Close-Up View Of A Mature Cannabis Flower, Showcasing The Granddaddy Purple Strain Autoflower Seeds Potential For High-Quality Yields. Ideal For Autoflower Cultivation.

Granddaddy Purple Strain Autoflower Seeds

(5 customer reviews)

From $39.00

A Bay Area indica, Granddaddy Purple crosses Big Bud with Purple Urkle and carries layered grape and berry flavour through the smoke. The character is heavy and sedating, the sort of evening strain that keeps you in one chair. Buds colour up deep purple.

Autoflower seeds, 20% THC, 7 to 9 weeks of flowering, happiest indoors around 50% humidity. Free shipping over $99, sent discreetly to Canadian and US addresses.

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SKU: FEM-GRAPU-3-BIN2-1 Category:

Granddaddy Purple Strain Autoflower Seeds

Granddaddy Purple Autoflower Seeds is a true O.G strain with an impressive yield, heavy-hitting high that will have you on your couch in no time!

Is the kind of Indica one turns to when they need deep relaxation and recovery.

The strain originated in the Bay Area (San Francisco) and is a cross between powerful Big Bud X Purple Urkle. She’s since become one of California’s top cannabis strains due to her generous yields as well as layered fruity flavors that will keep you coming back for more!

Effects Of Our Granddaddy Purple Strain Autoflower Seeds

The way to beat stress is with this powerful, all-natural supplement. Made from berries and grapes it’s got enough mental healing properties for your daily needs. You can go about doing what matters most without worrying! The hunger-inducing effects help restore appetites. Also, give those suffering from insomnia or anxiety some much-needed rest at night time.

How Does Granddaddy Purple Strain Autoflower Seeds Grow?

The seeds are like a kind-hearted papa in the garden. They prefer to be indoors where humidity can be carefully monitored and kept at around 50%. Flowering time is slow–about 8 weeks for each layout although you will have some patience as it rewards between 14 – 17 ounces of sweet sticky vibrantly hued bud!

Number of Seeds

3 Seeds, 5 Seeds, 10 Seeds, 20 Seeds
Strain Type

Autoflower Seeds
Genetics

Purple Urkle x Big Bud
Indica / Sativa

Indica-dominant (~70% Indica / 30% Sativa)
THC Content

20% THC
Flowering Time

7-9 weeks

5 reviews for

Granddaddy Purple Strain Autoflower Seeds

  1. Avatar Of Brian S.

    Brian S. –

    Granddaddy Purple is a classic for a reason, and this autoflower version lived up to the name. The plant stayed compact indoors and produced thick, sticky buds with deep purple tones. The flavor is sweet and fruity grape-heavy and the effects are deeply relaxing. Perfect strain for nighttime use when you want to fully unwind.

    (0) (0)
  2. Avatar Of Heather J.

    Heather J. –

    This is one of the best indica strains I’ve grown so far. It really helps with stress and sleep. The high is heavy but comforting, not overwhelming. Growth was smooth indoors, and keeping humidity around 50% made a big difference. The Seed Pharm continues to deliver consistent quality.

    (0) (0)
  3. Avatar Of Mark D.

    Mark D. –

    GDP autoflower was easy to manage and rewarded patience. Flowering took right around 8 weeks, and the yield was impressive for an auto. The buds were colorful and dense with a strong berry aroma. Definitely a couch-lock strain, so I save it for evenings only.

    (0) (0)
  4. Avatar Of Olivia R.

    Olivia R. –

    I love this strain for recovery and relaxation. The hunger boost is real, and it helps me sleep through the night without tossing and turning. The grape and berry flavors come through beautifully after curing. If you’re looking for a calming indica, this is a great choice.

    (0) (0)
  5. Avatar Of Steven K.

    Steven K. –

    Granddaddy Purple from The Seed Pharm exceeded my expectations. Strong genetics, great color, and a heavy, soothing high. It’s perfect after a long day when you just want to relax and shut your brain off. Indoor grow was straightforward, and the final yield was more than satisfying.

