Granddaddy Purple Autoflower (Royal Queen Seeds) Feminized

Granddaddy Purple Autoflower: California Indica in a Compact Package

Granddaddy Purple is one of California's most recognisable indica strains, and Royal Queen Seeds has brought it into autoflower format without losing what makes it special. The first thing you notice is the colour: dense buds flushed with deep purple, a visual that holds up from seed to harvest. This is a cross of Purple Urkle and Big Bud Auto, the latter contributing ruderalis genetics that remove any need for light cycle management. Purple Urkle brings the grape-tinged indica depth and the signature pigmentation; Big Bud Auto adds structure, yield potential, and the autoflowering trait. At 19% THC, this sits firmly in the mid-to-high range, suited to experienced afternoon or evening sessions rather than casual daytime use.

Fast Finish, Small Footprint

The grow profile is straightforward. Indoors, plants stay between 70-120cm, compact enough to fit a standard tent without aggressive canopy management. LST works well if you want to open up the structure and push light deeper; topping is debated with autos and best avoided unless you have experience timing it right. Outdoors, expect plants to reach around 140cm. Yields come in at up to 450g/m² indoors and around 160g per plant outside, which is modest but manageable, well-suited to small-space growers who want quality over bulk. The standout detail: cooler night temperatures during the later stages of growth intensify the purple colouration noticeably. If you want the full visual payoff, let the temperature drop a little towards the end of the run. Seed to harvest takes 12 weeks, making it one of the faster ways to get a quality indica crop in the ground and finished.

Berry on the Cure, Body Stone at the End

Fresh off the cure, the aroma opens with sweet berry and candy notes layered over a floral undertone, with an earthy base underneath. On the palate, that berry sweetness carries through, joined by pine and a herbal finish that lingers. The effect is classic indica-dominant: a body-relaxing, happy stone that eases into something calming and sleepy. This is an evening strain. It's not the one you reach for before a productive afternoon, but for winding down after a long day it does exactly what it promises. The seeds are feminized, so every plant in the run is productive.

Granddaddy Purple Autoflower (Royal Queen Seeds) Feminized data sheet

Brand	Royal Queen Seeds
Terpenes	Myrcene, Linalool
Suitable for	Indoor, Outdoor
Grow difficulty	Easy
Parents	Granddaddy Purple x Big Bud Auto
Genetics	75% Indica / 25% Sativa
THC	19%
CBD	Low
Flowering Type	Autoflowering
Sex	Feminized
Flowering Time	8-9 weeks from seed to harvest
Height (Indoor)	120cm
Height (Outdoor)	140cm
Yield (Indoor)	Up to 450 gr/m²
Yield (Outdoor)	Up to 150 gr/plant
Taste / Aroma	Earthy, Berry, Candy, Herbal
Effects	Relaxing, Happy