Squirt Auto is as exotic as Humboldt Seed Company genetics get. The original was spotted during the breeder’s 10,000-plant Phenotype Mega Hunt, and the autoflower version keeps its sweet and tart grapefruit terpenes with around 20% THC on a sativa-dominant plant that finishes in 80-90 days from seed.
The selected plant was labeled BBMxTang #118, a cross of Blueberry Muffin and Tangie. Humboldt Seed Company then returned to its genetic preservation library and began a breeding program to stabilize that standout terpene profile.
The defining feature is how it holds its aroma. The breeder notes that Squirt consistently produces mono and sesquiterpenes that last longer than many others, which is why it calls the strain an extractor’s dream.
Expect some variation in anthocyanin levels, which shows up as gorgeous purple and green buds, but consistency in chemotype, flavor and nose. The effect is listed as energizing and functional, ideal for active days.
Lineage and Breeding of Squirt Auto
The auto parentage is listed as BBM x Tangie x BBM Auto, combining Blueberry Muffin and Tangie with an autoflowering Blueberry Muffin line. Blueberry Muffin brings sweetness and structure, while Tangie supplies the zesty citrus that becomes grapefruit in the final profile.
Humboldt Seed Company currently lists the line as Bx5, the product of repeated backcrossing since the original #118 selection. That work keeps the chemotype and aroma consistent even when bud color varies from plant to plant.
Aroma, Flavor and Effect
The aroma is pure sweet and tart grapefruit, juicy and bright with a sharp citrus snap. It carries through to the flavor, where the sweetness balances the tang, and the terpenes stay vivid well after the cure.
With a 20% indica / 80% sativa balance, the effect is energizing and functional. It keeps the mind clear and the energy up, which suits daytime errands, outdoor activities and creative work. THC is listed at around 20%, giving a lively but manageable experience.
For extractors, the long-lasting terpene profile is the main draw. Whether pressed into rosin or processed another way, the grapefruit character tends to survive the process.
Growing Squirt Auto Indoors and Outdoors
Squirt Auto switches to flowering on its own, so indoor lights can stay at 18/6 or 20/4 from seed to harvest. The breeder lists 80-90 days for the full cycle. Being sativa dominant, it may stretch more than compact indica autos, so leave some vertical room.
Sow into final pots of 3-5 gallons (11-19 L) and use early LST to manage stretch and open the canopy. Cooler night temperatures in late flower can encourage purple expression in plants that carry higher anthocyanin levels.
Outdoors, plant after the last frost for a summer harvest. If the goal is extraction, harvest at peak terpene expression and handle the buds gently to preserve the trichomes. A second planting can fit into longer seasons.
Squirt Auto Characteristics
| Strain type | Autoflowering feminized |
| Genetics | BBM x Tangie x BBM Auto (original: Blueberry Muffin x Tangie, #118), Bx5 |
| Indica/Sativa | 20% Indica / 80% Sativa |
| THC | About 20% |
| Effect | Energizing, functional |
| Flavor/Aroma | Sweet and tart grapefruit |
| Flowering time / Seed to harvest | 80-90 days from seed |
| Yield | Good (breeder gives no figures) |
| Characteristics | Extractor’s dream; long-lasting mono and sesquiterpenes; purple and green buds |
| Best cultivation technique | Final pots from day one, early LST, 18/6 or 20/4 light |
FAQ
Is Squirt Auto indica or sativa?
It is sativa dominant, listed at 20% indica and 80% sativa.
How long does Squirt Auto take from seed to harvest?
The breeder lists 80-90 days from seed to harvest, with no light switch needed.
What does Squirt Auto taste like?
Sweet and tart grapefruit, with a bright citrus profile that lasts well after curing.
Is Squirt Auto good for extraction?
Humboldt Seed Company calls it an extractor’s dream thanks to its long-lasting mono and sesquiterpenes.
Where did Squirt come from?
It was found as BBMxTang #118 during the breeder’s 10,000-plant Phenotype Mega Hunt and then stabilized through backcrossing.
Why do some Squirt Auto plants turn purple?
Anthocyanin levels vary across the line, so some plants show purple tones while chemotype, flavor and aroma stay consistent.
