M-39 Cannabis Seeds Feminized
M-39 is a feminized, Indica-dominant strain voted one of the top 10 Canadian strains of all time by High Times, originally released by one of Holland's oldest (now retired) seed banks. It tests at approximately 18.5% THC, flowers in a fast 39–43 days, and yields around 350–450 g indoors or up to ~500 g outdoors. Plants are low-growing, discreet, fast-branching, and easy to trim, with strong tolerance for the shorter seasons and harsher conditions of northern climates — a long-time staple among Canadian growers from Quebec to Ontario and beyond.
Important: This Is an F2 Pack — Three Possible Phenotypes
M-39 is sold here as an F2 cross, meaning each seed can express as one of three distinct phenotypes: Skunk #1, Northern Lights, or true M-39. This makes the pack a great choice for growers interested in phenotype hunting, but it also means you won't know exactly which plant you're growing until it matures. Full specs for all three possible outcomes are below.
Phenotype 1: M-39
| Detail | Info |
|---|---|
| Type | Indoor / Outdoor |
| Growing Level | Easy |
| Flowering Time | 39–43 days |
| Indica / Sativa | Indica |
| Effect | Body buzz (high) |
| THC | ~18.5% |
| Indoor Yield | ~350–450 g |
| Outdoor Yield | ~500 g |
Phenotype 2: Skunk #1
| Detail | Info |
|---|---|
| Type | Indoor / Outdoor |
| Growing Level | Moderate |
| Flowering Time | 8–9 weeks |
| Outdoor Harvest | Mid-October |
| Indica / Sativa | Mostly Sativa |
| Effect | Cerebral high |
| THC | ~14–16% |
| Indoor Yield | ~350–450 g |
| Outdoor Yield | ~550 g |
Phenotype 3: Northern Lights
| Detail | Info |
|---|---|
| Sex | Feminized |
| Variety | Mostly Indica |
| Where to Grow | Indoor, Outdoor |
| Flowering Time | 7–8 weeks |
| THC | 15%+ |
| Indoor Yield | Up to ~350 g |
| Outdoor Yield | ~450 g |
Growth Characteristics (True M-39)
Clones and grows quickly with good branching, finishing with an easy-to-trim structure. Low-growing and discreet, with a fast harvest and strong resilience through shorter growing seasons and harsher northern conditions.
A Note on Imitations
The breeder cautions that buds sometimes sold as "Blasters" are often poorly grown-out versions of M-39, or other strains mislabeled as M-39. Authentic M-39 is known for a distinct old-school flavor and a clean high recognizable to growers and smokers familiar with the classic strain.
Effects
M-39's effect is reported as a body buzz high. The source notes it's well suited to social settings with easy, free-flowing conversation, sometimes followed by a need to rest afterward.
Effects vary by person, dose, and which of the three phenotypes you end up growing. Not medical advice.
Frequently Asked Questions
What is M-39? A feminized, Indica-dominant strain sold as an F2 pack, meaning it can produce one of three phenotypes: true M-39, Skunk #1, or Northern Lights.
Will I know which phenotype I'm growing? Not until the plant matures and shows its characteristics — this pack is popular specifically for phenotype hunting.
How much THC does M-39 have? The true M-39 phenotype tests at approximately 18.5% THC.
How long does it take to flower? True M-39 flowers in a fast 39–43 days; the Skunk #1 and Northern Lights phenotypes take longer (8–9 weeks and 7–8 weeks respectively).
What's the yield? Varies by phenotype — see the tables above for each.
Legal Disclaimer
Cannabis laws differ by location. Buyers must know and follow all local, provincial/state, and federal laws before buying, holding, germinating, or growing cannabis seeds. These products are for adults 18+ (or as required by law) only where legal. We do not support or promote illegal activity. THC, flowering time, effects, and yield figures are estimates, not guarantees — actual results depend on the plant, phenotype, climate, growing setup, and grower experience.
- Availability: 9 In Stock
- Model: Q.C.S.
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