Buy from seed banks that publish germination test results for the specific lot they ship, print a harvest or test date on every pack, and state a replacement policy in writing. Those three habits separate a bank with real germination performance from one that repeats a marketing number. Freshness and storage decide most of the outcome, so a plain strain from a bank that rotates stock fast beats a rare strain that sat in a warehouse for two years. Check your local law before you order, because seed rules differ by jurisdiction.
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What a high germination rate actually measures
A germination percentage is a lab result: the share of seeds in a sample that produced normal seedlings under controlled conditions within a set window. Reputable testing follows published seed analysis rules that define normal versus abnormal seedlings, which keeps numbers comparable between labs. Ask whether the figure on a product page comes from a current test on the lot you are buying or from a strain average collected years ago. A strong number from a two-year-old test tells you about that lot, not about yours.
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What to look for before you order
- Lot-level test data: a test date, a sample size, and a percentage for that batch.
- Sealed packaging: opaque vials or foil packs with a moisture barrier and a crush-resistant outer box.
- A printed harvest or test date on the pack, not just a best-by year.
- A written replacement policy that covers seed which fails to germinate and names the claim window.
- Storage and shipping practice: temperature-controlled stock, padded mailers, and no exposure to heat in transit.
- Clear labeling of seed type (regular, feminized, autoflower) and the breeder behind the line.
Germination bands and what they signal
- 95 to 100 percent: fresh, tested stock with careful handling. Common at small banks that turn inventory over fast.
- 85 to 94 percent: a solid retail standard for current-season seed from a known breeder.
- 70 to 84 percent: acceptable for older lots or lines with thin seed coats, but sow a spare seed per hole.
- Below 70 percent: pass, unless the bank prices the pack as a clearance lot and says so.
A claim of 100 percent with no test date and no sample size is a marketing statement, not a measurement. Treat it as such.
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Pitfalls that cost you germination
- Buying on strain hype and skipping the pack date.
- Reading a strain-wide average as if it describes the pack in your hand.
- Storing seed in a warm kitchen drawer or a humid bathroom cabinet after delivery.
- Handling seed bare-handed and letting it dry before sowing.
- Ignoring refund terms until a run fails. Claim windows are short and often require photos.
- Ordering from a bank that ships in plain paper with no moisture barrier during hot months.
How to verify a bank's claims
Ask two questions before checkout: what is the test date on this lot, and what happens if fewer than half the seeds sprout? A bank that answers both with specifics is worth the price. A bank that answers with a strain description is not. Read the replacement terms for the definition of failure, the proof required, and the deadline for a claim.
Feminized Cannabis Seeds: How to Choose a Seed Bank
FAQ
Do higher prices mean higher germination?
No. Price tracks breeder reputation and strain rarity far more than viability. A mid-priced pack with a recent test date beats an expensive pack with no date on it.
How long do cannabis seeds stay viable?
Cool, dark, dry storage holds viability for several years in most cases. Warm and humid conditions cut that window to months. Buy from banks that keep stock refrigerated and ship in sealed, moisture-barrier packs.
Paper towel or straight into the medium?
Both work. The paper towel method lets you see which seeds failed before you commit space, while direct sowing avoids handling stress on the taproot. Pick one method and keep temperature steady.
Are feminized seeds less viable than regular seeds?
Viability tracks how a seed was produced and stored, not the sex trait. Feminized lines from careful breeders sprout at the same rates as regular seed. Poor feminization practice can produce seed with thin coats, so ask about the breeder's process.
What should I do when a pack fails?
Document the run with dated photos, keep the original packaging with the lot number, and file a claim inside the stated window. Banks that publish test data tend to honor claims without a fight.