Northern Light Auto Expert Seeds · Expert Seeds Autoflowering Genetics for Fast, Potent Harvests

The Northern Light Auto by Expert Seeds is a legendary autoflowering strain that delivers the classic potency and resin production of the original Northern Lights in a fast, easy-to-grow package. This is your express ticket to a heavy, satisfying harvest without the wait.

Ever feel like growing top-shelf weed takes too much time and attention? You're not alone. Juggling light schedules, worrying about light leaks, and waiting months for a harvest can drain your enthusiasm. That frustration turns your passion into a chore, leaving you with mediocre results or, worse, no harvest at all. The Northern Light Auto cuts through that noise. It's the autoflowering solution that respects your time, delivering the legendary Northern Lights experience on an accelerated schedule. You get the iconic effects and aroma without the photoperiod hassle.

Before You Pop Your Seeds

Getting started with Northern Light Auto is refreshingly simple. Since it's an autoflower, you don't need to worry about changing light cycles. Your main prep involves choosing a final pot early—these plants don't like being transplanted. Aim for a container between 18–27 L (4.75–7.13 gal). A well-aerated, light mix soil is perfect, or you can go with a simple coco-perlite setup.

• Germinate directly in your final pot or a small starter pot to minimize root disturbance.
• Ensure your grow space is ready with stable temperatures between 22–26°C (71.6–78.8°F).
• Have a gentle, balanced nutrient formula on hand for the seedling stage.
• Set your lights to an 18/6 schedule from day one and stick with it.
• Keep humidity high (60-70%) for the first week to help those tender seedlings thrive.

During the Grow: From Sprout to Sticky Buds

Once your seedling emerges, you'll watch it transition to a short, bushy vegetative phase before automatically kicking into flower around week 3-4. This strain is vigorous and forgiving, making it a joy to cultivate. Keep the environment consistent, and you'll be rewarded with rapid growth. While it can handle some gentle low-stress training (LST) to open up the canopy, avoid topping or any aggressive pruning that could stunt its automatic growth cycle. The key is to support, not stress.

After Harvest: Enjoying the Fruits of Your Labor

In just 63–70 days from seed, you'll be harvesting dense, frosty colas. The post-harvest process is where the magic is finalized. Dry your buds slowly in a dark space with 50-60% RH and 18–22°C (64.4–71.6°F) for about 7-10 days. Then, cure them in airtight jars for at least two weeks, burping daily. This patience transforms good weed into great weed, smoothing out the smoke and intensifying the classic Northern Lights flavor profile.

Short- and Long-Term Advantages and Benefits

• Speed & Simplicity: Harvest in about 9–10 weeks, perfect for multiple cycles per year or a quick personal stash.
• Discreet & Compact: Stays around 0.80–1.20 m (2.62–3.94 ft) indoors, ideal for small spaces and stealth grows.
• Forgiving Nature: High resistance to common molds and pests, making it a safe bet for beginners.
• Potent Payoff: Delivers a powerful, physically relaxing high that's perfect for evening unwinding.
• Consistent Quality: Autoflowering genetics ensure a reliable harvest of dense, resinous buds every time.
• Low Maintenance: No light schedule changes needed; just provide consistent care and watch it thrive.
• Great Yield for an Auto: Can produce 400–500 g/m² (approx. 1.31–1.64 oz/ft²) indoors under optimal conditions.
• Classic Flavor: Enjoy the timeless, earthy pine and skunky sweetness that made Northern Lights famous.

Technical Specifications

• Breeder / Brand: Expert Seeds
• Type: Autoflowering
• Dominance: Indica-dominant hybrid
• Genetics: Northern Lights x Ruderalis
• Full Life Cycle: Approx. 63–70 days from seed to harvest
• Indoor Yield: Approx. 400–500 g/m² (approx. 1.31–1.64 oz/ft²)
• Outdoor Yield: Approx. 80–150 g/plant (approx. 2.82–5.29 oz/plant)
• Indoor Height: Approx. 0.80–1.20 m (2.62–3.94 ft)
• Outdoor Height: Approx. 1.00–1.50 m (3.28–4.92 ft)
• Difficulty: Low (Easy for beginners)
• THC Level: High (Approx. 18–22%)
• CBD Level: Low (
• Aroma: Earthy, pine, skunky with sweet berry undertones
• Flavor: Earthy, woody, pine with a sweet, fruity finish
• Effect: Powerful body relaxation, cerebral calm, euphoric

Frequently Asked Questions

How long does Northern Light Auto take from seed to harvest?

You can expect to harvest in approximately 9–10 weeks (63–70 days) from the moment you germinate the seed. It's one of the faster autoflowering options for a harvest of this quality.

Can I top or heavily prune Northern Light Auto?

It's not recommended. Autoflowers have a fixed life cycle, and aggressive techniques like topping can stunt growth and reduce your final yield. Stick to gentle low-stress training (LST) if you want to shape the plant.

What's the best lighting schedule for this autoflower?

Run an 18 hours on, 6 hours off (18/6) light schedule throughout its entire life. This provides ample energy for growth and resin production without the cost of a 24/0 cycle.

Is Northern Light Auto good for outdoor growing?

Absolutely. Its resilience and mold resistance make it a solid choice for outdoor gardens. It will finish by late September in the Northern Hemisphere, yielding compact, chunky buds.

How do I know when it's ready to harvest?

Watch the trichomes on the buds with a jeweler's loupe. For a more energetic high, harvest when most are milky white. For a heavier, couch-lock effect, wait until 20-30% have turned amber.

Personal Experience of Pevgrow’s CEO (Alan)

Let me tell you, Northern Light Auto is my go-to recommendation for anyone who wants "fire" but doesn't have the patience for a 4-month photoperiod project. I always start these in their final pot—a 20 L (5.28 gal) fabric pot with a light, airy soil mix works wonders. I keep my lights at a steady 18/6 and feed lightly; this strain doesn't need a heavy hand with nutrients. Around week 3, you'll see it start to stretch and pre-flower on its own—no flipping required. The smell is a classic, pungent skunk and pine that really starts to fill the tent around week 6, so a good carbon filter is a must. The buds stack densely and get absolutely caked in trichomes. Post-harvest, the smoke is smooth, with that iconic earthy taste and a stone that melts stress away. It's proof you don't need complexity for top-shelf results.