Granddaddy Purple Auto Seeds

World Wide Cultivars
Feminized
Autoflowering
EU
0.0

Granddaddy Purple Auto Strain Characteristics

Strain brand World Wide Cultivars
Strain Gender Feminized
Strain light cycle Autoflowering
Suitable for growing Outdoor, Indoor
Strain THC level 16 - 19%
% Sativa/ Indica/ Ruderalis 20% Sativa / 80% Indica
Strain harvest 1.3 - 1.8 oz/ft² indoors
10.6 oz/plant outdoors
From seed to harvest 56 - 70 days
Strain height 47.2 inches indoors
47.2 inches outdoors
Strain effect Put your evening in slippers
Genetics Purple Urkel x Bigbud x Ruderalis
Granddaddy Purple Auto Strain Reviews
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Granddaddy Purple Auto is the kind of strain that dims the lights without asking the room first. Berry sweetness leads the smoke, herbal depth keeps it grounded, and the mostly Indica effect settles in with a happy calm that feels made for slow evenings and softer plans.

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Description

Granddaddy Purple Auto Strain Info

Granddaddy Purple Auto is an auto feminized strain with a 20% Sativa/80% Indica ratio and 16-19% THC. This mostly Indica autoflower is compact, robust, moderately easy to grow, and hardy, with a fast cycle that suits growers who want dependable results without photoperiod scheduling. Its effects are focused, happy, and relaxing, giving the strain a calm mood with just enough mental clarity to keep the experience pleasantly present. The source text also highlights resin-covered buds and a sweet berry-style profile, making Granddaddy Purple Auto a friendly option for growers who enjoy classic purple-line character in an autoflowering format.

Genetics

Granddaddy Purple Auto was created from Purple Urkel and Big Bud, with Ruderalis genetics added for autoflowering behavior. Purple Urkel brings the berry-rich Indica personality and classic purple-strain comfort. Big Bud contributes production potential and sturdy growth, while the Ruderalis side gives the plant its automatic life cycle. The result is a quick mostly Indica auto with a mellow effect and practical garden manners.

Flowering Time

Granddaddy Purple Auto goes from seed to harvest in 56-70 days, or about 8-10 weeks. That short cycle makes it suitable for growers who want a quicker turnaround, and outdoor cultivators in the Northern Hemisphere can sow in April for a mid-summer harvest. Since it flowers automatically, indoor growers can use 18/6 or 20/4 lighting to support stronger growth.

Yields

Indoors, Granddaddy Purple Auto can produce around 1.3-1.8oz/ft² (400-550g/m²). Outdoors, growers can expect approximately 10.6oz (300g) per plant in suitable conditions. These yields are solid for an autoflower, especially when plants receive strong light, stable warmth, and enough airflow during the final weeks.

Effects

The high begins with a focused calm that helps the mind stay clear rather than foggy. A happy mood rises next, giving the experience a gentle brightness before the Indica side becomes more noticeable. Relaxation then settles through the body with an easy pace, making Granddaddy Purple Auto a good match for evening use or quiet downtime after a busy day. It is not a chaotic ride. It is more like putting your thoughts in slippers.

Relaxed
Happy
Focused

THC and CBD Levels

Granddaddy Purple Auto contains 16-19% THC. This profile suggests a medium-strength THC experience, making the strain more approachable than many ultra-potent modern autos. The 80% Indica structure shapes the effect toward body comfort and a calmer finish, while the Sativa share helps keep the mood from feeling too heavy right away.

Smell and Taste

The flavor centers on berry sweetness, with herbal notes adding a drier edge. The source text also mentions sweet caramel grapes, mixed berries, and a floral undertone, giving the aroma a soft purple-strain signature. On the smoke, it feels sweet but not sticky-sweet, with the herbal side adding enough depth to keep the profile balanced.

Sweet
Floral
Berry

Grow Tips

Granddaddy Purple Auto reaches about 3.9ft (120cm), making it useful for indoor spaces where height control matters. It prefers Mediterranean-style conditions, with warm dry summers, mild wet winters, and an ideal temperature range of 70-85°F (21-29°C).

  • Use 18/6 or 20/4 lighting indoors to support stronger autoflower growth.
  • Keep RH around 55-60% in veg, then lower it during flowering.
  • Choose perlite, peat, or coco coir for balanced moisture retention.
  • Use well-draining soil outdoors to reduce root issues.
  • Maintain steady airflow indoors, especially as resin builds late in the cycle.

Granddaddy Purple Auto Seeds for Sale

Searching for auto feminized seeds with berry sweetness and a calm Indica finish? Granddaddy Purple Auto brings fast timing, manageable growth, and mellow purple-line charm to the grow room. Buy online from Herbies and let this easygoing auto turn your next harvest into a softer landing.

Written by
Ethan Cole
Cannabis cultivation expert and writer

Cannabis cultivation expert with over a decade of experience in indoor growing and grower education.

Reviewed by
Sylvia Johnson
Indoor growing expert and cannabis writer
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Granddaddy Purple Auto Strain Reviews
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