Grandaddy Purple Autoflowering Seeds

Grandaddy Purple Autoflowering Seeds adapt the classic Purple Urkle × Big Bud Grandaddy Purple family to an automatic flowering cycle by adding autoflowering ancestry. The result is a compact, indica-dominant auto with broad foliage, short internodes, dense flower formation, strong colour potential, and the grape-and-berry aroma associated with the cultivar.

• Lineage: Grandaddy Purple family (Purple Urkle × Big Bud) × autoflowering ancestry
• Growth type: Indica-dominant autoflower
• Plant structure: Compact and bushy with broad leaves, a thick central stem, and sturdy side branches
• Stretch: Low
• Indoor seed-to-harvest: Typically about 9–10 weeks from sprouting
• Outdoor seed-to-harvest: Typically about 9–11 weeks from sprouting; harvest depends on sowing date
• Flower structure: Dense, chunky flowers with close calyx stacking
• Resin production: High
• Colour: Green with purple, violet, plum, or burgundy tones possible depending on phenotype and cooler late-cycle conditions
• Aroma: Grape, dark berry, sweet fruit, earth, herbs, and light spice
• Best suited for: Growers wanting compact automatic growth, strong colour potential, and a fruit-forward indica profile

Grandaddy Purple Auto generally forms a naturally low, broad canopy with limited vertical extension. Gentle low-stress training can help expose side branches, but heavy pruning is rarely necessary because the automatic vegetative phase is short and the plant naturally stays compact.

Indoors, a practical full-cycle target is approximately 63–70 days from sprouting. Flowers usually become dense and increasingly resinous through the second half of the cycle. Purple expression is not guaranteed and depends on phenotype as well as environmental conditions; cooler nights can intensify darker pigmentation where the genetics support it.

Outdoors, timing is determined by sowing date rather than autumn day length. Under favourable conditions, growers should plan on roughly 9–11 weeks from sprouting. This allows harvest during the warm season rather than waiting for a conventional October photoperiod finish.

The aromatic profile commonly combines ripe grape and dark berry with sweet fruit, earth, herbal notes, and light spice. Grandaddy Purple Autoflowering Seeds are best suited to growers looking for a compact, colourful auto with dense resinous flowers and a roughly ten-week fixed cycle.