers are produced, totally covered with large crystals of resin, in a much shorter period than one would expect with a sativa. Who do we have to thank? The most established seed bank in the world, Sensi Seeds. Our thanks to you, too, for this marvellous plant which is simply impressive. The crossbreed we have produced with these two elite varieties does not have the effect of a pure sativa, but it does have a fairly strong effect, the effect of the Critical+, fairly well-balanced; the modification increases its psychoactive side. It has an intense fruity flavour, but in some samples this varied to a lemony taste of wood. Very productive, even more than Critical+, an authentic flower producing machine, flowers which are very regular in size and homogenously placed on the branches –an heirloom received from its Critical+ side -. There is a clear increase in strength, in exchange for a few more days till flowering, so what more could we ask for? Well yes, there is something else. A noticeable increase in resistance against damp and fungus. Nevertheless, if the weather is too wet or climate conditions unfavourable, outdoor plants can be harvested at the end of September.
The result is guaranteed to surprise.

Flowering: 55 - 65 days
Outdoor harvests: from 30 September to 15 October
THC: Very high (14% - 18%)
CBD: Medium
Production: Very high
Outdoor height: Up to 3 metres
Composition: Sativa/Indica, 50%
Genotype: Critical+ x Jack Herer

User-Generated Strain-Profile

Known Phenotypes:
beta version - add an other phenotype
1.: short, compact, slowly blossoming, indica-dominant Phenotype #2
2.: long, stretched, fastly blossoming, sativa-dominant Phenotype #1

For this strain we got input by 7 user(s). Here a short overview:

Flowering Time Indoor: 59 - 68 days (~64 days)
Yield / Quantity Indoor: The crop of this strain is great.
General Impression Indoor: is all together extraordinary and quite recommendable.
Harvest Time Outdoor: Middle of April +/- 1 Week in BlArα climates.
Strength / Lasting Effect: The weed is strong and long lasting.
Yield / Quantity Outdoor: The crop of this strain is great.
General Impression Outdoor: is all together extraordinary and quite recommendable.
Votings of our users: Critical Jack gets 8.58 of 10 possible Points in the average!

Where to buy Critical Jack cannabis seeds?

Critical Jack from Dinafem is available as regular and feminized seeds. In 21 seedbanks, we found 74 offers between EUR 7.50 for 1 feminized seed and EUR 579.68 for 100 feminized seeds. If you are looking to buy Critical Jack Cannabis Seeds from Dinafem somewhere - have a look to our Critical Jack Price Comparison page with all current offers from all the connected seedbanks and shops - or visit one of the following tested, trustworthy and recommended seed-shops directly to check out their current Critical Jack offers: Cannapot Hanfshop, Indras Planet GmbH, Zamnesia, Canna-Seed Seed Shop, Seeds66, Discreet Seeds, Chu Majek, Oaseeds,, Hanfoase & Stecklingsexpress, Amsterdam Seed Center, Alchimia Grow Shop, Herbalist,, Herbies Head Shop, Green Parrot Seed Store, Linda Seeds | Linda Semilla, Germination Station,, Original Seeds Store and PEV Seeds Bank.

Strain Lineage / Genealogy

Crossbreeds and hybrids with "Critical Jack"

User-Comments about this strain:

at the 20.10.2017, 21:01:

High resin content. A slightly above average flavour being my only criticism.

The effect is mind blowing.. creative, thought pravoking and and very possitive. I must for people wanting to perform at there very best. Very sociable. This strain fires up the brain and makes you feel euphoric. Great for a meditation.

Dont pull too early as it can be an over stimulate and create anxiety/racy thoughts.

It may not smell or taste like the Cali strains but its better where it counts, in the head.. utter perfection.



at the 27.08.2017, 18:03:This comment is connected to a Plant-Profile!

bei diesem grow war die genetik nicht mehr so wie vor paar jahren. der jack anteil war großer wie der critical. alle 3 samen waren aber sehr identisch


at the 04.01.2017, 15:24:This comment is connected to a Plant-Profile!

great yield
i found a few distinct genotypes in the 20 seeds i cracked
no mould
fairly dense
the stretchier narrow leaf variety hits harder and is much more uplifting
excellent variety for both yield and quality


at the 14.05.2015, 16:10:

I liked the plants and the super hard bud shape, although the plants stay small after one pruning and don't drop too much. The finished product is actually not my coffee; The smell and taste is too hybrid, too plastique. The high is somehow nervous, racy and not really centered in the body, just putting on a brain lock after a period of smoking and increases sensory for anxiety. The high didn't comfort me at all, i actually stopped smoking this weed -- to get to the point :-)


at the 02.04.2015, 00:59:

Rock & Roll. Mir fällt nichts Negatives ein. Super Ertrag,Geschmack sehr gut – erinnert an eine Afghani, Schnee fällt ab der dritten Woche, 58 Tage 12/12. Nach dem Genuss braucht es erst mal eine Atempause,dann schiebt die Sativa mächtig und es kann sehr spacig werden. Absolut empfehlenswert. Die Photos im unten verlinkten alamn - Report treffen es voll, ich habe meine zwei immer wieder erkannt.


at the 27.01.2015, 17:45:

hatte eine bonus seed bekommen und gegrowt.der ertrag ist gut.die pflanze recht kurz und der lebenden pflanze ein beeriger,fruchtiger geruch.getrocknet mocht ich es dann nicht so,dann eher waldig,hölzern.der unterschied zum flagschiff von "dinafem"der _critical+ besteht darin,das die buds nicht ganz so fest nach dem trocknen sind,und natürlich auch der geruch.also ich fand die original -critical+ besser..der turn ist gut,tendenz eher sativa like..kein pic,sorry..


at the 31.12.2014, 12:25:This comment is connected to a Plant-Profile!

hab schon lange nicht mehr so harziges weed gesehen. fangen schon ab der 3 woche an damit, richtiges funkel an den buds. 3 seeds ein kurzer pheno dabei, der mir am besten gefallen hat. machen keine probs und vertragen gut dünger. schmeckt und knallt wie das "Jack Haze", was man früher immer in den coffeshops überteuert verkauft wurde ;)


at the 22.04.2013, 10:21:This comment is connected to a Plant-Profile!

good strain. very good yield..nice and compact flowers full of trichomes.pleasant smell and good leaf/calyx ratio...all in all good strain !!!


at the 15.04.2012, 04:36:This comment is connected to a Plant-Profile!

A favor:Cogollos lindos y grandes. Muy rápida en floración. Impresionante efecto high. Crecimiento vigoroso y fuerte.
En contra: Suceptible al ataque de hongos ( botrytis ) en exteriores húmedos.


at the 09.01.2011, 18:44:This comment is connected to a Plant-Profile!

Fantastic! Grows quick and strong, very resistant to stress and low humidity. Amazing will be very surprised!


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