jack flash seeds

Jack flash seeds

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  • Jack Flash #5 Feminised Seeds


Jack Flash #5 is derived from the Jack Herer genetic lineage. To create Jack Flash #5 Sensi Seeds used the most sativa pheno-type of Jack Herer and crossed it with Super Skunk and Haze. Following several generations of selection and back-crossing Jack Flash #5 was born. The result is 65% sativa, 35% indica.

The result of this breeding programme is a plant with many of the attributes of Jack Herer but one which is as easy to grow as a Skunk plant. During the feminisation programme it was then further crossed with an especially fruity male plant. The uplifting high lacks none of that of Jack Herer but with bigger, bulkier yields and unlike its ancestor this one has two pheno-types in place of four. The first is a tall, fast-growing sativa pheno that should be flowered early to restrict height where this might be something of an issue . Growers should aim for a finishing height of at least 100 cm. in order to harvest typically long, “running” sativa buds. The second is the indica pheno-type which is a shorter, stockier plant which is eminently suitable for SoG set-ups. The terminal buds of this latter pheno develop massively-swollen calyxes forming multi-pointed crowns at their tips.

Jack Flash #5 is suitable for indoor cultivation and also for outdoors too as long as the climate is war, dry and sunny. A Mediterranean climate is ideal for this. Indoors flowering takes between 55 – 75 days depending on the pheno-type and yields are very heavy. The aroma/flavour during growth is of lemon and this becomes much stronger when the buds are dried and adding notes of orange, bergamot (Earl Grey tea), mint and pine flavours.

The effect is of a powerful initial rush that sativa connoisseurs love so much tempered by the indica side. It levels out into an uplifting, cerebral high that is very social and good for conversation. It is also recommended for therapeutic usage being efficacious in the relief of stress, anxiety and depression.

Jack Flash #5 was awarded 3rd Place in the Overall Category at the High Times Cannabis Cup (HTCC) 2004 as well as winner of the Seed Company Hydro Category at the 2007 High Life Cup.


Breeder/Brand Sensi Seeds
Genetics Jack Herer x Super Skunk x Haze
Variety Mostly Sativa
Flowering Type Photoperiod
Sex Feminised
Grows Indoors, Outdoors
Flowering Time 55-75 days
Medical Conditions Anxiety, Depression, Stress
Medicinal Properties Yes
Taste / Flavour Fruity, Lemon, Mint, Orange, Pine
Effect Cerebral, Happy, Stimulating , Uplifting
Awards 3rd. Place Overall HTCC, 2004; Winner Hydro, High Life Cup, 2007;

About Sensi Seeds

There is no other seed bank in the world that has been coveted with more awards than Sensi Seeds. From the Highlife Cup to the Cannabis Cup, Sensi have achieved unrivalled legendary status in the seed bank world.

In the early 1970’s, the founder of Sensi, Ben, opened a clothes shop in the Dutch city of Rotterdam where he sold homemade clothing. A few years earlier, at the age of seventeen, he smoked his first joint. But it wasn’t until he began making regular trips to Turkey, Afghanistan and Pakistan to purchase textiles that he became aware of the plant’s versatility. He learned about hemp fibre’s suitability as, among other things, a textile and was given cannabis and cannabis seeds by local farmers. Ben discovered that the cannabis plant had so much to offer in spite of it being prohibited and vilified in all corners of the world.

It became one of his passions to collect cannabis seeds from Central and South East Asia and the Asian subcontinent. Back home in the Netherlands, he started to cultivate these seeds in order to learn more about the growth process of this very special plant.

At the start of the 1980’s, the first examples of innovative, stabilised hybrids, such as Haze and Skunk, arrived in Europe from the United States. Ben was one of a mere three Dutch cultivators who were granted access to these hybrids, which are considered an important blueprint for the development of European hybrids.

At the end of the seventies, Ben found out that cannabis seeds did not fall under the cannabis prohibition; it was only the plant that was prohibited and not the seeds. As it was not illegal to sell seeds, Ben reasoned that the production process should not be illegal either. He started his seed company after a lawyer confirmed this insight and in 1985 the Sensi Seed Club, also known as the Sensi Connoisseurs’ Club, came into being. Ben took over a company called the Seed Bank in 1991 and the gene libraries were merged to create the Sensi Seed Bank as we know it today.

Sensi Seeds search for cannabis genetics has never ceased in the last 30 years. Their dedication towards genetic preservation has also never diminished. To this day, Sensi are true to their roots and are now, more than ever, aware that the future of cannabis genetic research lies in its past, in the genetics that started it all.

Sensi genetics offer not only the high yield and range of effects people search for, they actually represent a part of Cannabis’ history.

With a host of award winning strains, it would be unwise to overlook Sensi Seeds, available to buy at Seedsman now.

Jack Flash #5 Feminised Seeds from Sensi Seeds for sale at Seedsman Shop Online. Get Free seeds with every order. Offering the best seeds since 2003.