How to grow Grandaddy Purple
THC 23% 
Flowering 63 - 70 days 
Yield 458 – 549 g/m² 
Height 50-150.1cm Seb's take
Purple Urkle and Big Bud combine in Grandaddy Purple, winner of the 2015 Denver High Times Cannabis Cup for Best US Indica. A 75% indica-leaning hybrid at 21-23% THC, popular in equal measure among recreational and medical growers — the awards, one gathers, were not accidental.
Where it comes from
Purple Urkle and Big Bud combine in Grandaddy Purple, a Californian creation and one of the most beautifully coloured indicas going. The record credits it with the 2015 Denver High Times Cannabis Cup for Best US Indica — a title the striking colour and heavy resin go some way to explaining. Purple Urkle brings the hue and the sweetness; Big Bud the mass. A 75% indica hybrid with a genuine pedigree behind the looks.
Nose & flavour
No tasting notes are recorded, so I will not invent them. The line's reputation, though, is built on a sweet, grape-leaning character — the Purple Urkle parent's usual contribution — and the buds are as celebrated for their colour as their smell. On specifics the record stays quiet, and so shall I.
The high
The effects are left unlisted, but 75% indica at 21 to 23% THC points in one direction: relaxed and heavy rather than lively. The record notes it is as popular with recreational growers as with those who lean on it for calm, which suggests a rounded, dependable sort of high. A settling one, going by its build.
Growing it
Feminised, medium in stature, though the record's range is wide — anywhere from 50 to roughly 150cm. Flowering runs 63 to 70 days, with yields between 458 and 549 g/m². CBD sits at 0.5%. A rewarding grow for the colour alone, and an award-winner for good reason — the beauty is not just skin deep.
Learn to grow her properly:
Grandaddy Purple from other breeders
The same name, several hands. Every breeder’s version below is its own cut — different figures, different temperament, same family. The particulars above describe the lead listing.
- Blimburn Seeds feminized Seeds at Herbies →
A bigger number on the breeder's sheet (35% THC).
Common questions about Grandaddy Purple
How long does Grandaddy Purple take to flower?
Around 10 weeks of flowering, by the breeder's numbers.
Is Grandaddy Purple an autoflower or a photoperiod strain?
A feminized photoperiod strain — flowering starts when you switch the lights, so the timing is yours to control.
How tall does Grandaddy Purple grow?
Around 150 cm. Standard tent territory.
How strong is Grandaddy Purple?
The breeder lists THC around 23%. Firmly in the strong band.
