How reliable is your source really?

With most products, you notice right away whether they're any good. With seeds, nutrients, and other grow equipment, it's different: whether the genetics are correct only shows up at the end of a complete grow cycle - typically several months later. Whether a nutrient product is actually free of heavy metals isn't something you can see on the bottle. This delay between purchase and finding out is why it pays to evaluate the source itself - not just the individual product.

Unlike licensed pharmacies, there is no regulatory body for seed banks that checks claims in advance. Practically anyone can set up a website with a copied catalog and lifted strain descriptions within a few days. That doesn't mean most vendors are disreputable - but the barrier to entry for copycats is low, and you have to check for yourself where you buy.

In the grower community, a germination rate of 80-95% or higher is considered good standard - not a legally verified lab figure, but an experience-based value that repeats across many forums and grower reports. Individual outliers on the low side happen to every vendor occasionally; storage on the buyer's side and germination method also play a role.

What matters is the pattern, not the single case: if you repeatedly land well below 80% across multiple orders from the same vendor, that's a warning sign for the source - not for your growing technique.

A reputable germination guarantee usually requires proof - typically photos of the failed seeds, often using the classic paper towel method - within a clearly defined time window after purchase. Replacement usually comes as a resend or a credit.

One distinction is easy to overlook: a vendor with no germination guarantee at all is a smaller warning sign than one that advertises a '100% germination guarantee' but makes the claim practically unusable through a deliberately cumbersome redemption process (unrealistic deadlines, contradictory requirements, no response to inquiries). The latter is actually the bigger warning sign, because it shows the advertising claim isn't meant seriously.

The most conspicuous pattern with disreputable shops: exclusively 5-star reviews, hosted only on the vendor's own website - no trace on independent platforms like Trustpilot, Reddit, or in grow forums. A genuine, long-established vendor, by contrast, almost always has a mixed review history spread across independent platforms over several years - including critical voices. Counterintuitively, it's exactly this mix of good and bad that's the real trust signal, not the average rating.

Other concrete, easily checkable signals: Is there a verifiable business identity (real address, phone number, named operators), or just a generic Gmail address? Is payment accepted exclusively via cryptocurrency or prepayment by bank transfer, with no chance of a chargeback? Do product photos look like stock photos, and does the site design noticeably change between subpages? Can the vendor give concrete details about the breeder and lineage for genetics, or does it stay at vague marketing terms with no verifiable origin?

The same applies to nutrient and fertilizer brands: a trustworthy vendor publishes certificates of analysis (COAs) from an independent third-party lab - not from an in-house lab or one affiliated with the manufacturer, whose results, according to industry assessment, carry no independent weight.

Look for a QR code or link that leads directly to the testing lab's database, and for a batch number on the COA that actually matches the number on the packaging. Without this cross-check, a PDF certificate on the website is worth little - it could stand for any batch, or an entirely different product. How to read a COA in detail is covered in full in Reading a COA correctly.

With most products, you notice a bad purchase right away. With seeds, it's structurally different: whether the genetics are correct only shows up at the end of a complete grow cycle - and with incorrect or counterfeit genetics, you've then lost not just money, but an entire season.

That's exactly what makes well-known, expensive breeder names a preferred target for counterfeits: the brand name alone justifies a price premium, and because no one can verify authenticity before the grow, copying the catalog is especially worthwhile for disreputable vendors precisely with these premium lines.

An example from retail shows how big the gap between 'is being sold' and 'lives up to the label' can be: the testing lab SC Labs reported that over 70% of CBD products purchased at unlicensed shops in the Los Angeles area failed a subsequent independent lab test. This figure comes from a single study of a specific market and can't be applied 1:1 to every region or product category - but it illustrates vividly why 'sold online' alone is not a statement of quality, and why a genuine third-party lab COA is worth more than any advertising claim.