EP 25▶ 3:13Germination & seedlings
Do Bigger Seeds Grow Bigger Plants? (What the Research Shows)
Every pack has big seeds and small ones, and plenty of growers plant the biggest first.
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Seed Science
The genetics, germination and breeding of cannabis seeds, explained with the research. Every episode is a short video and a full article, with its sources.
Latest · Episode 25Germination & seedlings
Do Bigger Seeds Grow Bigger Plants? (What the Research Shows)
Every pack has big seeds and small ones, and plenty of growers plant the biggest first. A Cornell team sorted hemp seeds by size and measured what grew. Other studies asked the bigger question: does the head start last?
Read and watchEP 25▶ 3:13
EP 24▶ 3:08Autoflowers
Why Is My Autoflower So Small? (The First 4 Weeks Decide It)
An autoflower doesn't wait until it is big enough.
EP 23▶ 3:36Autoflowers
Does Pot Size Matter for Autoflowers? (What the Research Says)
Does a bigger pot really mean a bigger harvest?
EP 22▶ 3:33Growing
Does Purple Mean More Potent? What the Research Shows
Your plant is turning purple.
EP 21▶ 3:28Germination & seedlings
The Best Way to Germinate Seeds? What the Lab Studies Show
Paper towel, soil, or a glass of water?
EP 20▶ 4:34Genetics & breeding
Are Triploid Seeds Worth It? (What the Research Shows)
Triploid seeds promise flowers that stay seedless even when stray pollen blows in.
EP 19▶ 5:16Germination & seedlings
Why Your Seedlings Stretch (And the Free Fix That Stops It)
Long, pale, floppy stems are one of the commonest problems in a young grow.
EP 18▶ 4:42Growing
Do Mycorrhizal Fungi Actually Help Your Plants? (What the Science Says)
Under every healthy plant there is a second root system, and it isn't a plant.
EP 17▶ 4:54Germination & seedlings
7 Seed Myths You Still Believe (What the Science Says)
Almost everything you can see on a seed belongs to its mother, not the plant inside it.
EP 16▶ 4:24Genetics & breeding
How a New Cannabis Strain Is Made (Step by Step)
Every strain began with two parents and a wish list.
EP 15▶ 4:19Autoflowers
Every Autoflower Has the Same Typo in Its DNA
Regular cannabis waits for long nights before it flowers.
EP 14▶ 4:26Genetics & breeding
Indica vs Sativa: What the DNA Actually Says
For decades we have called them sativa and indica.
EP 13▶ 4:14Genetics & breeding
Why "Feminised" Plants Still Make Pollen (The Science of Hermaphrodites)
You bought feminised seeds, then in week five of flowering you find pollen.
EP 12▶ 3:59Genetics & breeding
Afghani: The Landrace Behind Almost Every Strain
Short, stocky, fast to finish and covered in resin: the plants we now call indica trace back to one corner of Central Asia.
EP 11▶ 2:35Autoflowers
5 Autoflower Mistakes Every Grower Makes (Explained by Genetics)
Autoflowers are sold as the easy option, so why do so many end up tiny and stunted?
EP 08▶ 3:15Genetics & breeding
Same Strain, Different Smell: The Genetics of Cannabis Aroma
Two plants, same strain, same seed pack.
EP 07▶ 3:18Genetics & breeding
Landraces: Where Cannabis Seeds Really Came From
Long before strain names and seed banks there were places: mountain valleys and tropical fields where cannabis was grown, saved and replanted for centuries.
EP 06▶ 3:25Genetics & breeding
Phenotypes: Why Seeds From the Same Pack Grow Differently
Plant ten seeds from the same pack: one grows tall, one stays short, one turns purple, one smells completely different.
EP 05▶ 3:55Germination & seedlings
How Long Do Cannabis Seeds Really Last? What the Science Says About Storing Seed
In one long-running study, cannabis seeds kept warm and slightly damp were all dead within 18 months, while cool, dry seeds were still germinating years later.
EP 04▶ 3:24Germination & seedlings
Germination: What Really Happens Inside a Sprouting Seed?
A cannabis seed can sit in a drawer for years, barely breathing.
EP 03▶ 3:52Autoflowers
Autoflowers: The Plant That Ignores the Sun (Science & History)
Most cannabis waits for long nights before it flowers.
EP 02▶ 3:04Genetics & breeding
F1, S1, BX: What Your Seed Pack Is Really Telling You
F1, F2, IBL, S1, BX3: the codes on a seed pack are not marketing fluff.
EP 01▶ 3:33Genetics & breeding
How Feminised Seeds Are Made (The Science, Explained)
Plant ten regular seeds and about half grow up male.