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Jupiter Jack

Feminised

Jupiter Jack is a sativa-dominant hybrid that delivers clear, uplifting effects with a steady body calm and good terpene complexity.

Why choose Jupiter Jack?
  • Bright cerebral high with a steady body feel
  • Perthshire-tested resilience for cool climates
  • Great terpene clarity after a careful cure
THC 18-22%
CBD 0.5-1%
Lineage Jupiter x Jack
Genotype Sativa-dominant hybrid
Difficulty Intermediate
Flowering 8-10 weeks
Height Medium; 1.2–1.8 m outdoors
Yield Medium to high
Taste pine, citrus, earthy spice
Seed Type Feminised
Climate cool northern summers
Effects uplifting, focused, gentle relaxation
Environment Indoor and outdoor; favours controlled indoor environments in Perthshire

About Jupiter Jack

Jupiter Jack is a sativa-dominant hybrid bred for clarity and reliable structure. It performs well under controlled indoor conditions and can finish outdoors in favourable sites, but it responds best to steady care. The profile leans to pine and citrus with an earthy spice, and users report uplifted focus followed by gentle relaxation. For growers in cool northern summers, attention to airflow, training and harvest timing keeps yields consistent.

Grow Difficulty:

This strain suits intermediate growers who can manage canopy shape and feeding. It tolerates cool northern summers but responds best to consistent attention to airflow and nutrients.

Flowering Time:

Flowering finishes in roughly eight to ten weeks under indoor lights. Outdoor finishing depends on the season and may be later in marginal climates.

Yield:

Indoor yields are reliable with sea of green or screen of green training. Outdoor plants can yield well if given a sheltered site and a long, dry autumn.

Height:

Plants develop a medium stature with several strong side branches when trained. Outdoors they commonly reach between 1.2 and 1.8 metres in a good season.

Environment:

In Perthshire growers often choose indoor rigs to control temperature, humidity and light. Outdoor crops in Perthshire need a sheltered, sunny aspect to avoid autumn rain.

Climate:

Growing Jupiter Jack in Perthshire requires attention to cool northern summers and possible late-season rain. Choose a protected outdoor site or favour indoor setups to secure a reliable finish.

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
How did your last Perthshire indoor run go?
A
Verified answer
I ran a small tent crop and dialled in feeding for the mid-range THC expression. Plants finished uniformly and the terpene profile was pronounced after a careful cure.
Common question Posted by Urbanseedbank Answered
Q
Did you spot any problems with cool nights?
A
Verified answer
Yes, cool nights slowed nutrient uptake so I bumped cation balance and raised day temperature slightly. That kept stretch normal and reduced tip burn.
Common question Posted by Urbanseedbank Answered
Q
Which training worked best for yield?
A
Verified answer
A combination of LST and topping before the stretch produced an even canopy. Using a trellis in flower helped support heavy colas.
Common question Posted by Urbanseedbank Answered
Q
What was your drying method this season?
A
Verified answer
I dried in a dark, ventilated room at 18–19°C and 55 per cent RH. After ten days I moved to jars and burped twice daily for the first fortnight.
Common question Posted by Urbanseedbank Answered
Q
Any tips for first-time growers in Perthshire?
A
Verified answer
Start small and focus on environmental control rather than maximal feeding. If growing outdoors pick the sunniest, most sheltered spot and be ready to harvest early if autumn turns wet.

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