Making Regular Seeds

Growing, buying or possessing cannabis and seeds is legal only in some places. Check the law where you live before acting on this information.

What regular seeds are

Cannabis is naturally dioecious — most plants are either male or female Strong evidence^[1]. A "regular" seed is 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 Strong evidence^[2].

This is distinct from feminized seeds, which are made by reversing a female plant to produce pollen, yielding nearly all-female offspring. Strain names ("Blue Dream," "OG Kush") refer to phenotypes, not genetics, so a regular seed of a given cultivar will still show variation in the offspring. Regular seeds preserve the full sexual genetics of both parents, which is why breeders use them to evaluate both male and female contributions to a cross.

Why growers and breeders use regulars

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

Genetic stability. Feminized seeds are made by chemically or environmentally stressing a female to reverse her sex. Breeders have historically argued that this can carry over hermaphrodite tendencies in offspring Disputed^[1]. Regular seeds avoid that concern entirely by using natural sexual reproduction.

Wider phenotype range. A pack of regulars gives you more genetic diversity to hunt through than feminized seeds typically do, because you are sampling the full sexual cross rather than a female's cloned genetics.

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

When to start

Plan your cross before you flip to flower. You need:

• A selected male that has shown desirable traits: fast growth, strong structure, good stem rub aroma, and acceptable vigor. Males do not produce flowers you smoke, so selection is based on vegetative growth, smell, and ideally the quality of their female siblings or test-cross offspring.
• A selected female ready for early pollination, ideally 2–3 weeks into 12/12 flowering. Pollinating too early can stress the plant; pollinating too late leaves insufficient time for seeds to mature.

Males typically begin shedding pollen 1–3 weeks after the light flip, slightly ahead of females Strong evidence^[4]. 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 into veg under 18/6, or within 1–2 weeks of flipping to 12/12, plants will show preflowers. Males produce small round pollen sacs clustered on leaf axils; females produce pistils (white hairs) emerging from a calyx Strong evidence^[1].

2. Isolate the male immediately. Cannabis pollen is extremely fine and travels on air currents, clothing, and pet fur. Move the male to a separate room with its own airflow as soon as you identify it — a closet, a tent in a different room, or a different building entirely. This is non-negotiable if you want to keep other plants unseed-free.

3. Let the male mature. Flip the male to 12/12 if it is not already. Pollen sacs will swell over 1–3 weeks and eventually crack open, releasing yellow pollen dust.

4. Collect pollen (optional but recommended). Place a clean sheet of paper or small glass dish under a flowering branch and tap gently. Alternatively, cut a 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 the pollen in an airtight container with silica gel desiccant. Pollen stored at refrigerator temperature remains viable for weeks; frozen pollen can remain viable for years 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 smokable).

6. Apply pollen. For selective pollination: turn off fans, isolate the target branch, and use a small paintbrush to dab pollen onto pistils. Cover the branch with a paper bag for 1–2 hours to prevent disturbance. Then mist the rest of the plant with water before turning fans back on. For whole-plant pollination: dust pollen over all flowers and allow it to settle undisturbed for 1–2 hours.

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 inside. Mature seeds are dark brown, often striped or mottled, and hard enough that they do not crush between fingernails. Pale green or white seeds are immature Strong evidence^[2].

9. Harvest and dry. Harvest the seeded plant as you would any flower. Pick seeds out of the dried bud. Cure seeds in a paper envelope at room temperature for 2–4 weeks before moving to long-term storage.

Seed storage

Properly stored seeds remain viable for 5+ years Strong evidence^[5]. Store seeds in an airtight container with silica gel desiccant in a cool, dark, dry place. The biggest killers of seed viability are heat and moisture. Refrigerator or freezer storage extends longevity further; allow frozen or refrigerated seeds to come to room temperature before opening their container to prevent condensation.

Label seeds with the cross name, parental strain names (if known), and the date of pollination or harvest. This prevents mystery packs.

Common mistakes

• Pollen contamination of other plants. The biggest disaster in seed making. Pollen on your clothes, hands, or tools can travel between rooms and pollinate plants you did not intend to breed. Shower and change clothes after handling males. Keep male and female grow spaces completely separate.
• Picking a male blindly. Do not keep the first male that shows sex. Evaluate stem rub aroma, growth rate, structure, and disease resistance. Ideally test-cross him to a known female or evaluate his female siblings before committing.
• Pollinating too late in flower. Seeds need 4–6 weeks to fully mature. Pollinating at week 5 of an 8-week cultivar leaves you with immature, low-viability seeds.
• Not labeling crosses. Every breeder has a jar of mystery seeds. Labels prevent that.
• Storing seeds warm or humid. Heat and moisture destroy viability Strong evidence^[5]. Store in a cool, dry place.
• Expecting offspring to match parents exactly. Regular seeds segregate — siblings can vary widely in height, structure, flowering time, and potency, especially from unstable or polyhybrid parents. This is normal segregation, not a defect.

Related techniques and further reading

Selfing (S1 Seeds) — creating seeds by self-pollinating a single female rather than crossing two plants.

Reversal with Silver Thiosulfate (STS) — using chemical reversal to create feminized seeds from a female plant.

Pheno hunting — growing out a batch of regular seeds to identify and select the best phenotypes for breeding or cloning.

Backcrossing (BX) — using regular seeds to cross offspring back to a parent line, locking in desired traits across generations.

Selecting Mother Plants — evaluating females for vegetative vigor, structure, and yield before committing to cloning or breeding.

Pollen collection and storage — extending the working life of a male's pollen across seasons or years through freezing and desiccant storage.

Sources

How this page was made

Related

• Backcrossing — A breeding technique used to lock in a desired trait by repeatedly crossing offspring back...
• Reversal with Silver Thiosulfate (STS) — Using STS to reverse female plants and produce all-female seeds for breeding.
• Selecting Mother Plants — Identifying and preserving the best phenotype from seed for reliable, consistent cloning.
• Selfing (S1 Seeds) — Force a female plant to produce pollen and pollinate itself to create all-female seeds.