Magnum cannabis seeds - product photo

Magnum Seeds

Big Yields, Easy Grows, Sativa Energy in Every Seed

Magnum seeds deliver a sativa-dominant autoflower with a balanced 10-15% THC range — ideal for growers who want manageable potency without sacrificing yield or speed. Born from a triple-cross of Ruderalis, Indica, and Sativa genetics, this strain punches above its weight with indoor harvests reaching 550g/m² and a compact 8-9 week cycle from seed to harvest. Available from Homegrown Cannabis Co, Zamnesia, and True North Seed Bank, Magnum seeds for sale are consistently stocked across reputable seedbanks, making them easy to source at competitive prices.

Magnum is available exclusively as autoflower seeds, making it a straightforward choice for growers who want a fast, light-independent grow cycle.

Magnum Seeds — Quick Specs

AttributeValue
Strain TypeSativa-Dominant
GeneticsUnknown Ruderalis x Unknown Indica x Unknown Sativa
THC Content10–15%
CBD ContentInsignificant
Flowering Time8–9 weeks from seed
Indoor Yield450–550g/m²
Outdoor Yield250g/plant
Growing DifficultyBeginner-Friendly
Seed Type AvailableAutoflower

Buying Guide — Magnum Seeds

Where to Buy Magnum Seeds

Four seedbanks currently carry Magnum seeds online: Homegrown Cannabis Co, MNSL, Zamnesia, and True North Seed Bank. Zamnesia and True North Seed Bank are strong picks for European and North American buyers respectively, often offering multi-pack options that reduce the per-seed cost significantly. Homegrown Cannabis Co stands out for its germination guarantee and detailed seed documentation, which is particularly useful when you're buying a triple-cross strain like Magnum where verified genetics matter. MNSL tends to cater to buyers looking for smaller starter packs, making it a lower-risk entry point if you're purchasing Magnum seeds for the first time. When comparing listings, check whether the seedbank specifies the exact breeder behind the Ruderalis x Indica x Sativa cross — provenance transparency is a key quality signal for this particular lineage.

Payment, Shipping, and Guarantees

All four seedbanks accept standard payment methods including credit card, and most offer a crypto discount — typically 10–15% off — which meaningfully reduces the cost when buying autoflower seeds in bulk. Given Magnum's beginner-friendly profile and strong indoor yield potential of up to 550g/m², buying a larger pack (5 or 10 seeds) is a cost-efficient move. Zamnesia and True North Seed Bank both offer stealth shipping as standard on international orders, and Homegrown Cannabis Co backs its seeds with a germination guarantee tied to following their documented germination protocol. For a high-yield seeds variety like Magnum, a germination guarantee is worth factoring into your seedbank comparison — replacing a failed batch cuts into the value proposition of those 450–550g/m² indoor returns.

Is Magnum Worth the Price?

At its price point across these four seedbanks, Magnum represents solid value for an autoflowering sativa-dominant strain with verified beginner-friendly genetics. The 10–15% THC range positions it as a moderate-potency option — not competing with high-THC heavyweights, but well-suited for buyers prioritising yield volume and grow reliability over peak potency. Compared to other indoor seeds in the beginner autoflower category, Magnum's 550g/m² ceiling is competitive, and its 8–9 week turnaround is faster than many photoperiod sativa-dominants. For outdoor seeds buyers, the 250g/plant outdoor yield is respectable for an auto, though buyers in shorter-season climates will find the most value in the indoor specs. If you're weighing Magnum against pricier boutique autos with similar THC profiles, the wide seedbank availability and consistent stocking across MNSL and Zamnesia make it a lower-risk, high-accessibility buy.

Magnum Seeds — Frequently Asked Questions

What THC level can I expect from Magnum seeds?

Magnum seeds produce plants testing between 10–15% THC, placing it in the moderate potency range. This makes it a predictable buy for consumers who want a functional, manageable effect profile rather than maximum psychoactivity. The sativa-dominant genetics contribute to the upper end of that range under optimal conditions, but buyers should set expectations around a mid-tier THC ceiling rather than a high-potency output. CBD content is insignificant, so this is not a CBD-focused purchase.

Is Magnum a good strain for beginner growers?

Yes — Magnum is officially rated beginner-friendly, which is reflected in its broad availability across accessible seedbanks like Homegrown Cannabis Co and True North Seed Bank, both of which cater to newer growers with supporting resources. Its autoflowering format removes the complexity of light cycle management, and the 8–9 week seed-to-harvest timeline means less time managing variables. From a buying perspective, beginner-rated strains like Magnum also tend to have lower seed-to-wasted-investment risk, making larger pack purchases a more confident decision.

Magnum — is it worth the price?

For buyers prioritising yield efficiency and grow simplicity in an autoflower, Magnum delivers strong value. The 450–550g/m² indoor yield is at the high end for beginner-category autos, and its consistent availability across four seedbanks — including budget-friendly options at MNSL — means you're not paying a scarcity premium. It won't compete with premium high-THC genetics on potency, but if your buying criteria centres on reliable harvests, fast turnaround, and accessible pricing, Magnum seeds for sale represent a well-rounded purchase.

Where can I buy Magnum seeds online?

You can buy Magnum seeds from four seedbanks: Homegrown Cannabis Co, MNSL, Zamnesia, and True North Seed Bank. All four stock the autoflower version. True North Seed Bank is a reliable choice for North American buyers, while Zamnesia serves European markets with competitive shipping terms. Homegrown Cannabis Co is worth considering if germination guarantees and seed documentation are priorities for you. Compare pack sizes and current promotions across these four before purchasing — pricing and bundle availability vary and can shift seasonally.

Where to Buy Magnum Seeds

SeedbankSeed TypesReview
Homegrown Cannabis COAutoflowerRead ReviewBuy Seeds
MNSLAutoflowerRead ReviewBuy Seeds
ZamnesiaAutoflowerRead ReviewBuy Seeds
True North Seed BankAutoflowerRead ReviewBuy Seeds