Critical Jack Seeds

Dinafem Seeds
Feminized
Photoperiod
Spain

Critical Jack Strain Characteristics

Strain brand Dinafem Seeds
Strain Gender Feminized
Strain light cycle Photoperiod
Suitable for growing Outdoor, Indoor
Strain THC level 21%
% Sativa/ Indica/ Ruderalis 60% Sativa / 40% Indica
Strain harvest 2 oz/ft² indoors
42.3 oz/plant outdoors
Indoor flowering time 60 days
Strain outdoor finish Mid October
Strain height 118.1 inches outdoors
Strain effect A portion of vivacity and good mood
Genetics Critical+ x Jack Herer
Awards 1st Outdoor Sativa, UCLA 2016|1st Best Shatter, San Bernardino Hempcon Cup 2015
Critical Jack Strain Reviews
5.0
2 reviews

Customer photos 0

  • More reviews coming soon

Critical Jack is a feminized photoperiod cannabis strain developed by Dinafem Seeds as a cross between Critical + - a high-performance Sativa-dominant hybrid and Jack Herer – a strain that needs no introduction. This strain is popular across dispensaries around the world for its excellent flavour, vigorous growth and uplifting effect.

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Description

Critical Jack is a feminized photoperiod cannabis strain carefully cultivated by the team at Dinafem Seeds and is one of the most popular strains in the Critical family. If you’re looking for your next powerhouse strain but can’t decide? Look no further because Critical Jack is just right for you.

A Critical + – Jack Herer Hybrid

Growing this strain outdoors is recommended in warmer climates as this strain has a longer flowering period due to her Sativa-dominant genetic lineage. While she has excellent resistance to mould and pests due to her high resin-production, growing in a greenhouse will improve the quality of the harvest. Outdoor crops can be ready to harvest late September/mid-October while indoors this strain blooms in 60 days to yield up to 625 gm2 under a 600 W HPS or LED lighting. Here is some further information to help you make the most of your grow:

  • Medium to tall plant – excellent for both indoor and outdoor growing.
  • Max EC of water – veg: 1.4, flower: 1.8
  • Water pH – 5.8 – 6.0.
  • Best grown in 10 L pots with 70:30 coco coir/perlite mix.
  • Grow room temperature below 26 ˚C to preserve full terpene profile.
  • SCRoG arrangement recommended due to tall branches.

Critical Jack - Perfect for Extracts

This strain has an excellent resin production making this an ideal hash plant – perfect for those looking to make their own cannabis extracts. In fact, this strain won first prize at the 2015 San Bernadino Hempcon Cup in the ‘Best Shatter’ category owing to its irresistible flavour and euphoric, relaxing effect.

Written by
Ethan Cole
Cannabis cultivation expert and writer

Cannabis cultivation expert with over a decade of experience in indoor growing and grower education.

Reviewed by
Sylvia Johnson
Indoor growing expert and cannabis writer

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Customer ratings
5,0
Based on 2 ratings
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  • Top review
    avatar
    Mega Puff
    5
    27 November 2019
    27 November 2019
    • Advantages
      Top notch! It takes time to grow, but it's definitely worth it. Just like any other Dinafem strain.
    • Disadvantages
      takes a lot of time
    • General impressions

      It's a bomb! It makes me laugh even when I'm alone all alone

    0
  • avatar
    As if
    5
    25 August 2019
    25 August 2019
    • Advantages
      flowers really fast
    • Disadvantages
      none
    • General impressions

      Great strain with a Sativa effect, I didn’t feel any Indica in it at all. Jack finishes its flowering really soon as well as starts it! on 12/12 schedule it takes only 7-10 days. I used 20l bags with 17l of soil in them, 2 400W HPS. As a result, 700+ grams from 3 plants in several stages of harvesting - the bottoms needed a little longer to finish. Colas are so heavy, after a month of flowering
      they’re gonna need extra support 

    -3
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