Sensi Seeds

About Sensi Seeds

Ben Dronkers grew up in Rotterdam, spent his early twenties working on merchant ships travelling to Turkey, Afghanistan, Pakistan and beyond, and came back with both a love of travel and a fascination with cannabis in all its forms. He started experimenting with seeds and growing in the Netherlands in the late 1970s, a time when the Dutch coffee shop scene was just beginning to take shape and the genetics available were – by today’s standards – pretty limited.

By 1985, Ben had built up an extensive collection of seeds from his travels and breeding work, and launched what would become Sensi Seeds. He was working with American cannabis pioneers who had made their way to Amsterdam – figures like Ed Rosenthal and Sam the Skunkman – and obtained strains like Skunk #1, Northern Lights, Original Haze and Early Pearl that would go on to define an era. These aren’t just legendary names. Some of them are still in the Sensi Seeds catalogue today, now old enough that the growers who first grew them have grandchildren of their own.

In 1991, Ben acquired another seedbank – taking on its entire gene library and merging it with his own to form the Sensi Seed Bank we know today. The combined collection gave Sensi one of the most diverse and extensive genetic libraries anywhere in the world.

Beyond seeds, Ben founded the Hash, Marihuana and Hemp Museum in Amsterdam – now one of the city’s major tourist attractions – and HempFlax, a Dutch industrial hemp growing and processing company. He’s always been about more than just seeds. Sensi celebrated its 40th anniversary in 2025 – a remarkable milestone for any business, let alone one in an industry that has only recently started to go mainstream.

What’s in the Sensi Seeds Range?

Classic and Heritage Strains

This is the section of the Sensi catalogue that carries real history. Skunk #1, Afghani #1, Northern Lights, Early Skunk, Hash Plant – these are the strains that helped define cannabis breeding in the modern era. Growing them now means growing the same genetics that shaped nearly everything that came after. If you have any interest in cannabis history, this part of the range is genuinely worth exploring.

Feminised Seeds

Sensi’s feminised range builds on their foundational genetics to offer reliable, all-female results. Black Domina is a stand-out – a heavily indica-dominant strain with a deep, resinous character that’s been a Sensi favourite for years. LA Sugar and Tezla OG are more recent additions that show the breeding team haven’t stood still.

Autoflowering Seeds

Sensi’s auto range takes the classics and brings them into a faster-finishing format. Their autoflowering genetics are a good entry point for growers who want the Sensi quality but prefer the simplicity and speed that autos provide.

CBD and Medical Strains

Sensi Seeds has invested heavily in medical cannabis research and CBD breeding. The bank supports scientific research programmes and advocacy work in this space – it’s not a box-ticking exercise, it’s a core part of what they do. Their CBD range reflects that commitment.

Why Buy Sensi Seeds From SeedMasters.com?

Forty years of history don’t guarantee quality – but in Sensi’s case, they back it up. Here’s why SeedMasters.com is the right place to buy them:

• Free seeds with every order – every SeedMasters.com order includes free seeds as standard, no minimum spend required.
• Classic and modern Sensi genetics in one place – from the original 1980s strains to newer feminised and auto releases.
• Fast, discreet worldwide delivery – your order ships quickly and arrives well-packaged, with stealth delivery options also available.
• Helpful, no-nonsense advice – not sure which strain would complement your collection? Just ask our team.
• Trusted by many across the USA, Canada, UK and Europe.

Frequently Asked Questions

When was Sensi Seeds founded?

1985. Ben Dronkers launched the seedbank in Amsterdam, initially selling through mail order and then via a shop in the city centre. They celebrated their 40th anniversary in 2025 – making them one of the longest-running cannabis seedbanks in the world.

Who founded Sensi Seeds?

Ben Dronkers – a Dutch cannabis breeder, businessman and advocate who also founded the Hash, Marihuana and Hemp Museum in Amsterdam and HempFlax, an industrial hemp company. His sons Alan, Ravi and Gio have been involved in the business over the years too.

What are Sensi Seeds’ most famous strains?

Skunk #1 and Northern Lights are probably the two names most people know – both have been hugely influential on cannabis breeding worldwide. Afghani #1, Hash Plant, Black Domina and Early Skunk also have serious followings. All of these original strains are still available in the catalogue.

Are Sensi Seeds strains difficult to grow?

It depends on the strain. Their classic indica-dominant genetics – Afghani #1, Black Domina – are generally quite forgiving and a good fit for growers of all experience levels. The sativa-dominant strains, and anything with Haze genetics, tend to require more patience and experience to get the best from.

Does Sensi Seeds offer regular (non-feminised) seeds?

Yes – Sensi Seeds is one of the few banks that still offers a significant range of regular seeds alongside their feminised and autoflowering lines. This makes them particularly popular with breeders who want to work with male plants for their own breeding projects.

Is Sensi Seeds involved in medical cannabis research?

Yes. It’s been a core part of the brand’s identity for a long time – Ben Dronkers has been an advocate for medical cannabis and hemp for decades, and Sensi Seeds actively supports scientific research, advocacy groups and CBD development. Their medical and CBD range reflects this ongoing work.

Browse the full Sensi Seeds catalogue at SeedMasters.com – and if you’re new to the brand, the classics are a great place to start.