- ILGM strains consistently provide 25%+ THC, making them some of the most potent cannabis seeds on the market.
- Strains with high THC content like Do-Si-Dos and GSC Extreme can reach 30% THC, providing strong psychoactive effects.
- Thick, resin-filled flowers from high-THC types are great for cannagars that burn slowly because of their oil-rich makeup.
- Beginners can still cultivate high-potency strains without difficulty, especially using ILGM’s feminized and autoflower choices.
- Correct curing and good airflow significantly improve the taste and how well high-THC cannabis burns.
Growing your own weed is an impressive move—especially when you plant high-THC strains that are very impactful. With THC amounts above 25% or even 30%, these types are very potent. If you're smoking alone or sharing with friends, very strong cannabis needs a smooth, long-lasting burn. That’s why using these strains with Purple Rose Supply’s cannagar molds makes your session much better. Let’s look at six great ILGM strains, what it’s like to grow them, and why they're perfect for your next garden harvest.
Meet ILGM: Your Potent Seed Plug
When it comes to very potent weed, you want to begin with good genetics—and that’s where ILGM (I Love Growing Marijuana) is excellent. Created by experienced grower Robert Bergman, ILGM has become a well-known source in the cannabis industry for high-quality cannabis seeds. Their collection includes many high-THC strains, all thoroughly checked for stability and how well they germinate. Each package has a germination guarantee, giving even new growers confidence to plant really good seeds.
ILGM strains are mostly feminized, which means you won't waste time removing male plants. They also provide autoflower and photoperiod seed types, giving you complete choice depending on your grow setup and how much experience you have. Shipping is quick, private, and available across the U.S., so you can begin growing without any legal issues.
If you’re searching for impressive potency, flavor, and ease of growing, you’ve come to the right place.
Strain #1: Granddaddy Purple (GDP)
- THC: ~27%
- Dominance: Indica
- Flavor: Sweet grape and berry
- Effects: Relaxing, calming, great for evening use
- Grow Difficulty: Easy
A well-known name for cannabis lovers, Granddaddy Purple is a great option for relaxing and unwinding at night. Created by crossing Purple Urkle and Big Bud, this strain gets the grape soda smell from Urkle and the large harvests from Big Bud—making it beneficial for both smokers and growers.
The high affects the whole body and is very relaxing, helping with sleep and reducing stress. With trichomes that shine like sugar and deep purple colors on the buds, GDP looks amazing and is very resinous—ideal for cannagars that burn slowly.
Grow Tips:
- Works well with LST (low-stress training).
- Good for small indoor tents because it stays short and sturdy.
- Flowering time: 8–9 weeks
Strain #2: Do-Si-Dos
- THC: Up to 30%
- Dominance: Indica-dominant hybrid
- Flavor: Earthy, minty, sweet funk
- Effects: Happiness, couch-lock, nighttime relaxation
- Grow Difficulty: Moderate
Do-Si-Dos is made by combining Girl Scout Cookies with Face Off OG—two strong strains known for their powerful effects. With THC content reaching around 30%, this strain is not for new users—or at least not in large amounts. Expect strong couch-lock and deep, happy body relaxation while your mind feels very calm.
Its flavor is a mix of sweet earth, mint, and cookie dough. When smoked in a cannagar, Do-Si-Dos gives a smooth, oily smoke that coats your mouth with terpenes and your mind with thoughts like "Do I need to get up today?"
Grow Tips:
- Prefers slightly cooler temperatures when flowering to bring out its purple colors.
- Needs attention to humidity because of its thick bud structure.
- Flowering time: 8–10 weeks
Strain #3: LSD
- THC: ~25%
- Dominance: Balanced Hybrid
- Flavor: Citrus, earthy musk
- Effects: Mentally stimulating with a calm body effect
- Grow Difficulty: Easy
Even though the name might suggest it, LSD won’t cause intense hallucinations—but it’s close. This mix of Mazar and Skunk #1 has a nice balance between mental stimulation and physical calmness, often improving creativity without losing clear thinking. It's great for times alone when you want to work on something or just enjoy music.
As a plant, LSD is very easy for beginners. It’s strong, resists mold and pests well, and grows well both inside and outside.
Grow Tips:
- Grows well in mild and Mediterranean temperatures.
- Great for Sea of Green setups.
- Flowering time: 9–10 weeks
Strain #4: Green Crack
- THC: 20–25%
- Dominance: Sativa
- Flavor: Mango, pine, citrus
- Effects: Energetic, focused, uplifting
- Grow Difficulty: Moderate
Don’t let the intense name worry you—Green Crack provides an energetic high that feels more like strong coffee than a mind-altering experience. Often chosen for morning use, Green Crack keeps your mind sharp, your mood up, and your focus very clear.
Because of its energetic effects, this strain is a great choice for a party cannagar. Its tropical mango flavor makes it especially enjoyable when smoked slowly during social events or even outdoor walks.
Grow Tips:
- Needs support later in flowering because of bud weight.
- Watch humidity levels closely to prevent mold on thick Sativa buds.
- Flowering time: 7–9 weeks
Strain #5: OG Kush
- THC: ~26%
- Dominance: Hybrid
- Flavor: Earthy, pine, hash
- Effects: Happy, body-calming, balanced
- Grow Difficulty: Easy
A key part of West Coast cannabis culture, OG Kush is everything you want from a hybrid—happy, uplifting head effects followed by relaxed body feelings. OG Kush genetics have been used in many famous strains, so growing this classic strain is like experiencing cannabis history.
