CBD Seeds

What are CBD seeds?

CBD seeds are cannabis seeds from strains selected so that the plant, once in flower, produces plenty of cannabidiol (CBD) and little THC. The plant makes these cannabinoids itself, mainly in the resin on its flowers, which is why the figures on each product page refer to the buds, not to the seed.

THC and CBD are the two best-known cannabinoids in cannabis. In most modern strains THC dominates; in CBD seeds, a cross with a CBD-rich line shifts the balance. That's why the product pages of our strains describe a mild, only slightly psychoactive effect that leaves your head clear, although in the balanced ones you'll still notice the THC.

Growing them is no different: you germinate and look after a CBD cannabis seed just like any other. There are two types. Feminised CBD seeds are photoperiod: the plants keep growing while you give them long days of light and flower when you switch to 12/12, or when the days shorten outdoors. CBD autoflower seeds produce plants that flower on their own a few weeks after germination. And don't confuse them with the hulled hemp seeds sold as food: those aren't for growing.

THC:CBD ratios: what 1:1, 1:2 or 1:20 mean

The THC:CBD ratio tells you how much CBD there is for every part of THC. In a 1:1 there's roughly the same of each; in a 1:2, twice as much CBD; and in a 1:20 or higher, CBD dominates and THC stays very low. The higher the second number, the less weight THC carries.

Using this figure, our 19 strains fall into three groups. All the figures come from each product page:

CBD-dominant: THC below 1%

• Gorilla Glue CBD Auto Ratio of 1:40 to 1:50, with 0.17–0.27% THC and 12–14% CBD.
• Haze Pure CBD Auto Ratio of 1:13 to 1:36, with 0.5–1% THC and 13–18% CBD.
• Grapefruit CBD Ratio of 1:22 to 1:34, with 0.7–0.9% THC and 20–24% CBD.
• Swiss Chocolate CBD 0.20–0.25% THC and around 15% CBD.
• Red Berry CBD Auto Less than 0.5% THC and 15–17% CBD.

Balanced: from 1:1 to 1:2

• White Caramel CBD Always close to 1:1, with 10–15% of each cannabinoid.
• Cheese CBD Close to 1:1, with 7–10% THC and 8–12% CBD.
• White Widow CBD Auto In its 1:1 version, 9–10% of each.
• Amnesia CBD And NYC Diesel CBD: from 1:1 to 1:2.
• Critical Mass CBD And Himalaya Gold CBD: with slightly more CBD than THC.
• Critical Green CBD From 2:1 to 1:2, so some plants may have more THC than CBD.

Rich in CBG

• Critical CBG 7–9% CBG and 0.05–0.1% THC. We explain it below.

One thing to watch when reading product pages: some write the ratio the other way round, as CBD:THC. When the White Widow CBD Auto page talks about "2:1 selections", it means plants with 10% CBD and 5% THC, which is 1:2 in THC:CBD terms. Always check which cannabinoid comes first.

All 19 CBD seeds with their THC and CBD per product page

This table brings together the THC, CBD and ratio given on the product page of each of our 19 strains, plus flowering time. The lowest in THC are Critical CBG, Gorilla Glue CBD Auto and Swiss Chocolate CBD; the highest in CBD, Grapefruit CBD, Haze Pure CBD Auto and Red Berry CBD Auto.

"Not stated" means that strain's product page doesn't give the figure. The figures are a guide: many product pages take them from our breeders' lab tests, and each plant can vary with phenotype, growing conditions and harvest timing. The Harlequin CBD page, for instance, warns that stretching flowering beyond 10 weeks can raise THC. The five strains marked as sold out aren't available right now.

Are there CBD seeds without THC?

No. No cannabis seed produces a plant with 0% THC: CBD seeds give plants with low THC, not zero THC. Our lowest-THC strains stay between 0.05% and 1% according to their product pages. And if it's the rules that worry you, that depends on your country, not on the seed.

When people search for CBD seeds without THC, they almost always want one of two things: a plant with barely any psychoactive effect, or one that meets a specific THC limit. For the first, these are our strains with the lowest THC, from lowest to highest:

• Critical CBG 0.05–0.1%.
• Gorilla Glue CBD Auto 0.17–0.27%.
• Swiss Chocolate CBD 0.20–0.25%.
• Red Berry CBD Auto Less than 0.5%.
• Grapefruit CBD 0.7–0.9%.
• Haze Pure CBD Auto 0.5–1%.

