King Kong Auto by Dr Underground – High-Yielding Autoflowering Hybrid with Fast 8–9 Week Flowering

King Kong Auto by Dr. Underground is a high-yielding autoflowering hybrid that delivers potent, resinous buds in just 8–9 weeks from seed to harvest, making it a go-to choice for fast, reliable results without sacrificing quality.

Struggling to find an autoflower that actually delivers on size, power, and flavor? Too many autos fizzle out with weak yields or bland smoke. You want something that grows fast but still hits hard and tastes amazing—something that doesn’t make you choose between speed and quality.

That frustration is real. You’ve probably tried autos that barely made a dent in your stash jar or left you underwhelmed with their lack of punch. Waiting weeks only to end up with airy buds and zero flavor? That’s not growing—it’s wasting time. And when you’re ready to level up, you need a plant that keeps up with your expectations, not one that holds you back.

Enter King Kong Auto—Dr. Underground’s answer to the weak-auto epidemic. This beast combines the legendary Ed Rosenthal Super Bud x Chronic genetics with robust ruderalis, giving you a fast, vigorous grower that packs serious resin, sky-high yields, and a complex lemon-skunk-incense aroma. Whether you’re growing indoors under lights or outdoors under the sun, this strain delivers dense, frosty buds with a fast turnaround. It’s the rare auto that impresses both beginners and seasoned growers.

Technical specifications

• Breeder / Brand: Dr Underground
• Type: Autoflowering
• Dominance: Slightly indica-dominant hybrid
• Genetics / Cross: King Kong (Ed Rosenthal Super Bud x Chronic) x Ruderalis
• Flowering time: 8–9 weeks from seed
• Outdoor harvest: Late September to early October (Northern Hemisphere)
• Indoor yield: 450–550 g/m² (15.88–19.40 oz/ft²)
• Outdoor yield: 50–150 g/plant (1.76–5.29 oz/plant)
• Indoor height: 80–110 cm (2.62–3.61 ft)
• Outdoor height: 100–130 cm (3.28–4.27 ft)
• Difficulty: Low to medium
• Structure and vigour: Vigorous growth, tight internodal spacing, strong branching
• Ideal climate: Temperate, Mediterranean, continental; tolerates mild cold and heat
• Resistance: Good resistance to mold, pests, and water stress
• Training: Suitable for LST and SOG; avoid topping or aggressive pruning
• Recommended pot: 18–27 L final pot for autos
• Light: 18–20 h daily throughout the cycle
• Temperature: 22–26 °C (71.6–78.8 °F) in veg; 20–25 °C (68–77 °F) in flower
• Humidity: 60–70% seedling; 50–60% veg; 40–50% flower
• pH: 6.0–6.5 (soil), 5.8–6.2 (coco/hydro)
• Smell in grow: Medium to high – use a carbon filter if needed
• THC: 15–20%
• CBD: approx. 1%
• Aromatic profile: Limonene, myrcene, pinene
• Flavour: Lemon, skunk, incense, with hints of Haze
• Effect: Fast, powerful, uplifting cerebral high with a relaxing body buzz – ideal for daytime or social use

If you’re just starting out: how this product helps you

King Kong Auto is forgiving and straightforward, perfect for first-time growers who want big results without the headache. It doesn’t demand perfect conditions or advanced techniques to thrive.

• Starts strong with vigorous germination and early root development
• Handles minor mistakes in watering or feeding without crashing
• Stays compact and manageable, ideal for small spaces or stealth grows
• Flowers automatically—no light cycle changes needed
• Delivers impressive yields even with basic setups

If you already have experience: why it deserves a place in your kit

For advanced growers, King Kong Auto offers precision, performance, and consistency. It’s a high-caliber auto that competes with photoperiods in yield and potency.

