Strain Profile

Breeder

SENSI SEEDS

Cup Winner

Yes

Medicinal

Yes

Flowering Type

Standard

Yield

High

THC Content

Unknown

CBD Content

Unknown

Environment

Indoor, Outdoor, Greenhouse

Genetics

Mainly Sativa

Height

Tall

Flowering Time

9-11 WEEKS

Jack Flash #5

Product Overview

Jack Flash #5 Feminized provides the delicious rewards of Jack Herer with an ease of growing that is more usually associated with the Skunk family. The years of patient selection and refinement of the most desirable characteristics for a sativa-dominant variety intended to be grown inside have paid off many-fold with the release of cannabis seeds for Jack Flash.

Sex
  • Feminised
Select Pack Size
  • 1
  • 3
  • 5
  • 10

Available online

Price from £14.50
Availability: In stock

Same Day Dispatch Information

We will always strive to dispatch orders for special delivery placed before 10am on the same working day, however please note all orders are subject to our usual processing time of upto two working days. Quoted delivery time is from point of dispatch.

Free Cannabis Seeds

Everybody loves freebies right?

When you shop at the London Seed Centre you are guaranteed a minimum of one free seed with every order.

The more you spend the more free seeds you’ll receive bundled in with your order.

What’s more, our freebies are some of the most popular strains on the market provided by the most reputable manufacturers, so rest assured you won’t be disappointed!

Quantities and strains adjust with order size and value

Don’t forget to sign up to the London Seed Centre today to claim your seed chips for extra discounts on your orders, plus a load of bonus perks for being a valued LSC member.

*Kindly note that free seeds strains are subject to availability, and may be swapped out with different strains if they become out of stock. We alway do our best however to supply a strain of similar characteristics to the seeds on your order. Thank you for understanding.

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Product Overview

Jack Flash #5 Feminized is a 65% indica and 35% sativa strain. It’s a blend of Jack Herer, Super Skunk, and a Haze variety. This results in a plant that’s robust, easy to grow, and capable of producing large yields. Jack Flash #5 Feminized has a strong, earthy aroma, with hints of pine and citrus fruit. It can be kept relatively compact indoors, but can grow to heights of 250 cm outside. The high is uplifting and cerebral.

Jack Flash #5 Feminized is a skilful blend of Jack Herer (one of Sensi Seeds’ most popular strains), a Super Skunk and a Haze. This results in a 65% indica, 35% sativa that produces bumper harvests, while being easy to grow. Thanks to the sativa influence, the plants can sometimes reach towering heights, though can be kept more compact indoors. The high is reportedly happy, stimulating and euphoric.

Jack Flash #5 Feminized cannabis seeds are 65% indica, 35% sativa. The strain was developed by Sensi Seeds, using the popular Jack Herer genetics, combined with a Super Skunk and a Haze variety. It presents itself in two phenotypes; one that is more typically indica (compact, stocky, with large buds), and one that’s taller, and requires more room to flourish.

This is the feminized version of the strain. As such, the seeds are very unlikely to produce male plants, which makes cultivation much easier. This is beneficial for those that aren’t looking to produce seeds of their own, and who want reliability and predictability during cultivation. Jack Flash #5 Feminized has a relatively short flowering time of 55 to 75 days. The phenotype that’s more skunk-like in personality tends to be shorter. When grown in optimum conditions indoors, its height can be limited to around 100 cm. The taller phenotype produces much better results when given room to grow. Outside, these plants can reach heights of 180 to 250 cm (indoors, up to 180 cm).

Structurally, both phenotypes differ quite significantly. The sativa-type is slender, with thin lateral branches. These branches are densely covered in weighty buds, which take on the classic spiral formation. The indica-type is squatter and bushier, with huge, fat calyxes.

Jack Flash #5 Feminized is a big yielder, which is a major draw for growers. Outside, plants reliably produce around 600 grams each, which is a sizeable harvest indeed. Towards the end of the flowering period, the buds are heavy, massive and coated in resin.

