Granddaddy Purple (aka Grand Daddy Purp, GDP) Strain Information (2024)

Granddaddy Purple (aka Grand Daddy Purp, GDP) Strain Information (1)

A classic strain that’s made its way around the globe since its inception, Granddaddy Purple is an Indica-dominant hybrid aptly named for its vibrant purple hues.

Colloquially known as Grand Daddy, GDP, and Granddaddy Purps, among others, this is one of those strains that almost everyone has heard about if they’ve been around the cannabis scene even for a short while.

Granddaddy Purple Strain Information

Born from a cross of two legends – Purple Urkle and Big Bud – Granddaddy Purple became an iconic breed due to its large structure and unique colors. It came to fruition around 2003, and at the time was known as one of the first 'super strains'.

Granddaddy Purple (aka Grand Daddy Purp, GDP) Strain Information (2)

Granddaddy Purple (aka Grand Daddy Purp, GDP) Strain Information (3)

Ken Estes, the creator of Granddaddy Purple, become involved with cannabis after a car crash resulting in paralysis. Becoming an influential figurehead in the medical cannabis scene, Grandaddy Purple became his holy grail strain, which led to the conception of the Granddaddy Purp Collective.

Awarded first prize in four competitions (Green Cup 2004, 2005, and 2006, as well as the Inglewood Healthcare Cannabis Cup in 2004), Grand Daddy Purp was ahead of its time, as not only is it a terrific smoke, but also has incredible genetics when it comes to growth.

Effects Of Granddaddy Purps

Granddaddy Purple (aka Grand Daddy Purp, GDP) Strain Information (4)

Credit must also be given to Granddaddy Purple’s terpenes, as the flavors, aromas, and effects from this iconic strain are overwhelmingly pleasant. Though it has Indica roots, people have found the high to be uplifting, smooth, and relaxing, complete with both mental euphoria and total body relaxation. These effects are compounded by the sweet smells and flavors from its genetics.

THC Level

Granddaddy Purple (aka Grand Daddy Purp, GDP) Strain Information (5)

While its potency is regarded as moderately strong by today's standards, back in the day, Granddaddy Purps genetics was known to be at the top chain, with THC levels of approximately 20-27%.

Medical Benefits

Granddaddy Purple (aka Grand Daddy Purp, GDP) Strain Information (6)

Ken Estes found cannabis to be extremely useful for medical purposes, and therefore set forth to breed a strain rich in therapeutic properties. Resulting in the wonder we know today as Granddaddy Purple, his creation was found to be perfect for alleviating chronic pain.

Due to the high THC levels, we wouldn’t quite say Grand Daddy Purps is the strain to use if you want to have a completely functional day. Rather, GDP is a solid choice for those looking to relieve swathes of pain or muscle spasms, or to reduce inflammation.

Grand Daddy cannabis strain is well-tailored toward an afternoon or evening smoke session to unwind from any veils of anxiety, tension, and stress, all the while still retaining the mental resolve necessary to cook dinner and remain somewhat functional.


Created from two genetic freaks, Big Bud and Purple Urkle, Granddaddy Purple became an instant hit among growing communities, and the grower behind the scene, Ken Estes, received critical acclaim for such a great plant.

Big Bud is still exceedingly common in modern times for its incredible yields and, well, big buds. Meanwhile, Purple Urkle was one of the first popularized strains to provide those beloved purple hues, serving as the foundation for Grand Daddy Purp’s famed appearance.

Nowadays GDP genetics have spread to many other strains, including but not limited to Grape Ape, GDP Diesel, and super-strains such as Z.
People often refer to Grand Daddy Purple as OG Grand Daddy, as it has become a staple in cross-breeding various super-strains – the grandfather of them all. In essence, GDP is the parent of hundreds, if not thousands of strains out there.

Terpene Profile

Granddaddy Purple (aka Grand Daddy Purp, GDP) Strain Information (7)

Granddaddy Purple’s terpene profile closely resembles that of grapes – fruity, floral, and citrusy. Usually dominant in myrcene, limonene, linalool, and both pinene variants, this composition translates into a pleasant smoke and a beautifully bright and sweet aroma right out of the jar.

Of course, your results will vary when it comes to growing this strain – we’d recommend looking into a variety of Granddaddy Purple seeds to find ones that match your desired results and grow situation.

Regardless, we reckon you’ll enjoy whichever seed bank you choose, as over the years, the genetics have become thoroughly refined. Further below, we’ve compiled a shortlist of the best Granddaddy Purple seeds for sale out there.

GDP Growing Tips

Granddaddy Purple (aka Grand Daddy Purp, GDP) Strain Information (8)

Yielding high quantities in approximately 60 days of flowering, growing Granddaddy Purp seeds has been well documented. Though the original flowers were grown outdoors in California climates, the vast majority of people now cultivate it with an indoor setup using either soil or hydroponics.

Starting off green and developing those purple hues as the plant matures, finalizing your crop too soon will result in a brighter terpene profile alongside a greener flower. Though many people find success with cold-climate growing at late stages to promote its purple colors, much of the appearance will depend on the genetics within your seeds.

Regardless, Granddaddy Purple genetics are phenomenal all-round, and something you definitely won’t regret growing.

Best Granddaddy Purple Strains

Granddaddy Purp seeds are extremely common, and seed banks around the world have adopted it with open arms.

Granddaddy Purple From Blimburn Seeds

Grandaddy Purple (BlimBurn Seeds)

  • Photoperiod
  • Mental explosion
  • 500 g/m² indoors
    450 - 500 g/plant outdoors
  • 25 %


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The Granddaddy Purple seeds that come from Blimburn Seeds have been found to yield extremely well with above-average THC levels. As result, these are some of the best Granddaddy Purple Seeds for both potency and yield.

Granddaddy Purple From Big Head Seeds

Grandaddy Purple (Big Head Seeds)

  • Photoperiod
  • A wonderful euphoria and the deep relaxation
  • 20 - 23 %
  • No official information


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On the other hand, the Grand Daddy Purple genetics from the Big Head Seeds selection have resulted in phenomenal terpene content, and are our #1 pick for GDP seeds in terms of aroma. Delicious flavors, powerful smells, and an incredible smoke – as you can tell, we’re very fond of these.

Grandaddy Black From Sensible Seeds

Grandaddy Black (Original Sensible Seeds)

  • Photoperiod
  • 23 %
  • Full physical relaxation
  • 600 g/m² indoors
    800 g/plant outdoors


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For that raw visual appeal, Grandaddy Black by Original Sensible Seeds grows to be incredibly rich with dark purple leaves. With oodles of bag appeal and a joy to watch mature, this one wins us over with its picture-perfect flowers.


For both smokers and growers alike, Granddaddy Purple marijuana strain is a big hit even today. Excellent genetics, a wholly pleasant smoke, and beautiful visual profile – no wonder it’s gathered such critical acclaim and won a handful of awards.

If you’re after a high-yielding flower that has resilient genetics and an excellent aroma, you’d be well suited to grow Granddaddy Purp seeds. There are a plethora of resources available online in terms of grow guides and tips, so even beginner growers will likely find great success with this strain.

Granddaddy Purple (aka Grand Daddy Purp, GDP) Strain Information (2024)


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