Licensed Hemp Growers Text/Call for Pricing 919-410-6945
×3% Hydrogen Peroxide
Pick it up at any grocery store, drugstore (Walgreens, CVS, etc.), or online. It's in the first-aid aisle — usually under $2. Make sure the bottle says 3% — that's the standard household concentration and the only strength you need.
The soak kills bacteria and fungi on the seed surface, adds extra oxygen to the embryo, and softens the shell — all of which significantly improve germination rates compared to a plain water soak.
Germination Guide
Two methods. Click the one that matches your seeds.
Photoperiods
Watch roots appear before planting.
Autoflowers
Plant seed directly into final pot after H202 soak. Never transplant.
Important: Never Plant Directly Outside
Do not plant seeds directly in the ground outside. Germination rates will be much lower due to pests, temperature fluctuations, and uncontrolled soil conditions. Always start seeds indoors using one of the methods above.
Photoperiod Seeds - Paper Towel Method
What you need:3% hydrogen peroxide, filtered water (Brita or similar), paper towels, container with lid, spray bottle
Wash your hands thoroughly before handling seeds
Mix soak solution: 1 part 3% H2O2 to 6 parts filtered water
Soak seeds in solution for 24 hours.
Drain seeds — do not rinse
Dampen paper towel with filtered water (moist, not dripping) and lay flat in container
Place seeds on towel with at least 1 inch of space between each
Cover with a second damp paper towel — do not press down
Close container and keep in a warm, dark spot (75–80°F)
Check daily — re-moisten towel if it begins to dry out
Once taproot reaches ¼–¾ inch (typically 2–7 days), plant gently with root facing down
Why the H2O2 soak?
The hydrogen peroxide soak kills bacteria and fungi on the seed surface, provides extra oxygen to the embryo, and softens the shell. This significantly improves germination rates compared to plain water soaking.
Taproot length matters
Plant once the taproot is between ¼ and ¾ inch long. Too short and the seedling isn't ready. Too long and the root becomes fragile and prone to damage during transplanting. Check 2–3 times per day once you see activity.
Autoflowers
Autoflower Method — Plant Directly Into Final Pot
Read carefully. Autoflower roots are extremely sensitive to disturbance. Transplanting — even gently — can trigger early flowering and stunt your plant before it reaches full size.
What you need:3% hydrogen peroxide, filtered water (Brita or similar), 3–5 gallon final pot, quality soil, clear solo cup or cut plastic bottle, spray bottle
Wash your hands thoroughly before handling seeds
Mix soak solution: 1 part 3% H2O2 to 6 parts filtered water
Soak seeds in solution for 24 hours.
Drain seeds — do not wait for roots to appear and do not rinse
Fill your 3–5 gallon final pot with quality soil and moisten evenly — don't soak
Make a ½ inch hole in the center of the pot
Drop seed in and cover lightly with soil — do not pack down
Spray the soil around the seed to keep the surface moist
Cover with a clear solo cup or the top half of a cut plastic bottle to hold humidity and keep the soil around the seed from drying out.
Keep in a warm spot (75–80°F) — sprout will appear in 5–10 days
Remove humidity dome once the seedling is standing on its own
Why autoflowers are different
Autoflowers flower based on age — usually starting at 3–4 weeks — regardless of light schedule. Any root disturbance during this window can trigger early flowering, resulting in small plants and significantly lower yields. Starting in the final pot eliminates this risk entirely.
Never transplant autoflowers
There is no safe window to transplant an autoflower. The final pot is permanent from day one.
Post-Germination Care
After Seeds Sprout
Days 1–7: Gentle Care
Provide 18 hours of light daily
Keep light gentle (not too intense)
Keep soil moist, not wet
Temperature: 70–80°F
Humidity: 75% or higher (use a vented humidity dome)
Days 7–21: Strengthen Plants
Gradually increase light intensity
Add gentle airflow to strengthen stems
Start nutrients at 75% strength
Increase to 100% by day 21
Around Day 21: Transplant (Photoperiods Only)
Wait until roots fill current container
Move to 4-inch pot or larger
Handle roots gently
Do not transplant autoflowers
Weak, stretchy stems: Not enough light or airflow. Move light closer.
Yellow leaves: May need nutrients. Start feeding at low strength.
Droopy plant: Usually too much or too little water. Check soil moisture.
Our Guarantee
Germination Guarantee
We stand behind our seeds. If you follow the instructions on this page exactly and your seeds fail to germinate, we'll send replacements.
Because seeds are a natural product, germination is never 100% guaranteed — but our process has been refined over 10+ years of commercial cultivation and gives you the best possible start.
To be eligible for a replacement:
Follow the method on this page exactly as written — paper towel for photoperiod seeds, direct pot for autoflowers
The full 14 days must have passed since your soak date without germination
Your order must have been placed within the last 90 days — seeds purchased before that window have unknown storage history and are not eligible
Photo documentation is required: one photo at the soak step, one of the paper towel or pot setup, and one of the ungerminated seeds at day 14
Seeds planted directly outside are not eligible
How to submit a claim
Contact us at (919) 410-6945 or support@trianglehemp.com with your order number and photos. Replacement seeds will be shipped at no charge. Claims submitted without photo documentation cannot be processed.
Legal Requirement for Guarantee Eligibility
We can only honor our germination guarantee for growers planting in a state where home cannabis cultivation is legal, or where you can otherwise demonstrate you are growing legally. Not sure about your state? Search your state on our state by state page to see what the home grow laws are where you live.