This strain performs best in countries with long, warm, sunny summers, such as those in the Mediterranean. The plants also grow well inside, or in a greenhouse. The indica phenotype is ideal for the SOG (Sea of Green) system, though growers report good results from SCROG (Screen of Green), lollipopping, and supercropping too.

Jack Flash #5 Feminized is a 65% indica and 35% sativa strain. This blend really comes out in the high, which users claim is stimulating, cerebral and happy, whilst having a relaxing effect too. There’s also a mild psychedelic aspect to this strain, and it often promotes a sense of chattiness and thoughtfulness. As such, it’s well suited to social occasions.

The aroma of the growing plants is fairly noticeable; a distinctive pine scent, with undertones of citrus and earth. This is particularly evident after the buds are cured, and can also be detected in the taste.

MORE GOOD REASONS TO SHOP AT THE LONDON SEED CENTRE
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London Seed Centre Order Delivery Information

At London Seed Centre, we aim to provide fast and reliable shipping for all our customers. Please note that all orders are subject to a processing time of up to two working days, and quoted delivery times apply from the point of dispatch.


UK & Northern Ireland Shipping Methods

Standard Recorded Delivery™ (3-7 Working Days From Dispatch)

Delivered within 3-7 working days.

Includes online tracking and proof of delivery.

Royal Mail Signed For™ 1st Class (2-5 Working Days From Dispatch)

Aims to deliver within 2-5 working days.

Includes online tracking and proof of delivery.

Special Delivery Guaranteed Next Day™ (From Dispatch)

Next-day delivery from the date of dispatch.

Confirmation email and tracking number provided upon dispatch.

Free Delivery for Seed Orders

Orders over £50: Free standard recorded delivery for UK seed orders.

Headshop Items Shipping Methods

Free Delivery

Orders over £50: Free standard recorded delivery for smaller, lighter items.

Orders over £100: Free standard recorded delivery for heavier, bulkier items. (Applies to headshop items only – excludes seeds and other items.)

Standard Recorded Delivery (3-7 Working Days)

Under 1kg: £5

1-3kg: £8

Over 3kg: £10

First Class Recorded Delivery (2-5 Working Days)

Under 1kg: £6

1-3kg: £10

Over 3kg: £12

Special Delivery Guaranteed Next Day™ (From Dispatch)

Flat fee: £15 (regardless of weight).


International Shipping

International Signed For™

Secure, tracked service available worldwide.

Items tracked until they leave the UK and in some overseas destinations.

Delivery Aims:

Europe: 3-10 working days.

Rest of the World: 5-15 working days. (Delivery times exclude day of posting, Saturdays, and Sundays.)


Further Information

Airsure®

Priority handling in the UK and abroad.

Generally 1 day faster than standard Airmail.

Delivery Aims:

Western Europe: 2-3 working days.

Eastern Europe: 3-4 working days.

Rest of the World: 6-7 working days.

Note: Delivery times are not guaranteed, and compensation is not available for delays or missing tracking.

Airmail

Reliable service for lighter international mail.

Delivery Aims:

Western Europe: 3 working days.

Eastern Europe: 5 working days.

Rest of the World: 5-7 working days.


Returns & Replacements

You can exchange an unwanted item for a replacement or store credit of the same value if the item is still in the original breeder packet and remains UNOPEN. We will not under any circumstances exchange or replace an open packet. NO REFUNDS.


RETURNS & REPLACEMENTS

You can exchange an unwanted item for a replacement or store credit of the same value if the item is still in the original breeder packet which remains sealed. We will not under any circumstances exchange or replace an open packet. Due to the nature of our products, we cannot give refunds. Kindly note that any items being sent back to us should be sent by recoreded delivery, and the tracking number sent to us by email to [email protected].

AGE VERIFICATION & LEGAL DISCLAIMER

Website Legal Disclaimer:

  • Age Limit: Access is restricted to individuals 18 years or older.
  • Content Notice: This site contains information on cannabis seeds.
  • Compliance Requirement: We do not sell seeds to anyone intending illegal cultivation.
  • Legal Responsibility: By entering, you confirm compliance with your local and international cannabis laws. Continuing implies acceptance of these terms.