EUHow we compare.
Seed brands and shops each describe their seeds their own way: THC as 18%, 20–24% or "very high", yield per plant, per square metre or per watt of light, flowering time in days or weeks. Prices come in 1-, 3-, 5-, 10- and 100-packs. Side by side, those figures don't compare. Here's how we make them comparable for you.
Prices per seed, by pack size
We show every price per seed, so a 3-pack and a 10-pack, or one shop and another, compare directly. But a seed in a 100-pack is always cheaper than one in a 3-pack, so we compare packs of the size you'd actually buy:
| Pack size | Seeds | For |
|---|---|---|
| Small | under 10 | a small garden, tent or balcony |
| Large | 10 to 25 | a larger garden |
| Bulk | more than 25 | growing many plants, or buying ahead |
Small and large are what you see by default; bulk only when you ask for it. More in the guide: price per seed.
Specs in brackets, not exact figures
THC is low, average or high; yield is low, medium or high; the same for flowering time and height. What your plants reach depends on light, weather, stress, soil, feeding and how you harvest, so an exact percentage or gram figure promises more than any seed can deliver. A bracket gives you what you can fairly compare between seed brands and shops. The bounds of each bracket: grow specs.
Who says what
Many shops copy the seed brand's spec sheet word for word, so twenty shops saying 25% THC is usually one claim, not twenty. We count a copied text once and give the seed brand's own sheet the most weight. One shop's word alone isn't enough for a claim that often comes from a template, such as "high CBD". On every seed product, Show sources lists who said what. More in grow specs. Every source we use is on our sources page.
How we group seeds by strain
We group seed products by strain name. A strain name stands for a set of genetic traits, not for one set of parent plants or one breeder: a hundred seed products called White Widow aren't the same genetics. But each seed brand selling a White Widow thinks, or hopes, its seeds come close to the others, and preferably to the original. So the name tells you what the seeds aim for, and puts them side by side for you.
We call every seed brand a breeder, because that's the word growers and shops use, whether the brand bred its genetics or bought them in. More in breeders and seed brands.
We don't claim who bred a strain: breeding histories are rarely public and hard to check. What we can check is which seed brand first sold seeds under a name, so that's what we'll tell you: who introduced the strain name, not who bred it. You then choose one seed brand's version and compare it at every shop that sells it. More in strains.
How we rank
Cheapest per seed first, among offers that ship to your country. Sold-out offers are left out; when a shop doesn't say whether a pack is in stock, the offer stays in with the label Availability unknown. When you search, the closest matches come first, then the cheapest.
Nobody can pay us for a better spot. A shop or seed brand that cuts its price moves up, and its sale shows as a discount: that's the market working for you, not paid placement. Some shops pay us a small fee when you buy through our link. It never changes the order.
Our tools and our people are on this 24/7, so the prices you see stay close to what the shops ask today.
Why it takes work
Getting this right means reading thousands of differently written seed sheets, and knowing what each figure means for a grow. That's where our team's data science and cannabis knowledge come in. Ready to choose? Compare today's prices, or start with the guide.