Autoflower · Dutch Passion
Auto Blueberry
Auto Blueberry is the Dutch Passion autoflower conversion of the DJ Short Blueberry line, working from the bank's own DJ Short-derived mother stock crossed with ruderalis to lock the photoperiod-independent flowering trait into the canonical Blueberry terpene profile. The total cycle runs ten to eleven weeks from seed under 18-to-20-hour light, with plants staying compact at 60 to 100 centimeters indoors and producing the characteristic blue-tinted late-flower foliage that Blueberry growers expect from the original photoperiod line. The flavor leans heavily on ripe blueberry and sweet fruit terpenes — the auto conversion is one of the better preservations of the Blueberry expression compared to most autoflower fruit conversions — and the high is balanced indica-leaning with relaxed body effects and a clear euphoric lift. Dutch Passion has carried Auto Blueberry continuously since the early 2010s as one of their core autoflower offerings and a regular benchmark for fruit-terpene autos in the European market. The strain is well-suited to small grow spaces and to beginning growers looking for a photoperiod-quality terpene profile in an autoflower format.
Reviewed 2026-05-23· Sources: seedfinder.eu, Dutch Passion catalogue
Potency
- THC range
- 15–19%
- Typical THC
- 17%
- CBD
- up to 0.5%
Flowering
- Indoor weeks
- 10–11 wk
- Difficulty
- Easy
- Climate
- temperate, Mediterranean, indoor
Yield & size
- Indoor
- 375-475 g/m²
- Outdoor
- 100-200 g/plant
- Height
- 60-100 cm
Indica / sativa ratio
Terpene profile
The aromatic compounds below shape how Auto Blueberry smells, tastes, and ultimately feels in the body.
- dominant
Myrcene
Sedating, musky, herbal — commonly linked to couch-lock effects.
- secondary
Pinene
Alert and pine-forward — associated with mental clarity and bronchodilation.
- secondary
Caryophyllene
Peppery and spicy — the only terpene that binds CB2 receptors, studied for anti-inflammatory action.
- minor
Limonene
Uplifting citrus — typically associated with mood elevation and stress relief.
Reported side effects
Lineage
Auto Blueberry traces to Blueberry × ruderalis. The cross sits in the Blueberry x ruderalis family, which influences both the terpene profile and the flowering structure described above.
Genetic family tree
Documented parents for Auto Blueberry based on breeder catalogues. Library entries are clickable; ancestors not yet documented on this site appear in a lighter, non-linked box.
Grow profile
Grow profile
- Indica / sativa
- 80% / 20%
- Flowering days
- 70–77 days
- Stretch
- Low
- Pest resistance
- High
- Mold resistance
- High
- Training methods
- lst
Feed schedule for Auto Blueberry
These EC and NPK targets are starting points calibrated for the strain's Hybrid lean and easy difficulty rating — not gospel. Drop 15-20% off any EC ceiling on your first run and let the plant tell you where it actually wants to feed.
Suggested feed schedule
- Late veg
- 1.0-1.2 EC
- Early flower
- 1.1-1.3 EC, NPK 2-2-4
- Mid flower
- 1.4-1.6 EC, NPK 1-3-5
- Late flower
- 1.2-1.4 EC
- Final week
- Plain pH-balanced water for the last 5-7 days.
Full breakdown of feed math, runoff testing, and salt buildup in our nutrient guide.
What to expect through the grow cycle
Auto Blueberry is documented with a 11-week flower split across the standard hybrid phases. The visual below maps a documented 15-week cycle built from 4weeks of vegetative growth and the strain's published flowering window.
Published grow reports for Auto Blueberry concentrate the most observational notes on the mid-to-late flower transition. This timeline is descriptive — it reflects what reports document, not a how-to. Actual week-to-week behaviour varies with phenotype, light intensity, pot size, and environment.
Phase details
- Veg (weeks 1-4)
- The documented vegetative period for Auto Blueberry. Plants establish root structure, leaf canopy, and node count before flower triggering, with a easy difficulty rating shaping how forgiving the early canopy work tends to be.
- Stretch (weeks 5-8)
- Auto Blueberry is documented as having low stretch. Reports describe the plant roughly doubling in height during this phase as the hybrid structure establishes its final flowering frame.
- Bud sites (weeks 9-10)
- Pre-flowers form at the nodes and calyxes begin to develop. Grow reports for Auto Blueberrynote this as the window where the canopy's eventual bud distribution becomes visible.
- Bud development (weeks 11-13)
- Flowers thicken and calyxes fatten through this phase. Documented Auto Blueberry runs show the bulk of visible flower mass accumulating here, with resin production accelerating toward the end.
- Ripening (week 14)
- Trichomes transition from clear toward cloudy and amber. Reports for Auto Blueberry describe the Myrcene-led terpene profile maturing through this window, with aroma sharpening week over week.
- Final (week 15)
- Calyx swelling is documented as complete and the harvest window opens. Published Auto Blueberry runs end here, within the 10-11 week flowering range reported by the breeder.
Flavor & aroma
Reported effects
Common questions about Auto Blueberry
Does Auto Blueberry get the same blue color as photoperiod Blueberry?
Yes, under cool nighttime temperatures in the final two weeks of flowering. The anthocyanin expression carries through the auto conversion when growers drop nighttime tent temperatures into the 60-to-65-degree Fahrenheit range during the last fortnight.
How does the auto compare to DJ Short's original Blueberry?
Cycle time is roughly half the original — ten to eleven weeks from seed versus a full vegetative period plus nine to ten weeks of flowering. Yields per plant are lower, but the terpene profile and the characteristic blue late-flower coloration carry through better in this auto than in most autoflower fruit conversions.
Breeder of record
Dutch Passion
View breeder profile and other strains →
More from Dutch Passion
Strains similar to Auto Blueberry
These picks lean on the same terpene profile and parent genetics as Auto Blueberry — shared dominant terps, overlapping lineage, and matching indica/sativa lean. No star ratings or popularity contests, just overlap on the traits that actually drive a similar grow and smoke.