Autoflower · ILGM Genetics
Auto Northern Lights
Auto Northern Lights is the ILGM autoflower conversion of the classic Sensi Seeds Northern Lights line, crossing the original NL #5 working stock with a ruderalis bridge to produce a fast, beginner-friendly autoflower that retains the squat indica structure and pine-and-earth terpenes of the photoperiod parent. The full seed-to-harvest cycle runs roughly nine to eleven weeks under 18-to-20-hour light, which is on the faster side for modern autoflowers, and the plants stay compact at 60 to 100 centimeters indoors. The flavor leans pine, earth, and a touch of sweet hash on the exhale, and the high is firmly indica with relaxed body effects and an end-of-day sedative tail that suits evening use. ILGM positions Auto Northern Lights as their flagship beginner autoflower, with high pest and mold resistance and forgiving feeding requirements that handle minor grower mistakes without dropping yield. The strain is consistently one of ILGM's top sellers in the autoflower category and a regular recommendation for first-time growers working with small indoor spaces.
Reviewed 2026-05-23· Sources: seedfinder.eu, ILGM catalogue
Potency
- THC range
- 16–21%
- Typical THC
- 19%
- CBD
- up to 0.5%
Flowering
- Indoor weeks
- 9–11 wk
- Difficulty
- Easy
- Climate
- temperate, cool temperate, Mediterranean, indoor
Yield & size
- Indoor
- 400-500 g/m²
- Outdoor
- 125-225 g/plant
- Height
- 60-100 cm
Indica / sativa ratio
Terpene profile
The aromatic compounds below shape how Auto Northern Lights 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
Humulene
Hoppy and earthy — appetite-suppressing and shared with hops and sage.
Reported side effects
Lineage
Auto Northern Lights traces to Northern Lights × ruderalis. The cross sits in the Afghan indica x ruderalis family, which influences both the terpene profile and the flowering structure described above.
Genetic family tree
Documented parents and grandparents for Auto Northern Lights 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
- 90% / 10%
- Flowering days
- 63–77 days
- Stretch
- Low
- Pest resistance
- High
- Mold resistance
- High
- Training methods
- lst
Feed schedule for Auto Northern Lights
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 Northern Lights is documented with a 10-week flower split across the standard hybrid phases. The visual below maps a documented 14-week cycle built from 4weeks of vegetative growth and the strain's published flowering window.
Published grow reports for Auto Northern Lights 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 Northern Lights. 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 Northern Lights 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 Northern Lightsnote this as the window where the canopy's eventual bud distribution becomes visible.
- Bud development (weeks 11-12)
- Flowers thicken and calyxes fatten through this phase. Documented Auto Northern Lights runs show the bulk of visible flower mass accumulating here, with resin production accelerating toward the end.
- Ripening (week 13)
- Trichomes transition from clear toward cloudy and amber. Reports for Auto Northern Lights describe the Myrcene-led terpene profile maturing through this window, with aroma sharpening week over week.
- Final (week 14)
- Calyx swelling is documented as complete and the harvest window opens. Published Auto Northern Lights runs end here, within the 9-11 week flowering range reported by the breeder.
Flavor & aroma
Reported effects
Common questions about Auto Northern Lights
Is Auto Northern Lights a good first-time autoflower?
Yes — ILGM markets it explicitly as their beginner-friendly auto. High pest and mold resistance, a fast nine-to-eleven-week total cycle, and forgiving feeding requirements make it one of the easier strains to grow successfully on a first attempt.
How much does Auto Northern Lights yield outdoors?
Roughly 125 to 225 grams per plant outdoors, with the autoflower cycle compressing harvest into a much shorter season than the photoperiod NL — meaning growers in northern climates can run two or three successive outdoor cycles between spring and fall.
Breeder of record
ILGM Genetics
View breeder profile and other strains →
More from ILGM Genetics
Strains similar to Auto Northern Lights
These picks lean on the same terpene profile and parent genetics as Auto Northern Lights — 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.