Gorilla Glue 4 Strain Review: Complete Growing Guide

Few strains have achieved the legendary status of Gorilla Glue #4. This powerhouse cultivar has won multiple Cannabis Cup awards and earned a devoted following for its incredible potency, unique aroma, and generous resin production. This comprehensive guide covers everything you need to know about growing GG4 successfully.

Strain Overview

Origins and Genetics

Lineage: Chem's Sister × Sour Dubb × Chocolate Diesel

The origin story of GG4 is the stuff of cannabis legend. Created accidentally when a hermaphroditic Chem's Sister pollinated a Sour Dubb plant, breeder Joesy Whales nearly threw out the seeds. Fortunately, he didn't—those seeds became one of the most celebrated strains in modern cannabis history.

Genetic profile:

• Type: Balanced hybrid (slight indica lean)

• Indica/Sativa: Approximately 50/50

• THC: 25-30%+ (extremely potent)

• CBD: <1%

What Makes GG4 Special

The glue effect:
GG4 gets its name from the incredibly sticky resin that coats every surface of the plant. Trimming sessions require constant scissor cleaning—the "glue" is no joke.

Award-winning pedigree:

• 2014 High Times Cannabis Cup: 1st Place Hybrid

• Multiple other awards across competitions

• Consistently ranked among top strains worldwide

Unique terpene profile:
The combination of its parent strains creates an unmistakable aroma that's complex, pungent, and instantly recognizable.

Growing Difficulty Assessment

Overall difficulty: Intermediate

Challenges:

• Heavy feeders requiring careful nutrition

• Stretch can be significant during flower

• Dense buds need good airflow (mold prevention)

• Extremely sticky—trimming is labor-intensive

Advantages:

• Relatively pest and mold resistant (when properly managed)

• Forgiving of minor mistakes

• Clear visual indicators of plant health

• Responds well to training

Optimal Growing Conditions

Indoor Growing

Environment:

• Temperature: 68-80°F (20-27°C)

• Humidity veg: 50-70%

• Humidity flower: 40-50% (lower in late flower)

• VPD: 0.8-1.2 kPa throughout

Lighting:

• Minimum: 400-600 PPFD during flower

• Optimal: 800-1000 PPFD at canopy

• Light schedule veg: 18/6 or 20/4

• Light schedule flower: 12/12

Space requirements:

• Height: Plan for 3-5 feet finished height

• Stretch: 50-100% during flower transition

• Spacing: Allow good airflow between plants

Outdoor Growing

Climate preferences:

• Warm, Mediterranean-type climates

• Can handle temperature variations

• Needs protection from excessive rain in flower

• Harvest window: Mid-October (Northern Hemisphere)

Outdoor considerations:

• Full sun location essential

• Support structures recommended for heavy colas

• Natural pest pressure manageable

• Excellent yields possible with proper care

Growth Stages

Germination (5-10 days)

GG4 seeds typically germinate reliably:

• Paper towel method works well

• Direct soil planting successful

• Keep temperatures 70-80°F

• Tap root appears within 2-5 days

Pro tip: GG4 seedlings can be vigorous—don't overwater in early stages.

Seedling Stage (1-2 weeks)

Characteristics:

• First true leaves appear quickly

• Good early vigor

• Moderate water needs

• Light feeding can begin late in stage

Care requirements:

• Mild lighting (300-400 PPFD)

• High humidity (65-70%)

• Light watering only when needed

• No or very light nutrients

Vegetative Stage (4-8 weeks)

Growth patterns:

• Vigorous lateral branching

• Sturdy stems that support training

• Medium-sized fan leaves

• Good node spacing

Training recommendations:

• LST works exceptionally well

• Topping recommended (creates excellent structure)

• SCROG ideal for maximizing yield

• Mainlining/manifolding very effective

Feeding in veg:

• Medium-heavy nitrogen needs

• Good calcium and magnesium uptake

• Watch for signs of overfeeding

• Responds well to organic feeding

Flower Transition (Week 1-2)

The stretch:

• Expect 50-100% height increase

• Most stretch occurs weeks 1-3 of flower

• Branches elongate significantly

• Keep training up through early stretch

Transition care:

• Begin reducing nitrogen

• Increase phosphorus and potassium

• Watch VPD carefully

• Maintain good airflow

Early Flower (Weeks 3-4)

Development:

• Flower sites developing rapidly

• Resin production beginning

• Aroma becoming noticeable

• Structure becoming clear

Care focus:

• Full bloom nutrients

• Humidity beginning to decrease

• Light intensity at maximum

• Watch for deficiencies

Mid Flower (Weeks 5-6)

Characteristics:

• Buds stacking heavily

• Resin production accelerating

• Intense aroma development

• Color changes may begin

The glue appears:
This is when GG4 earns its name. Expect:

• Extremely sticky buds

• Trichomes on everything (leaves, stems)

• Difficult to handle without gloves

• Scissors gumming within minutes

Care focus:

• Peak nutrition needs

• Humidity 45-50%

• Support for heavy branches

• Defoliation if needed for airflow

Late Flower (Weeks 7-9)

Ripening:

• Trichomes transitioning (cloudy to amber)

• Fan leaves fading naturally

• Calyxes swelling

• Final weight development

Flush considerations:

• Begin reducing nutrients week 7-8

• Plain water final 1-2 weeks

• Watch for deficiency during flush (normal)

• Prepare for harvest

Flowering Time

Indoor: 8-9 weeks typical
Outdoor: Ready mid to late October

Some phenotypes may run longer (10 weeks). Monitor trichomes carefully rather than counting days.

