How to grow Birthday Cake
THC 27% 
Flowering 55 - 65 days 
Yield 549 – 641 g/m² 
Height 100.1-130cm Taste
Seb's take
Durban Poison, Granddaddy Purple, and Girl Scout Cookies combine for an 80:20 Indica hybrid built on dessert flavours — buttery, nutty, sweet, and vanilla throughout. The high runs euphoric, happy, and relaxing, with an appetite close behind, suited to any occasion worth celebrating.
Where it comes from
A dessert built from serious stock: Durban Poison, Granddaddy Purple, and Girl Scout Cookies, folded into an eighty-twenty indica hybrid. It is a well-connected family — GSC itself owes a debt to Durban Poison, so there is a certain symmetry in seeing it back on the tree. Herbies have leaned the result toward the body, and named it for the flavour, which does most of the talking.
Nose & flavour
This is where the name earns out. Buttery and sweet up front, with vanilla threading through and a nutty warmth underneath — genuinely cake-like, the sort of nose that reads as pudding rather than plant. Rich and indulgent, and the closest a jar comes to a bakery. A dessert profile, honestly titled.
The high
At twenty-five to twenty-seven per cent the effect matches the richness — euphoric and happy first, easing into a relaxed body weight, with an appetite that arrives dependably on cue. It suits company as readily as a quiet evening alone, which is the record's own claim and a fair one. Just mind the strength before a busy day: this one settles in.
Growing it
A manageable plant — roughly a hundred to a hundred and thirty centimetres, medium and tidy — that flowers in fifty-five to sixty-five days. The return is heavy, 549 to 641 g/m², which is generous for a plant this size. The eighty per cent indica keeps her stout and disinclined to stretch, so a modest space serves her well. Support the colas as the weight builds, and she will bring the whole harvest home.
Learn to grow her properly:
Effects
Birthday Cake 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.
- World Wide Cultivars feminized Seeds at Herbies →
Common questions about Birthday Cake
How long does Birthday Cake take to flower?
Around 9 weeks of flowering, by the breeder's numbers.
Is Birthday Cake 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 Birthday Cake grow?
Around 130 cm. Standard tent territory.
How strong is Birthday Cake?
The breeder lists THC around 27%. Among the strongest figures in the catalogue.
