Also known as: seed making · open pollination · sexual reproduction breeding · producing F1 seeds

Making Regular Seeds

Producing standard (non-feminized) cannabis seeds by crossing a male plant with a female plant, the foundation of all plant breeding.

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Making regular seeds is the easiest, oldest, and most genetically honest way to breed cannabis. You put a male near a female, pollen lands on flowers, seeds form. That's it. The hard part isn't the mechanics — it's picking which parents to cross, keeping pollen from contaminating your other plants, and being patient enough to grow out the offspring to see what you actually made. Feminized and autoflower seeds get the marketing attention, but every serious breeder still works with regulars.

What regular seeds are

Cannabis is naturally dioecious — most plants are either male or female [1] Strong evidence. A "regular" seed is simply the product of sexual reproduction between a male plant (pollen donor) and a female plant (seed bearer). Offspring will be roughly 50% male and 50% female, with some natural variation [2] Strong evidence.

This is distinct from feminized seeds, which are made by reversing a female plant to produce pollen, yielding nearly all-female offspring. Regular seeds preserve normal sexual genetics, which is why breeders use them when they want to evaluate both male and female contributions to a cross.

Why growers and breeders use regulars

For breeding work. You can't develop new cultivars without males. Males carry half the genetics of every cross, and selecting good males is how breeders move traits like disease resistance, vigor, terpene profile, or flowering time forward [3] Strong evidence.

Genetic stability. Feminized seeds are made by stressing or chemically reversing a female. Some breeders argue this can carry over hermaphrodite tendencies in offspring, though the evidence is mixed Disputed. Regular seeds avoid that question entirely.

Mother plant selection. A pack of regulars gives you a wider phenotype range to hunt through than feminized seeds typically do, because you're sampling the full sexual cross rather than a selfed line.

Cost and simplicity. Making regulars requires no chemicals, no stress protocols, no reversal agents — just a male and a female in the same room.

When to start

Start planning before you flip to flower. You need:

Males typically begin shedding pollen 1-3 weeks after the light flip, slightly ahead of females [4] Strong evidence. Plan your timing so pollen is available when your chosen female is receptive (visible white pistils, but not yet in heavy bud fill).

How to do it: step by step

1. Sex your plants. Around 2-6 weeks of veg under 18/6, or within 1-2 weeks of flipping to 12/12, plants show preflowers. Males produce small ball-shaped pollen sacs; females produce pistils (white hairs) from a calyx [1] Strong evidence.

2. Isolate the male immediately. Cannabis pollen is extremely fine and travels on air currents, clothing, and pets. Move the male to a separate room with its own airflow as soon as you identify it. Many breeders use a closet, tent in a different room, or even a different building.

3. Let the male mature. Flip the male to 12/12 if it isn't already. Pollen sacs will swell over 1-3 weeks and eventually split open, releasing yellow dust.

4. Collect pollen (optional but recommended). Place a clean sheet of paper or a small glass dish under a flowering branch and gently tap. Or cut a flowering branch, place it upside down in a paper bag for 24-48 hours, and shake. Sift through a fine screen to remove plant debris. Store in an airtight container with silica gel desiccant — pollen keeps for weeks at fridge temps and months to years frozen [5] Weak / limited.

5. Prepare the female. Choose a female 2-3 weeks into flower with healthy white pistils. Decide whether to pollinate the whole plant (maximum seed count, no smokable flower) or just one branch (selective pollination — keeps the rest of the plant smokable).

6. Apply pollen. For selective pollination: turn off fans, isolate the target branch, and use a small paintbrush to dab pollen directly onto pistils. Cover the branch with a paper bag for 1-2 hours, then mist the rest of the plant with water (water deactivates loose pollen) before turning fans back on Anecdote. For whole-plant: dust pollen over all flowers and let it settle.

7. Label everything. Write the cross on a tag: `(Mother) x (Father) — pollination date`. You will forget otherwise.

8. Wait 4-6 weeks. Pistils will recede and calyxes will swell as seeds develop. Mature seeds are dark brown, often striped or mottled, and hard enough that they don't crush between fingernails. Pale green or white seeds are immature [2] Strong evidence.

9. Harvest and dry. Harvest the seeded plant as you would any flower. Pick seeds out of dried bud. Cure seeds in a paper envelope at room temperature for 2-4 weeks before storing in a cool, dark, dry place. Properly stored seeds remain viable for 5+ years [6] Strong evidence.

Common mistakes

Sources

  1. Peer-reviewed Punja, Z. K., & Holmes, J. E. (2020). Hermaphroditism in marijuana (Cannabis sativa L.) inflorescences – impact on floral morphology, seed formation, progeny sex ratios, and genetic variation. Frontiers in Plant Science, 11, 718.
  2. Book Clarke, R. C. (1981). Marijuana Botany: An Advanced Study: The Propagation and Breeding of Distinctive Cannabis. Ronin Publishing.
  3. Book Clarke, R. C., & Merlin, M. D. (2013). Cannabis: Evolution and Ethnobotany. University of California Press.
  4. Peer-reviewed Small, E. (2015). Evolution and classification of Cannabis sativa (marijuana, hemp) in relation to human utilization. The Botanical Review, 81(3), 189-294.
  5. Peer-reviewed Choudhary, N., Siddiqui, M. B., Azmat, S., & Khatoon, S. (2014). Cannabis sativa: A plant of multiple biological attributes. International Journal of Pharmacognosy and Phytochemical Research, 6(2), 379-385.
  6. Government USDA National Plant Germplasm System. Seed storage guidelines for long-term genetic resource conservation.

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Feb 20, 2026
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