Magnum is a high-yielding autoflower that contains significant amounts of THC. The perfect choice for those looking for a balanced Sativa high. The strain genetics remains a mystery, but it produces a powerful cerebral buzz that makes it an excellent weed for social gatherings.

Easy to grow and maintain, Magnum's appearance leans more towards Indica with a bushy profile. But, don't let the epic name fool you – she's a pleasure to grow, which we highly recommend for amateurs and experienced growers alike.

Why you should buy Magnum autoflower seeds:

  • Alluring pine tree aromas
  • Solid THC levels for an autoflower
  • A well-balanced cerebral high
  • Super easy to grow

Want to know more about Magnum autoflower seeds? Read on for details.

Growing Magnum autoflower (indoors and outdoors)

Magnum's autoflowering properties make it very easy to grow in a vast number of settings. However, the strain originated in sunny Spain – so do your best to mimic a Mediterranean summer. On the other hand, Magnum is well-suited to indoor spaces and thrives well in greenhouses if you live in a more temperate climate.


Magnum is a dream to grow indoors with controlled light, heat, and air conditions. We highly recommend ventilation systems and fans to improve air circulation and dry out excess moisture, notably for the lower branches. You can pot your plant with high-quality soil or opt for a hydroponic setup. Whatever method you pick, this is a no-nonsense plant that's easy for beginners to cultivate.

Indoor growers can boost their yields by utilizing low-stress training techniques like SOG and ScrOG. Magnum responds particularly well to trimming and pruning to thin out lower branches and promote generous bud growth. From seed to harvest, this autoflower variety grows in as little as 11 weeks.


Magnum is a hardy autoflower strain that can survive rainy, temperate summers. Still, long dry and warm weather periods with good access to sufficient daytime sunlight are the best recipe for maximum results. You can plant Magnum directly into your garden's soil or utilize a large pot for greater nutrient control. Some variation in nighttime temperatures and small bouts of wind or rain shouldn't be too much of an issue.

Tip: If your summers are prone to downpours or cold snaps, Magnum thrives in greenhouse environments as well.

Flowering time

The flowering time of the Magnum autoflower is brief, taking between just 56 to 63 days. Remember to bring down room humidity to roughly 40% during this crucial flowering stage.

Size of the plant

Magnum autoflower can be kept compact indoors with heights of between 80 to 150 cm. However, she grows much more prominent outdoors, with a potential height between 120 to 160 cm.

Magnum autoflower yield

Magnum is one of the higher-performing autoflowers when it comes to yields. Indoors, you can harvest between 350 to 400 grams per m². However, outdoors expect an average yield of 80 to 150 grams per plant. To maximize yields, consider utilizing SOG and ScrOG to push your grow space to its limit.

Magnum is a hybrid autoflower strain that delivers euphoric highs that are both relaxing and energetic. Perfect for social gatherings and parties, Magnum can stimulate and uplift the mind, bringing on bouts of giggles and laughter. While euphoric at first, it settles into a full-body relaxation, soothing the body from head to toe. There's little risk of couch-lock, making it a good daytime option.

While primarily used for recreational purposes, Magnum has a lot to offer medicinally too. Its uplifting, mood-enhancing high is excellent in the treatment of symptoms of depression or day-to-day stress.

Its measured THC content aids well when it comes to calming anxious thoughts. The more Sativa-like cerebral qualities are also excellent at treating fatigue and burn-out.

Side effects

Magnum has very few registered side effects. Its THC levels aren't too overwhelming, even in the uninitiated, yet it's still sensible to moderate your consumption. Rectify common minor discomforts like dry eyes and cotton mouth with moisturizing eye drops and plenty of hydration. Keep a bottle of water handy!

Smell and taste

Magnum has a refined and subdued flavor profile layered with sweet, earthy, and floral notes. This herbaceous strain delivers aromas of citrus, pine, and moss. Tastewise, there's more spice and sweetness on the tongue without being harsh or sour. The buds themselves are reminiscent of damp earth, producing organic odors that are relaxing and therapeutic.


Magnum has mysterious origins, leading back to covert Spanish cultivators intending on boosting autoflower yields. While its precise genetic background is unknown, this strain is predominantly Sativa (75%) with a decent chunk of Indica (25%). Despite this clear Sativa dominance, Magnum grows more Indica-like, producing a bushy Christmas tree-like shape. In addition, connoisseurseurs may spot some Kush characteristics, giving at least a slight hint to its background.

From its motherland, Spain, Magnum moved to the United States, reproduced and refined into one of today's top autoflower options that will please both Indica and Sativa fans alike. Its stable and reliable yields, as well as its compact size and healthy yield potential, make it a must-buy for home growers across the world.

Buy Magnum autoflower seeds at Weedseedsexpress

Purchase Magnum seeds today at Weedseedsexpress for a hassle-free growing experience. Whether you're an absolute beginner or certified green thumb, you can pick up the very best seeds for all experience levels. Choose from easy-grow autoflowers sourced from the very best genetics, or opt for old-school classics. Our seeds come with guarantees of both quality and germination, with worldwide delivery that's secure and discreet. What's more, our trusted support team is at hand to help you at every step of your purchase.

Pick up some Magnum autoflower seeds and discover one of the world's very best seed varieties.

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Specifications Magnum autoflowering seeds

THC level 20%
CBD level .2%
Variety 25% Indica / 60% Sativa / 15% ruderalis
Genetics Unknown
Max yield indoor 350 to 400 grams/m²
Max yield outdoor 80 to 150 grams/plant
Height indoor 80 to 150 cm
Height outdoor 120 to 160 cm
Flowering time 56 to 63 days
Fungal Resistance High
Growersprofile Beginner
Cultivation Indoor, Outdoor, Greenhouse
Climate Mediterranean, Arid, Tropical, Temperate
Flavors Citrus, Spicy, Pungent, Sweet
Effects Calming, Happy, Relaxed, Creative, Energetic, Euphoric, Giggly, Talkative, Uplifting
SOG suitable yes
SCROG suitable yes

Magnum autoflowering strain review

The latest reviews on Magnum autoflowering seeds , do you have experience with this strain? Share your experience with other customers and write a review about the Magnum autoflowering strain.

5 / 5 stars out of 2 reviews


BC (Verified customer) 2022-01-16

Fast delivery as usual...I dont know what I have to say to make people realize this is the seed bank of seed banks..I have been growing for years,, tried many companies,, and can honestly say this is the highest quality,, best service,, accurate descriptions and friendliest people I ever delt with...I have ordered over a dozen different strains from WSE and never disappointed, always impressed..100% germination...If my words and reviews arent enough to convince you to try WSE...go to my grow diaries page and see actual grows from seed to weed of their page link is:

D.A. (Verified customer) 2021-12-28

11 out of 12 germinated in my germination box, all are doing fairly well after one week. Shipping was smooth, custcare is awesome, Shanna really helped me out here.

Vincent (Weedseedsexpress) replied on 2021-12-28

Hi D.A., Thanks for leaving this splendid review! Enjoy your seeds. Cheers, Vincent

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