Blueberry Muffin is one of the strains that built Humboldt Seed Company’s reputation. It is a company favorite and a signature line, and it lives up to its name: the buds smell so strongly of fresh-baked blueberry muffins that the jar could pass for a bakery box. This Indica-dominant feminized photoperiod with 20-28% THC finishes in just 45 days.
The breeder lists the genetics as Blueberry Muffin x Razzleberry x PPD, built on a double breeding line (Bx10 x BBM#4) for hybrid vigor. That deep selection shows in the garden. Plants grow uniformly, yield consistently and form frosty colas highlighted with purple flakes.
Blueberry Muffin has collected awards along the way, including sixth place at the Emerald Cup in 2017, and it remains a favorite for big field productions and live resin.
Lineage and Breeding: A Double Line for Hybrid Vigor
Blueberry Muffin traces back to two Indica parents, Razzleberry and PPD, which gave it frosty colas and purple coloring mixed into the green. Humboldt Seed Company then refined the line for years. The current release combines a tenth-generation backcross with a selected BBM#4 mother, a double breeding line designed to keep the signature terps while adding vigor.
That work explains why Blueberry Muffin is so uniform from seed, and why the breeder has used it as a parent in newer hits such as Apple Blossom, Blueberry Cupcake and Blueberry Pancakes.
Aroma, Flavor and Effect
The aroma is sweet blueberries, warm muffin crumb and a soft chamomile note, fruity and slightly earthy. The flavor follows suit: fresh-baked pastry with sweet berry terps on the exhale. The breeder reports a terpene profile led by myrcene, bisabolol, caryophyllene, limonene and humulene, which gives the bouquet its depth.
The effect is energizing, with a little more pep than most Indica-dominant strains. A bright, cheerful lift arrives first, followed by a light physical ease that keeps the body comfortable without slowing the mind. It suits afternoons, social sessions and anyone who wants dessert-level flavor without a heavy finish.
Growing Blueberry Muffin Indoors and Outdoors
Indoors, the breeder recommends topping and a Screen of Green, and it is good advice. Blueberry Muffin grows wide, so filling a net with evenly spaced branches turns that width into rows of frosty tops. Flowering takes about 45 days, roughly six and a half weeks. The plant rewards attentive growers: it takes some care and expertise to reach its full potential, but the yields can be extraordinary.
Outdoors, Blueberry Muffin loves a Mediterranean climate with long, warm, sunny days. Its wide frame makes it well suited to open ground, and harvest falls between September 15 and October 10. The early finish is ideal for regions with wet autumns. Expect purple flakes to show up as the nights cool.
Blueberry Muffin Characteristics
| Strain type | Feminized photoperiod |
| Genetics | Blueberry Muffin x Razzleberry x PPD (Bx10 x BBM#4) |
| Indica/Sativa | Indica dominant |
| THC | 20-28% |
| Effect | Energizing, with light physical ease |
| Flavor/Aroma | Blueberries, muffins, chamomile |
| Flowering time | 45 days (about 6.5 weeks) |
| Outdoor harvest | September 15 – October 10 |
| Yield | Consistent, high yielding |
| Characteristics | Uniform growth, wide plants, frosty colas with purple flakes, epic terps |
| Best cultivation technique | Topping and SCROG |
FAQ
Is Blueberry Muffin Indica or Sativa?
Blueberry Muffin is Indica dominant, bred from two Indica parents, Razzleberry and PPD. Its effect is surprisingly energizing for an Indica-leaning strain.
How much THC does Blueberry Muffin have?
Humboldt Seed Company lists THC between 20% and 28%.
What terpenes are in Blueberry Muffin?
The breeder reports a profile dominated by myrcene, bisabolol, caryophyllene, limonene and humulene, which produce its sweet, fruity and slightly earthy aroma.
How long does Blueberry Muffin take to flower?
Indoors it flowers in about 45 days. Outdoors, harvest falls between September 15 and October 10.
How should I grow Blueberry Muffin indoors?
Top the plants and use a Screen of Green. Blueberry Muffin grows wide, and spreading it across a net produces even, frosty colas.
Has Blueberry Muffin won any awards?
Yes. Among other awards, it placed sixth at the Emerald Cup in 2017.
