When Northern Lights arrived in the Dutch growing scene, it quickly became the standard for indoor cultivation and went on to shape modern breeding worldwide. Royal Queen Seeds’ Northern Light Auto keeps that classic heart and adds a modern twist: by crossing Northern Light with ruderalis, the breeders created a feminized autoflower that blends old-school character with new-school speed.
The genetic split is 80% indica and 20% ruderalis. That ruderalis share is what lets her switch into bloom on her own, so there is no light-schedule change to manage. Many growers simply keep their lights on 18/6 or 20/4 from sprouting until the chop.
After a short vegetative stretch, the plant pours its energy into flowers. Bloom lasts 45–55 days (about 6.5–8 weeks), and the full life cycle wraps up 70–85 days after germination, roughly 10 to 12 weeks. That pace means outdoor growers can fit more than one run into a single season.
Northern Light Auto is a sizable plant for an autoflower. Indoors she reaches 3 to 4 feet (90–120 cm), and outdoors 4 to 5 feet (120–150 cm). That frame explains her productivity: Royal Queen Seeds lists 18 to 19 oz/m² (510–540 g/m²) indoors and 6 to 8 oz/plant (170–225 g/plant) outdoors, numbers that put her among the more productive autos in the catalog.
Sweet Flavor and a Clear, Comfortable High
Like the original, Northern Light Auto has a pleasantly sweet taste. The data sheet lists citrus, earth, fruit, pepper and pine, and they come together as a smooth, rounded smoke: fresh pine and soft citrus up front, a sweet fruity middle and a spicy, peppery finish.
With THC up to 14%, she is a more approachable smoke than many modern heavy hitters. The high is clear and uplifting in the head, while a comfortable physical ease settles through the body. It is a friendly, easygoing strain for unwinding without losing the thread of the evening, and a good option for anyone who prefers a balanced experience over a knockout punch.
Imagine a slow walk through a pine forest at dusk: refreshing, calm and grounded, with your head still clear enough to enjoy the view.
Growing Northern Light Auto
Her compact life cycle and solid structure make her suitable for discreet indoor setups as well as higher-volume outdoor gardens. Start seeds directly in their final container to avoid transplant stress, use gentle low-stress training in the first weeks to widen the canopy, and avoid heavy pruning once flowers form. In a long-summer climate you can start a first batch in spring and a second in early summer, harvesting twice before autumn.
Northern Light Auto Characteristics
| Strain type | Autoflowering (feminized) |
| Genetics | Northern Light x Ruderalis |
| Indica/Sativa | 80% Indica / 20% Ruderalis |
| THC | Up to 14% |
| CBD | Low |
| Effect | Clear, uplifting, comfortable body |
| Flavor | Citrus, earthy, fruity, pepper, pine |
| Indoor yield | 18 to 19 oz/m² (510–540 g/m²) |
| Outdoor yield | 6 to 8 oz/plant (170–225 g/plant) |
| Flowering time | 45–55 days (about 6.5–8 weeks) |
| Seed to harvest | 70–85 days (about 10–12 weeks) |
| Height | Indoors 3 to 4 feet (90–120 cm); outdoors 4 to 5 feet (120–150 cm) |
| Climate | Long summers |
| Best cultivation technique | Gentle LST under 18/6 or 20/4 light |
FAQ
How long does Northern Light Auto take from seed to harvest?
Royal Queen Seeds lists 70 to 85 days after germination, about 10 to 12 weeks. The flowering phase alone takes 45 to 55 days.
Does Northern Light Auto need a 12/12 light schedule?
No. She flowers automatically thanks to her ruderalis genetics. Keep the lights on 18/6 or 20/4 for the whole grow.
How much THC does Northern Light Auto have?
Up to 14% THC, with low CBD. The effect is clear and uplifting with a comfortable physical feel.
How big does Northern Light Auto grow?
She reaches 3 to 4 feet (90 to 120 cm) indoors and 4 to 5 feet (120 to 150 cm) outdoors, which is large for an autoflower.
What yields can I expect from Northern Light Auto?
Indoors, 18 to 19 oz/m² (510 to 540 g/m²). Outdoors, 6 to 8 oz/plant (170 to 225 g/plant).
How is Northern Light Auto different from feminized Northern Light?
The photoperiod version is pure indica and needs a 12/12 schedule to flower. The Auto adds ruderalis, flowers on her own and finishes from seed in roughly 10 to 12 weeks.
Reviews
There are no reviews yet.