• Responds well to LST and SOG for maximum canopy control
• Produces dense, resin-coated buds with excellent terpene retention
• Thrives in hydro and aeroponic systems for elite growers
• Delivers a complex flavor profile that stands out in any rotation
• Perfect for rapid crop turnover or stealth outdoor harvests

Advantages and benefits for any level

• Fast 8–9 week life cycle means more harvests per year
• High resistance to mold and pests reduces stress and maintenance
• Consistent, powerful genetics from a trusted breeder
• Produces up to 550 g/m² indoors with proper care
• Rich in limonene and myrcene for a bright, earthy flavor
• Uplifting, happy high perfect for creativity or social vibes
• Easy to grow in soil, coco, or hydro setups
• Great for both indoor and outdoor cultivation

Typical mistakes this product helps you avoid

Even the best strains can go wrong—but King Kong Auto’s resilience helps you dodge common pitfalls that ruin harvests.

• Overwatering: Its strong root system tolerates occasional overwatering better than most autos
• Light leaks: Autoflowering trait means no need to stress over light schedules or 12/12 switches
• Low yields: High-yielding genetics ensure you get serious returns, even in small spaces
• Pest outbreaks: Natural resistance helps fend off spider mites and aphids
• Poor flavor: Terpene-rich profile delivers a bold, memorable smoke every time

How to grow King Kong Auto seeds

Get the most out of your King Kong Auto with this expert-backed grow guide. Whether you're new or experienced, these tips will help you maximize yield, flavor, and resin production.

Quick overview: Autoflowering · Dr Underground · 8–9 week cycle · ideal for indoor, outdoor, or greenhouse.

Safe start: Germinate in a moist, dark environment at 22–25 °C (71.6–77 °F). Transplant once the taproot is about 1 cm (0.39 in) long. For a hassle-free start, Seedbox Plagron speeds up rooting and reduces transplant stress.

Stable seedling: Keep humidity at 60–70% and use gentle light. Water lightly and ensure good drainage. Adding Bio Rhizotonic boosts root development and early vigor.

Directed growth: Maintain 18–20 h of light daily. Use 18–27 L pots for optimal root space. In sustained growth, Top Veg keeps leaves green and structure compact without excess nitrogen.

Efficient flowering: Lower humidity to 40–50% and increase airflow. Support heavy colas with stakes if needed. At peak flowering, P-Boost helps with density and a cleaner taste.

Harvest and refinement: Harvest when trichomes are mostly milky with some amber for a balanced high. Flush 7–10 days before harvest. Dry at 18–22 °C (64.4–71.6 °F) and 50–60% RH for 7–10 days, then cure in jars for 2–4 weeks.

Frequently Asked Questions

How long does King Kong Auto take to harvest?

From seed to harvest, King Kong Auto takes just 8–9 weeks, making it one of the fastest high-yielding autos on the market.

Is King Kong Auto good for beginners?

Absolutely. It’s easy to grow, forgiving of minor mistakes, and doesn’t require advanced techniques to produce impressive results.

What kind of yield can I expect outdoors?

Outdoors, you can expect 50–150 g/plant (1.76–5.29 oz/plant), depending on sunlight, climate, and care.

Does it smell strong during flowering?

Yes, it has a medium to high odor—lemon, skunk, and incense. Use a carbon filter if growing indoors discreetly.

Can I top or train King Kong Auto?

Low-stress training (LST) is fine, but avoid topping, FIM, or aggressive pruning—autos don’t recover well from trauma.

Personal Experience of Pevgrow’s CEO (Alan)

I’ve grown a lot of autos, but King Kong Auto stands out. I first tried it in a small indoor SOG setup—8 plants in 20 L pots under LED. I used LST from week 2, and by week 6, the canopy was solid. I fed it a simple coco schedule with Top Veg and P-Boost, and the buds packed on weight fast. At week 9, I harvested 520 g/m²—dense, frosty, and smelling like a citrus bomb with that classic skunk punch. For beginners, I’d recommend it because it’s bulletproof. For experts? It’s a stealth harvest machine. I’ve also grown it outdoors in late summer—short cycle, high UV, and it handled the heat like a champ. The high is fast, happy, and social—perfect for chilling with friends. If you want an auto that actually delivers, this is it.