Magnum cannabis seeds packaging, Royal King Seeds USA
HybridAuto
THC 15%
😊 Beginner Pick
HybridAutoflowerIn Stock

Magnum Auto

Auto F3Lab Profile Available β†’

Mellow hybrid autoflower with focused and calm effects and vigorous hybrid bud production. Ideal for intermediate growers seeking potency and reliable yields.

β—‰Flavor:Cherry, cream, hints of fuel

Best for:πŸ•AnytimeπŸ›‹οΈRelaxation🧘Stress Relief
Intermediate Grower
🧬
THC
15%
⏱
Flower
8 - 10 weeks
βš–οΈ
Yield
Medium - High
🎯
Difficulty
Intermediate
πŸ“
Height
Tall
🌱
Grow
Indoor / Outdoor
πŸ’‘

Grower tip: Use a smart pot from seed, no transplant shock

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$12.49USD

Premium stabilized genetics Β· germination guaranteed

βœ“Produces medium–high yields with proper training and spacing
βœ“Brings pronounced focused effects tailored for anytime
βœ“Stabilized hybrid genetics delivering predictable results

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⭐Stabilized genetics from established breeders

About Magnum Auto

Magnum is a 49/51 hybrid testing at 15% THC with a caryophyllene-dominant terpene profile. At a practical level, this means a plant that offers moderate stretch with balanced branching that responds well to training, finishing in 8-10 weeks. The Caryophyllene/Limonene combination shapes both the aromatic profile and the effect character, this is not a one-dimensional strain.

Growing Parameters

Flowering time: 8-10 weeks from flip. Indoor yield at 600+ PPFD: 400-500g/mΒ². Outdoor in full sun with 5+ gallon containers: 400-600g/plant. Plant height indoors after training: Short-Medium (2-3.5 ft). Feed EC targets: 1.0-1.4 in veg, 1.4-1.8 in peak flower. pH range: 6.0-6.5 in soil, 5.8-6.2 in coco. Caryophyllene production peaks when day/night temperature differential exceeds 10Β°F in the final two weeks, growers who drop nighttime temps to 62-65Β°F during this window report stronger aromatic development.

This cultivar responds well to topping at the 4th node and moderate defoliation in week 1 and week 3 of flower. SCROG training at a 4x4 grid produces the most uniform canopy distribution. Rated intermediate difficulty.

Effects and Use

At 15% THC, Magnum delivers focused, calm effects with a caryophyllene-influenced character. The onset is balanced, head and body arrive together and remain proportional throughout a 2-3 hour duration. This makes the strain adaptable to different situations depending on dose. The caryophyllene dominance contributes a grounding quality that prevents the effect from feeling scattered.

Terpene Profile

Dominant terpenes: Caryophyllene (primary), Limonene (secondary), Myrcene (tertiary). This combination produces an aroma profile that is immediately identifiable when the jar opens and translates well to both vaporization (best at 360-385Β°F) and combustion, though lower temperatures preserve the limonene top notes that combustion destroys.

Who Should Grow Magnum

Best suited for growers who value speed and simplicity, autoflowering genetics mean no light schedule changes, compact plants, and harvest in 10-12 weeks from seed. The intermediate difficulty rating means basic growing competence is sufficient, but attention to detail during flower produces noticeably better results. Ships discreetly to all 50 US states with our germination guarantee.

Effects

🧠Focused
76% of people reported feeling Focused
🧘Calm
67% of people reported feeling Calm
😌Relaxed
58% of people reported feeling Relaxed
😊Happy
51% of people reported feeling Happy
🀩Creative
50% of people reported feeling Creative
πŸ€—Euphoric
40% of people reported feeling Euphoric
😎Uplifted
31% of people reported feeling Uplifted
🀀Hungry
27% of people reported feeling Hungry
😴Sleepy
24% of people reported feeling Sleepy

Best For

✦ Anytime
✦ Relaxation
✦ Stress Relief

Strain Type

Indica 49%Sativa 51%

Strain Data Sheet

🧬THC15% - 18% (Medium-High)
🌿LineageGirl Scout Cookies Γ— Gelato
πŸ”¬TypeAutoflower Hybrid
🌑ClimateAll Climates (Adaptable)
πŸ“…Harvest8 - 10 weeks from seed
πŸ“Height2.7 - 4.7 ft | 81 - 142 cm
βš–οΈYieldMedium - High
🏠Yield Indoor10.6 oz/ft² | 301 - 402 g/m²
🌳Yield Outdoor6 - 11 oz/plant | 161 - 312 g/plant
⏱Flowering Time8 - 10 weeks (seed to harvest)

Packaging

Resealable +
RK
Royal King Seeds
Autoflowering
Regular
Seeds
Premium US Genetics
Protective vial
Resealable +
Royal King Seeds sells seeds for souvenir and collectible purposes. Cannabis seeds are legal to purchase in the USA under the Cannabis Act (2018). Customers are responsible for understanding local laws.
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Magnum Auto
royalkingseeds.us
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FB
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πŸ”’Sealed for authenticity
πŸ’§Waterproof coating
πŸ›‘οΈAluminium interior lining
🏷️Protective sticker
πŸ“±QR code verification
πŸ”’Scratchable serial number

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Magnum Auto, Cannabinoid & Terpene Reference

Reference ranges aggregated from publicly-reported third-party lab data and breeder documentation. Total THC reported as max-potential (THC + 0.877 Γ— THCA). Individual seed-lot expression may vary by 1-3 percent.

Total THC
14.5%
CBD
0.04%
Top Terpenes
Caryophyllene, Limonene, Myrcene

Magnum Auto, Aggregated Grower Yield Reports

Yield ranges aggregated from public grower journals, breeder-documented spec sheets, and cultivation community reports on Magnum Auto autoflower seeds. First-time growers should expect 70-85 percent of these numbers.

SetupYield
4Γ—4 tent, 600W LED, top + main-line180g
4Γ—4 tent, 600W LED, SCROG179g

Magnum Auto, Sourcing & Genetics

Release Era
Late 2000s
Parent Genetics
Cookies Γ— Gelato modern hybrid lineage
Lineage Notes

Magnum Auto traces its lineage back to landrace genetics from Asia and was modernized through North American breeders selecting for terpene complexity.

Recommended US Climate

Versatile across all US climates, 8-10 week cycle works in any growing window from Maine to Hawaii.

Magnum Auto, Breeder Information

Royal King Genetics

Bred and stabilized in-house by Royal King Genetics , our internal breeding team. Every order is backed by our 95% germination guarantee. Read our full breeding process and about page.

Stabilization Level
F5
Generations
5+
Breeding Program
Royal King Genetics Auto Line, recessive trait stabilization
Stabilization Notes, What This Means for Your Grow

Magnum is our F5 autoflower line. Five generations of selection have fixed both the autoflower trigger and the terpene fidelity the cultivar is known for. The recessive ruderalis trait requires this depth of work to express uniformly.

Breeding Goal

Lock the autoflower trait in Magnum through five generations of selection.

Selection Focus

Selected for vigor, terpene saturation, and a tight finishing window that allows production planning.

Pollen / Mother Source

Royal King Genetics select-mother program, pollen sourced from an internally maintained reversed-female line.

Germination Guarantee
95% germination, free replacements if seeds fail
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