The right seed bank is the one that tells you who bred the seed, when it was tested, and what happens if it fails to germinate. Buy from a seller that names the breeder and the specific lot, publishes a germination rate with a test date, ships in plain compliant packaging, and states a replacement policy in writing before you pay. Strain names and bud photos are marketing. Breeder attribution, test data, and a written viability policy are what separate a seed bank from a reseller with a logo. Check your state law first, because seed sales are not legal everywhere in the US and hemp seed and marijuana seed are regulated under different rules.

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What to look for in a feminized seed bank

• Breeder attribution. The listing should name the original breeder and the breeder's pack, not just a strain name the shop invented. White label seeds sold under a shop label are common and often fine, but the listing should say so.
• Lot and harvest data. A production date or lot code lets the bank trace a problem back to a batch. Undated stock in a re-sealable bag is a red flag.
• Germination rate with a test date. Look for a stated percentage from an in-house or third-party test, plus the date it was run. A number without a date is decoration.
• Written replacement policy. Read the exact terms: what counts as proof, the window for claims, and whether the remedy is a refund or replacement seed.
• Clear format labeling. Feminized photoperiod, feminized autoflowering, and regular seed behave differently in the garden. The listing should state which one you are buying on the pack itself.
• Discreet, tracked shipping. Tracking, plain outer packaging, and a stated dispatch window. Ask what happens if customs or a carrier intercepts a package.
• Support that answers genetics questions. A bank that can tell you the lineage, the expected stretch, and the recommended finishing time is run by people who know the catalog.

Parameter bands worth checking

Use these ranges to compare listings on equal footing rather than on the photo.

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• Germination rate: 90 percent or higher is a reasonable published target for fresh, properly stored stock. Below 80 percent, ask about the test date.
• Seed age at sale: under 12 months from harvest is ideal. Viability holds for 12 to 24 months in good storage and drops faster in warm, humid conditions.
• Flowering time, photoperiod: roughly 7 to 10 weeks indoors for most modern hybrids. Anything advertised far outside that band deserves a second look.
• Flowering time, autoflowering: roughly 60 to 90 days from seed to harvest, with less light-cycle control.
• Potency: 15 to 30 percent THC is the common range for current photoperiod hybrids. Treat a 35 percent claim as a marketing number unless a lab report is attached.
• Hemp compliance: seed sold as hemp must stay at or under 0.3 percent THC on a dry weight basis under federal rules. Ask which testing regime applies.
• Pack size: 3, 5, and 10 seed packs are standard. Single-seed sales are useful for pheno hunting but raise the per-seed cost and shrink your margin for error.

Feminized, autoflowering, or regular

Feminized photoperiod seed is produced by inducing male flowers on a female plant, so the seed carries no male chromosome and almost every plant that sprouts is female. That removes the need to sex plants and cull males, which matters for small gardens and for growers who want predictable plant counts. Autoflowering feminized seed adds a ruderalis influence that triggers flowering on a timeline instead of on a light change, which suits short seasons and tight spaces but leaves less room to fix a mistake before harvest. Regular seed is cheaper per seed and gives access to both sexes, which is required if you plan to breed or keep a male. For most home growers buying from a bank, feminized photoperiod is the default and feminized autoflowering is the choice for outdoor balconies and short summers.

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Storage and the first two weeks

Seed arrives alive and degrades quietly. Keep it in an airtight container, in the dark, at roughly 4 to 8 degrees Celsius, with a desiccant pack, and let it reach room temperature before opening to avoid condensation. Germination failures are more often a storage or handling problem than a genetics problem. Keep the medium around 21 to 26 degrees Celsius, moist but not saturated, and give the seed a dark, warm start. Handle seeds with clean hands and avoid soaking longer than the breeder recommends.

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Common pitfalls

• Buying on strain name alone, with no breeder named and no lot code on the pack.
• Comparing pack price instead of price per viable seed, which folds in germination rate and pack size.
• Ignoring state law. Some US states restrict seed sales and shipping, and importing across borders carries real risk.
• Trusting a seller who will not put the replacement policy in writing before payment.
• Storing seeds in a warm kitchen drawer or a car, then blaming the bank for poor germination.
• Assuming feminized means hermaphrodite-proof. Stress, light leaks, and heat can still push a female plant to produce male flowers.

FAQ

Are feminized seeds guaranteed to be female?

No guarantee exists, but a well-produced feminized seed lot produces female plants at rates near 99 percent under normal conditions. Stress during flower can still cause a plant to throw male flowers.

What is the difference between a seed bank and a breeder?

The breeder makes the cross and produces the seed. The bank is the retailer that stores, sells, and ships it. A good bank names the breeder and passes through the breeder's pack and lot information.

How long do feminized seeds stay viable?

Plan on 12 to 24 months in cool, dark, dry storage. Beyond that, germination drops, and older seed benefits from a scuff and a longer soak.

Can I order seeds online in the US?

It depends on your state and on whether the seed is classified as hemp or marijuana. Confirm the law where you live and where the seller ships from before you order.

Should I pay extra for autoflowering feminized seed?

Only if your season or space is short. Photoperiod feminized seed gives you more control over size and timing and usually yields more per plant.