Magnum Seeds
Big Yields, Balanced Potency, Built for Speed
Magnum autoflower seeds deliver a sativa-dominant grow with 10-15% THC and indoor yields reaching 550g/m², making them one of the more productive moderate-difficulty options in the autoflower category. The mild CBD presence (0.1-0.5%) gives this strain a smoother, more balanced profile than pure THC-focused sativas, which appeals to buyers who want functional daytime effects without edge. If you want a high-output sativa auto that finishes in 8-9 weeks without demanding expert-level attention, Magnum seeds are worth a close look.
Where to Buy Magnum Seeds
Compare prices from verified seedbanks
| Seedbank | Score | Seed Types | Price | |
|---|---|---|---|---|
| Seedsman | Autoflower | From $2.30/seed | View at Seedsman → | |
| MSNL | Autoflower | From $7.00/seed | View at MSNL → | |
| Crop King Seeds | 7.2/10 | Autoflower | From $13.00/seed | View at Crop King Seeds → |
Also available at: Herbies Seeds, Seed City
Links go directly to seedbank product pages.
Magnum Seeds: Quick Specs
| Attribute | Value |
|---|---|
| Strain Type | Sativa |
| THC Content | 10-15% |
| CBD Content | 0.1-0.5% |
| Flowering Time | 8-9 weeks |
| Indoor Yield | 450-550g/m² |
| Outdoor Yield | 500-700g/plant |
| Growing Difficulty | Moderate |
| Seed Type Available | Autoflower |
Magnum Seeds: Frequently Asked Questions
What THC level can I expect from Magnum seeds?
Magnum seeds test between 10-15% THC, which places them in the moderate potency range for sativa autoflowers. The 5-point spread in that range is typical for autoflower genetics and reflects variation between phenotypes and grow conditions. The 0.1-0.5% CBD content adds a secondary cannabinoid layer that tempers the raw THC effect, so the functional experience tends to feel smoother than a pure 15% THC sativa with no CBD. Medical buyers who want to verify the CBD percentage on a specific batch should request lab documentation from MSNL, which offers tested listings on select strains in their catalog.
Is Magnum a good strain for beginner growers?
Magnum is rated moderate difficulty, which puts it one step above true beginner strains. Buyers who have completed at least one successful autoflower grow will handle it without significant issues. First-time growers who have only grown photoperiod strains should be aware that the 8-9 week autoflower cycle leaves less room to correct mistakes mid-grow compared to a photoperiod sativa. If you are buying Magnum as your first autoflower, purchasing from Herbies Seeds is worth considering given their batch-tracked stock, which reduces the risk of receiving inconsistent seeds that compound beginner errors.
Is Magnum worth the price compared to similar strains?
Magnum's value case rests on its yield-to-time ratio. At 450-550g/m² indoors over 8-9 weeks, it outperforms many sativa autos in the same price bracket that yield 350-400g/m² but take 10-12 weeks to finish. Compared to Amnesia Haze Auto or Sour Diesel Auto, Magnum costs less per seed at most retailers and finishes faster, though it concedes 5-8 percentage points of THC. For buyers running two or three cycles per year indoors, the faster turnaround on Magnum can outweigh the potency gap in total annual output. For buyers who prioritize maximum THC above all else, Magnum is not the most competitive option in its category.
Where can I buy Magnum seeds online?
Magnum autoflower seeds are available from five retailers: Seedsman, Crop King Seeds, Herbies Seeds, MSNL, and Seed City. Crop King Seeds has a published customer review score of 7.2/10 for Magnum specifically, which is the most strain-specific quality signal available across the five options. Seedsman is the best choice if you want flexible pack sizes to test before buying in volume. MSNL and Seed City are worth checking first if price is the deciding factor, as both regularly discount autoflower packs. All five ship internationally, though buyers in regions with stricter import policies should confirm current shipping terms directly with the retailer before ordering.