    (0) (0)
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🌱 Granddaddy Purple Genetics & Lineage

Genetics

Purple Urkle x Big Bud

Type

80% Indica / 20% Sativa

Origin

California, USA (2003)

THC

17-24%

🍃 Granddaddy Purple Terpene Profile ▼
Myrcene: Earthy, grape — heavy sedation
Pinene: Pine, herbal — respiratory benefits
Caryophyllene: Spicy, peppery — anti-inflammatory

Flavor: Sweet grape and berry with earthy undertones
Aroma: Sweet grapes, berries, with floral and earthy notes

✨ Granddaddy Purple Effects & Medical Uses ▼
Primary Effects
Relaxed Sleepy Happy
Duration

2-4 hours

Onset

Gradual (15-20 minutes)

Medical Applications
Insomnia Chronic Pain Muscle Spasms Anxiety Lack of Appetite

Best for: Nighttime use, insomnia, pain relief, relaxation

🌿 How to Grow Granddaddy Purple Seeds ▼
Difficulty

Easy to Intermediate

Flower Time

8-9 weeks

Indoor Yield

450-550g/m²

Height

Short to Medium (80-120cm)

Granddaddy Purple Growing Tips

  • 1 GDP develops vibrant purple coloration naturally, enhanced by cool night temperatures during late flowering (60-65°F)
  • 2 This strain stays compact and bushy — perfect for sea of green (SOG) setups or small grow spaces
  • 3 Big Bud genetics mean heavy yields. Support branches during late flowering to prevent breakage
  • 4 GDP is mold-resistant but still benefits from good airflow. The dense buds can trap moisture if humidity is too high
❓ Granddaddy Purple FAQ ▼
Why is Granddaddy Purple so purple?

GDP contains high levels of anthocyanins, pigments that produce purple, red, and blue colors. Cool temperatures during flowering activate these pigments, intensifying the purple coloration.

Is GDP good for insomnia?

Yes. Granddaddy Purple is one of the most recommended strains for insomnia. Its heavy indica effects and myrcene-dominant terpene profile promote deep relaxation and sleep.

Does Granddaddy Purple taste like grapes?

Yes. GDP has a distinctive sweet grape and berry flavor that comes from its Purple Urkle genetics. The taste is often described as similar to grape candy or wine.

Similar strains you might like:
Purple Urkle Grape Ape Purple Kush Northern Lights
⏱
Autoflower Seed Beginner Friendly

This is an autoflowering cannabis seed — it will begin flowering automatically 3-4 weeks after germination, regardless of light schedule. Autoflowers are the fastest and simplest way to grow cannabis at home.

Growing Tips for Granddaddy Purple Strain Autoflower Seeds ↓
  • 1 Plant directly in your final container (3-5 gallon pot). Autoflowers dislike transplanting because their short lifecycle doesn't allow recovery time.
  • 2 Use light, well-draining soil with perlite. Autoflowers prefer lighter feeding — start at 50% of recommended nutrient doses and increase only if the plant looks hungry.
  • 3 Keep lights on 18-20 hours per day for the entire grow cycle. Autoflowers don't need a dark period to flower, and more light means bigger yields.
  • 4 Don't top or heavily train autoflowers — their short lifecycle doesn't allow recovery. Gentle LST (bending stems) is fine and can improve yields.
Time to Harvest: 8-10 weeks (seed to harvest)
Difficulty: Beginner Friendly
Seed Type: Autoflower
Common Questions ↓
Why are autoflowers smaller than regular plants?

Autoflowers contain ruderalis genetics that trigger early flowering. Their short lifecycle (8-10 weeks total) limits vegetative growth time. Modern autos have been bred much larger than early varieties — some XL autos yield over 200g per plant.

Can I grow autoflowers year-round indoors?

Yes. Since autoflowers don't depend on light cycles, you can start new plants any time. Many growers run perpetual harvests — starting new seeds every 2-3 weeks for continuous production.

Are autoflower buds less potent?

Modern autoflowers match photoperiod strains in potency. Many auto varieties test above 20% THC. Early autoflowers had lower potency, but years of breeding have closed the gap entirely.

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Close-up view of a mature cannabis flower, showcasing the Granddaddy Purple Strain Autoflower Seeds potential for high-quality yields. Ideal for autoflower cultivation.
Granddaddy Purple Strain Autoflower Seeds
From $39.00