With its sticky, flavorful buds, OG Kush is perfect for making cannagars. The earthy, hash-like tastes combine well with cannagars that burn slowly and give a full flavor with every inhale. Great for relaxing without becoming completely inactive.
Grow Tips:
- Works well with hydroponic systems.
- Grows best in warm, sunny temperatures.
- Flowering time: 8–9 weeks
Strain #6: Girl Scout Cookies Extreme (GSC Extreme)
- THC: Up to 28%
- Dominance: Hybrid
- Flavor: Sweet dough, mint, chocolate
- Effects: Body relaxation with a fun head buzz
- Grow Difficulty: Intermediate (works well with training)
Imagine the sweet, calm effects of the original GSC, but stronger—that’s GSC Extreme. This strain provides dessert-like flavors with happy, long-lasting effects. It's great for pain relief, improving mood, and reducing stress.
Perfect for relaxing, GSC Extreme is best enjoyed in the evening. Its thick, resin-covered buds are ideal for a cannagar that burns slowly and has a lot of terpenes, making it unforgettable. This is one to enjoy with calm music and maybe some chocolate snacks.
Grow Tips:
- Moderate leaf removal improves airflow around thick buds.
- Responds well to topping and SCROG methods.
- Flowering time: 9–10 weeks
Quick Comparison Chart
| Strain | THC % | Type | Best Time to Smoke | Flavor Profile | Grow Difficulty |
|---|---|---|---|---|---|
| GDP | ~27% | Indica | Nighttime | Grape, berry | Easy |
| Do-Si-Dos | Up to 30% | Indica hybrid | Nighttime | Earthy, minty | Moderate |
| LSD | ~25% | Hybrid | Anytime | Citrus, musk | Easy |
| Green Crack | 20–25% | Sativa | Morning / Daytime | Mango, citrus, pine | Moderate |
| OG Kush | ~26% | Hybrid | Evening | Pine, earthy, hash | Easy |
| GSC Extreme | Up to 28% | Hybrid | Evening / Night | Sweet dough, chocolate | Intermediate |
Do High-THC Strains Burn Differently? (Hint: Yes)
High-THC strains usually have more trichomes, more resin, and thicker buds than strains with lower potency—and this really changes how they burn. These sticky flowers are ideal for cannagars, which need to burn for a long time, burn evenly, and keep terpenes intact.
Purple Rose Supply’s cannagar molds are specially made to maximize airflow even through very thick, sticky buds. Unlike simple joints or cigars, cannagars compress flower into a tight center around a skewer, allowing for a very slow, smooth, and satisfying burn that high-THC flower really deserves.
Crafting the Perfect High-THC Smoke Session with Purple Rose
Whether you’re smoking alone or with a group, your cannabis ritual can greatly affect the experience. Customizing your session with the right strain and burn type can improve not just the high, but the entire feeling:
- Solo chill: Choose GDP or LSD—both strains encourage thinking and calm energy.
- For group sessions: Green Crack adds energy and happiness without becoming too passive.
- Romantic setting: GSC Extreme creates the mood with sweetness and a sensual body high.
Pro tip: Let your cannagar sit for a short time (12–24 hours) after pressing to improve airflow and terpene release.
Pro Tips for Growing & Smoking These Strains
Growing high-THC weed doesn’t need to be hard. Here’s how to make sure you succeed when growing and smoking:
- Airflow Control: Thick buds need more airflow when rolled—Purple Rose molds help with this.
- Dry & Cure Properly: Cure buds for 2–4 weeks to prevent harsh smoke and get the best flavor.
- Stay Humid—but Not Too Humid: Keep jars at 55–62% RH using humidity packs.
- Trim Matters: Correct trimming improves burn, flavor, and look—don’t miss this step.
- Test Your Weed: Think about THC or terp lab testing for accuracy and confidence.
High-THC Doesn’t Mean High Maintenance
Not all high-THC cannabis seeds need experienced growers. ILGM strains are made for different grower needs—some like GDP and LSD are perfect for beginners, while GSC Extreme and Do-Si-Dos offer a challenge for more experienced growers wanting to improve. Also, ILGM provides autoflower types for even easier growing. In just 8–10 weeks, you could be harvesting your first potent batch.
Essential starter gear:
- PH meter
- Trimming scissors
- Grow lights (LEDs are efficient and productive)
- Ventilation fan and carbon filter
- Glass curing jars
Community Feature: What Are You Growing This Season?
We enjoy seeing the good weed your garden is producing—especially when used with our Purple Rose molds. Share your cured bud photos, training setups, and cannagar creations on Instagram and tag us. Whether you’re showing off frosty buds or smoking with friends, your harvest could inspire someone else to start growing.
Beyond Potency — Why These Strains improve the Experience
High-THC cannabis isn't just about getting high—it’s about creating a feeling. Whether you enjoy the dessert tastes of GSC Extreme or the energizing clarity of Green Crack, each ILGM strain provides a sensory experience that combines flavor, smell, appearance, and effect into one great smoke.
With Purple Rose Quality molds and good flame, you change potent flower into a great experience.
Ready to get better? Whether it's growing better weed or making the slowest, strongest burn, the key is quality—from seed to smoke.
References
- National Institute on Drug Abuse. (2021). Marijuana Research Report. Retrieved from https://nida.nih.gov
- Hazekamp, A. (2018). The Trouble with CBD Oil. Medical Cannabis and Cannabinoids, 1(1), 65–72.
- Swift, W., Gates, P., & Dillon, P. (2005). Survey of Australians using cannabis for medical purposes. Harm Reduction Journal, 2, 18.
