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Alien Jack

Feminised

Alien Jack is a sativa-dominant hybrid that blends Alien OG potency with Jack Herer clarity for a bright, resinous profile.

Why choose Alien Jack?
  • Sativa-driven aroma
  • Greenhouse friendly
  • Dense trichome cover
THC 18-24%
CBD 0.5-1.5%
Lineage Alien OG x Jack Herer
Genotype Sativa-dominant hybrid
Difficulty Intermediate
Flowering 8-10 weeks
Height Medium to tall (80-160 cm)
Yield Medium-High (400-500 g/m² indoor)
Taste Pine, Citrus, Earthy
Seed Type Feminised
Climate Mild Maritime; Suited To Uk Greenhouse And Sheltered Outdoor Sites
Effects Uplifting, Creative, Relaxing
Environment Both

About Alien Jack

Alien Jack is a sativa-dominant hybrid bred from Alien OG x Jack Herer. It gives a lively head high with a calm body ease. The aroma mixes pine and citrus over an earthy base. You will find it suits daytime use and creative tasks. Growers in the UK often run it in a greenhouse to protect against damp weather. Indoor growers will get dense colas with good trichome production when they use training and steady feeding.

Grow Difficulty:

Growing Alien Jack requires intermediate skill and careful humidity control in damp British seasons. Many growers use a greenhouse to manage moisture in cities such as Bristol or Glasgow.

Flowering Time:

Flowering takes around eight to ten weeks indoors. That timing suits most UK seasons when you run plants in a greenhouse or pick sheltered outdoor sites in Cornwall.

Yield:

Yield is medium to high with good feeding and training. UK indoor growers often reach 400 to 500 g per square metre while greenhouse crops frequently produce more per plant.

Height:

Plants reach medium to tall sizes and often stretch during the bloom phase. That makes them well suited to average UK grow rooms and greenhouse benches in Leeds.

Environment:

Alien Jack performs well both indoors and outdoors when you protect it from prolonged rain. Scottish growers often rely on greenhouses or polytunnels to keep buds dry and healthy.

Climate:

Best climate is mild maritime with shelter from long wet spells, such as greenhouses in southern England and Cornwall. In cooler zones like the Scottish Highlands a greenhouse and earlier finishing help match the short season.

Frequently Asked Questions

Common questions about this strain, covering growth, effects, and suitability for UK conditions.

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Choose seed quantity
Selected: 5 Seeds
£53.33 £40.00
£8.00 / seed • You save £13.33
Accepted payment methods
100% Satisfaction Guarantee • Secured Payments
Urbanseedbank Support

Questions & Answers

Customer questions and answers from the Urbanseedbank team. Submit your own question and we’ll respond after review.

5 questions Answered posts are shown first.
Common question Posted by Urbanseedbank Answered
Q
I live in Edinburgh. Should I use a greenhouse?
A
Verified answer
Yes, a greenhouse helps keep buds dry through the wet autumn. It also lets you finish the crop earlier with less stress.
Common question Posted by Urbanseedbank Answered
Q
My plants stretch a lot in flower. Any tips?
A
Verified answer
Switch to wider training before the flip and use a SCROG net. That evens the canopy and reduces late stretch in small rooms.
Common question Posted by Urbanseedbank Answered
Q
What nutrient schedule do you follow?
A
Verified answer
I use a balanced veg feed for the first six weeks then a bloom formula through flower. I drop nitrogen late and boost potassium in the final weeks.
Common question Posted by Urbanseedbank Answered
Q
How do you prevent mould on dense buds?
A
Verified answer
Keep good airflow and maintain lower humidity during late flower. Inspect buds regularly and remove any small problem spots early.
Common question Posted by Urbanseedbank Answered
Q
Is flushing necessary before harvest?
A
Verified answer
I stop additives about ten days before picking to clean up the flavour. That helps with a smoother smoke and brighter aroma after curing.

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