Harvest Indicators

Ready to harvest when:

• Trichomes: 70-80% cloudy, 10-20% amber

• Pistils: 70-80% darkened/receded

• Calyxes: Swollen and mature

• Fan leaves: Fading naturally

Effect of harvest timing:

• Earlier harvest (more cloudy): More energetic, less sedating

• Later harvest (more amber): More relaxing, potentially couchlock

• GG4 is often harvested with 15-20% amber for full effect

Yield Expectations

Indoor Yields

Per plant: 1-2 ounces (moderate training)
Per plant (heavy training): 2-4+ ounces
Per square foot: 1.5-2 ounces average
Per square meter: 500-600 grams

Outdoor Yields

Per plant (ground): 1-3 pounds possible
Per plant (container): 0.5-1.5 pounds

Yields vary significantly based on:

• Growing method and training

• Light intensity and duration

• Nutrition program

• Grower experience

• Phenotype variation

Feeding GG4

Nutrient Requirements

Veg feeding:

• NPK ratio: 3-1-2 or similar

• CalMag supplementation recommended

• Medium-high feeding frequency

• Watch for nitrogen toxicity (claw leaves)

Flower feeding:

• NPK ratio: 1-3-2 transitioning to 0-3-3

• Continue CalMag through mid-flower

• Reduce nitrogen significantly

• PK boost beneficial weeks 4-6

Common Nutrient Issues

Calcium deficiency:

• Common in GG4, especially in coco

• Supplement CalMag throughout

• Watch for brown spots on new growth

Nitrogen toxicity:

• GG4 can handle less N than expected

• Dark, clawing leaves indicate excess

• Reduce N early if symptoms appear

Organic vs. Synthetic

GG4 responds well to both approaches:

Organic advantages:

• Enhanced terpene expression

• Potential flavor benefits

• More forgiving of mistakes

Synthetic advantages:

• Precise control

• Faster correction of deficiencies

• Potentially higher yields

Training Techniques for GG4

Recommended Methods

Topping:

• Top after 4-5 nodes

• Creates excellent bushy structure

• Multiple tops = multiple large colas

• GG4 recovers quickly from topping

Low stress training (LST):

• Highly effective with GG4

• Exposes lower bud sites

• Creates even canopy

• Maximizes light penetration

SCROG (Screen of Green):

• Ideal method for GG4

• Maximizes yield per square foot

• Controls height effectively

• Requires veg extension

Lollipopping:

• Remove lower growth before flower

• Concentrates energy on main colas

• Improves airflow

• Reduces larfy popcorn buds

Pest and Disease Resistance

Natural Resistances

GG4 shows good resistance to:

• Spider mites (moderate resistance)

• Common molds (when humidity controlled)

• General environmental stress

• Minor nutrient fluctuations

Vulnerabilities

Watch out for:

• Bud rot in dense colas (humidity control critical)

• Powdery mildew in high humidity

• Root issues if overwatered

Prevention Strategies

• Maintain proper humidity throughout
• Ensure excellent airflow
• Defoliate strategically for air movement
• Regular plant inspection
• IPM program during veg

Drying and Curing GG4

Special Considerations

The stickiness challenge:

• Extremely difficult to trim

• Scissors need constant cleaning

• Gloves are essential

• Consider dry trimming to reduce stickiness

Drying:

• 60°F (15°C), 55-60% humidity

• 10-14 days ideal for GG4

• Slower dry preserves terpenes

• Sticky buds take longer to dry properly

Curing:

• Minimum 2-4 weeks

• 6+ weeks ideal for GG4

• Humidity 58-62% in jars

• Burp regularly for first two weeks

Effects and Characteristics

The GG4 Experience

Effects:

• Powerful, long-lasting high

• Initial euphoria and uplift

• Transitions to deep relaxation

• Potential couch-lock at higher doses

Medical applications:

• Pain relief

• Stress reduction

• Insomnia help

• Appetite stimulation

Flavor and aroma:

• Pine and diesel dominant

• Earthy, chemical undertones

• Chocolate notes from Diesel parent

• Extremely pungent—odor control essential

Growing GG4: Final Tips

Keys to Success

• Don't overfeed: GG4 needs less than you might think
• Control humidity: Especially critical in flower
• Support branches: Those colas get heavy
• Plan for stickiness: Have supplies ready for trim
• Be patient with cure: GG4 improves significantly

Common Mistakes to Avoid

• Overwatering (GG4 likes slightly drier conditions)
• Too much nitrogen in flower
• Insufficient airflow in dense canopy
• Harvesting too early (let it finish)
• Rushing the cure

Tracking Your GG4 Grow

Document your GG4 grows in StrainTrakker:

• Record feeding schedules and amounts

• Track environmental conditions

• Note training techniques used

• Log any issues and solutions

• Compare yields across grows

This data helps you optimize future GG4 grows for even better results.

Conclusion

Gorilla Glue #4 has earned its legendary status. Growing this strain rewards you with incredible potency, unique flavors, and impressive yields—if you give it proper care. The sticky resin that makes trimming challenging is the same resin that delivers its powerful effects.

Whether you're growing GG4 for the first time or refining your approach, tracking your grow in StrainTrakker helps you learn what works best for this exceptional strain. Document everything, from nutrient schedules to environmental conditions, and watch your GG4 grows improve with each cycle.

Happy growing, and prepare for some seriously sticky scissors!