Free UK Shipping over £99
Discreet Plain Packaging
079 3899 2670
0
£0.00
Search
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

Cactus Jack

Feminised

Cactus Jack a resinous hybrid that rewards careful greenhouse and outdoor management in the UK.

Why choose Cactus Jack?
  • High THC hybrid with clear lift
  • Performs well in managed greenhouse environments
  • Generous yields for intermediate growers
THC 22-28%
CBD <1%
Lineage JACK HERER x OG KUSH
Genotype Hybrid
Difficulty Intermediate
Flowering 8-10 weeks
Height Medium to tall
Yield High (up to 500 g/m² indoor, 300-500 g/plant outdoor)
Taste Citrus, Earthy, Spicy
Seed Type Feminised
Climate Humid Greenhouse
Effects Uplifting, Creative, Relaxing
Environment Both

About Cactus Jack

Cactus Jack is a high-THC hybrid bred from JACK HERER x OG KUSH that balances cerebral lift with physical ease. The plant suits greenhouse and sheltered outdoor sites, performs well under managed humidity and produces dense, aromatic buds with a citrus and earthy profile.

Grow Difficulty:

Growing Cactus Jack in humid greenhouse conditions needs vigilant ventilation and mould prevention. The overall difficulty is intermediate because the plant tolerates humidity but requires disease monitoring.

Flowering Time:

Flowering runs around eight to ten weeks depending on phenotype. Buds develop dense trichome coverage in the final weeks.

Yield:

Yield is generous when plants receive steady light and nutrition. In a well-managed greenhouse in Somerset you can expect high production per plant.

Height:

Plants reach a medium to tall height with a dominant central cola and useful lateral branching. The structure suits topping, low-stress training or sea-of-green.

Environment:

Indoors this strain responds well to SCROG and controlled feeding, and in Somerset growers often use greenhouses to extend the season. Outdoors it performs reliably in sheltered sites with good airflow.

Climate:

In Somerset this strain benefits from a controlled greenhouse set-up with careful humidity management. Humid greenhouse conditions demand dehumidifiers, strong airflow and regular mould checks.

Frequently Asked Questions

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

Verified buyer feedback

Grower Reviews

0.0
No reviews yet. Be the first to share your experience.
Help other collectors choose well Leave a rating, short review, and optional photos.

Customer reviews

Customer photos 0 uploaded

No customer photos yet.
No reviews yet Be the first to leave feedback for this strain.
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
My greenhouse is very humid, what immediate step should I take?
A
Verified answer
Increase ventilation and run a dehumidifier during the warmest hours; prune inner foliage to improve airflow.
Common question Posted by Urbanseedbank Answered
Q
Should I top Cactus Jack or leave it alone?
A
Verified answer
Top once or twice early to encourage multiple colas, but avoid major stress late in flowering.
Common question Posted by Urbanseedbank Answered
Q
What is a safe EC range for flowering?
A
Verified answer
Aim for 1.6–2.2 mS/cm in flowering depending on medium and plant response; adjust slowly and watch leaf tips for burn.
Common question Posted by Urbanseedbank Answered
Q
How do I handle a late-season rain risk outdoors in Somerset?
A
Verified answer
Move plants under cover if possible or build simple lean-to protection to keep buds dry and reduce mould risk.
Common question Posted by Urbanseedbank Answered
Q
Any tip for drying heavy buds from this strain?
A
Verified answer
Hang in a well-ventilated, dark space at 10-15°C and 50-60% humidity and avoid forcing the dry with heat to preserve flavour.

Ask Urbanseedbank

Short, product-specific questions get the best answers.