For the second, we can't promise you a figure: the final THC depends on each plant and on how you grow it, and the rules on growing cannabis and on THC limits vary from one country to another. Before you germinate, check the regulations where you live.

Nor are they certified CBD seeds. That term refers to seeds of hemp varieties listed in the European Union's Common Catalogue of Varieties, which are used in agricultural hemp farming with its own requirements. Ours are CBD-rich cannabis strains from our own selection, not varieties from that catalogue, and we'd rather tell you straight.

Critical CBG: what CBG is and how it differs from CBD

CBG (cannabigerol) is another cannabinoid in cannabis, distinct from CBD. Critical CBG is a feminised strain from the Critical family, selected for its CBG: its product page gives 7–9% CBG and 0.05–0.1% THC, the lowest in our catalogue. It isn't a CBD-rich strain, and its page doesn't give a CBD percentage.

The plant first makes cannabigerolic acid (CBGA), and from it come the precursors of THC and CBD. In most strains almost all the CBGA is converted; in a CBG-rich selection, a good part of it stays as it is. That's why Critical CBG has a different profile from the rest of this category.

In the grow room it behaves like a Critical: it comes from Critical Mass and a plant selected for its CBG, it's 70% indica and its product page rates it as easy to grow. It flowers in 7–9 weeks, usually around 8, and yields 550–750 g/m² indoors and around 600 g per plant outdoors, where it's harvested around mid-September. Its buds are dense and heavy: at the end of flowering, stake the branches and keep an eye on humidity to avoid mould.

How to choose your CBD seeds

Choose the profile first: balanced, close to 1:1, or CBD-dominant, with THC below 1% according to the product page. Then the type: photoperiod feminised if you want bigger plants and heavier harvests, or autoflower if you're after speed and a compact plant. Finally, think about your space: indoors, a balcony or the garden.

Feminised or autoflower? The 13 feminised CBD strains let you decide how much the plant grows before flowering, and they're the most productive: several top 2 metres and 800 g per plant outdoors. The 6 CBD autoflowers go from seed to harvest in around 8–10 weeks, stay compact (the product pages of Red Berry, Gorilla Glue and Haze Pure CBD Auto mention 90–110 cm) and, outdoors, give you several harvests in one season. You'll find the growing details for each type in our guides to feminised CBD seeds and CBD autoflower seeds.

Cheap CBD seeds: packs and price per seed

All 19 strains cost the same: €13 for a pack of 3, €19 for 5, €33 for 10 and €75 for 25. The more you buy, the less you pay per seed: from €4.33 in the pack of 3 down to €3.00 in the pack of 25. There are no discounts and no minimum order.

A pack of 25 costs exactly €75, so it already qualifies for free shipping. If you'd like to try several, the pack of 3 lets you compare profiles without spending much: three different strains, say a balanced one, a CBD-dominant one and Critical CBG, come to €39.

And compared with the rest of the shop? In the pack of 25, a CBD seed costs the same as a fast version seed and a little more than a regular one:

No CBD seed costs €1: if the lowest price is what you're after, you'll find it in our cheap cannabis seeds, which aren't CBD strains. Our prices are low because we buy and produce in large volumes; if you need lots of seeds, combine packs of 25 of one or several strains, and for large quantities, get in touch through our contact page. A low price doesn't mean careless packing: your seeds travel in aluminium zip-lock bags.

Buy with confidence: discreet shipping and germination guarantee

Bulk Genetics has been selling seeds since 2016, and its founders have been in the trade since 2001. We send your CBD seeds in a discreet parcel, free from €75, protected in aluminium zip-lock bags, and if any of them fail to germinate, we'll replace them.

• Discreet shipping In a plain parcel across Europe, with tracking and free from €75. Up-to-date times and costs on our shipping page.
• Germination guarantee Conditions and how to claim it in our germination guarantee.
• Pay your way Card, bank transfer or cryptocurrency. It's all in payment methods.

You can read what other customers say in our reviews and get to know us better on our about us page. To get off to a good start, read how to germinate cannabis seeds, and for the ones you don't sow, how to store cannabis seeds.

Guide reviewed by the Bulk Genetics team. Updated in October 2026.