Auto Northern Lights XXL 00 Seeds – High-Yield Autoflowering Strain for Easy Growing & Big Harvests

Auto Northern Lights XXL by 00 Seeds is your shortcut to big, resin-packed harvests without the hassle—perfect for growers who want maximum results with minimal effort.

Are you tired of weak autoflowers that barely fill a jar?

Too many automatic strains promise big yields but deliver scrawny plants and wispy buds. You end up wasting time, space, and nutrients on genetics that can’t handle stress or produce consistently.

What if your first grow could actually impress?

Imagine harvesting over half a kilo per square meter indoors—or 200 grams per plant outside—without advanced skills. No pH nightmares, no nutrient burn, no mold panic. Just a sturdy, fast-growing plant that thrives on neglect and rewards you with thick, trichome-blitzed colas.

Auto Northern Lights XXL turns average growers into harvest heroes

This isn’t just another auto—it’s a stabilized XXL phenotype of the legendary Northern Lights, bred for size, yield, and resilience. With 18% THC, a sweet-spicy flavor, and a deeply relaxing effect, it’s the complete package. Whether you're growing in a closet or a greenhouse, it adapts, performs, and delivers.

Technical specifications

• Breeder / Brand: 00 Seeds
• Type: Autoflowering
• Dominance: 80% Indica / 20% Ruderalis
• Genetics: Northern Lights × Ruderalis
• Total cycle: 85–90 days from germination to harvest
• Indoor yield: 550–650 g/m² (19.4–22.9 oz/ft²)
• Outdoor yield: 100–200 g/plant (3.5–7.05 oz/plant)
• Indoor height: 0.90–1.10 m (2.95–3.61 ft)
• Outdoor height: 1.30–1.60 m (4.27–5.25 ft)
• THC: 18%
• CBD: 1%
• Difficulty: Low
• Smell in grow: Low to medium – discreet for indoor grows
• Flavour: Sweet, spicy, with a hint of liquor
• Effect: Relaxing, physical and mental – ideal for evening use

Why this strain outperforms basic autoflowers

Auto Northern Lights XXL isn’t just bigger—it’s smarter. Bred from the most productive phenotypes, it combines speed with stability. You get faster root development, better nutrient uptake, and resistance to common stressors like temperature swings and humidity spikes.

• Yields up to 650 g/m²—rare for autoflowering strains
• Stable XXL genetics ensure consistent size and production
• Low odor during growth—perfect for discreet setups
• Thrives in soil or coco, with or without additives
• Handles light training (LST) without stress setbacks

Real benefits you’ll notice from day one

From the moment it sprouts, this plant shows its vigor. You’ll see thick stems, wide internodal spacing, and rapid vertical growth. By flowering, it’s covered in resin—ready to fill your jars with dense, sticky buds. The best part? You don’t need to be an expert. It forgives mistakes, resists mold, and keeps growing even when you forget to water.

And when harvest time comes, the flavor and effect speak for themselves: smooth, sweet, and deeply calming—like the original Northern Lights, but faster and easier.

Step-by-step growing guide

1. Germinate seeds in a moist paper towel or directly in a 1.5 L pot.
2. Use a well-draining soil or coco mix—consider Coco A y B by ATAMI for optimal nutrient balance.
3. Keep light at 20/4 for autoflowering—no need to change photoperiod.
4. Apply Acti-Vera by Bio Bizz in early stages to boost root health and stress resistance.
5. Support heavy colas with stakes or a trellis net during mid-flowering.
6. Flush with plain water 7–10 days before harvest to improve taste.
7. Harvest when trichomes turn milky to amber for maximum relaxation.

Frequently Asked Questions

How much can Auto Northern Lights XXL yield outdoors?

Each plant can produce 100–200 g (3.5–7.05 oz), especially in sunny summer conditions with at least 8 hours of direct light.

Is it suitable for beginners?

Absolutely. With low difficulty, high resilience, and forgiving growth patterns, it’s one of the best autoflowers for first-time growers.

Does it smell during cultivation?

It has a low to medium odor during growth, making it discreet. The aroma intensifies after drying, especially when buds are broken.

Can I use LST or topping?

Light LST is fine, but avoid topping or FIM—autoflowers don’t recover well from aggressive pruning.

What’s the best substrate for this strain?

A rich, airy soil or coco blend works best. For coco, pair with Coco A y B to ensure balanced feeding.

Personal Experience of Pevgrow’s CEO (Alan)

I’ve tested dozens of autoflowers, but Auto Northern Lights XXL stands out. I grew it in a 20 L pot under a 600W LED, 20/4 cycle, and got 610 g/m²—on par with some photoperiods. The plant stayed healthy even when I traveled and missed a few waterings. I used minimal nutrients, just a root booster and bloom enhancer. The buds were rock-hard, glistening with trichomes, and the high was exactly what I needed after a long day: deep, full-body relaxation without mental fog. I’d grow this again in a heartbeat—especially for friends who want quality without complexity.