Black Widow

Black Widow Seeds — Original Mr. Nice Genetics Since 1994

Black Widow is a regular cannabis seed from Mr. Nice Seeds — the original Brazilian Sativa x South Indian Indica cross that Shantibaba bred to win multiple awards starting in 1994. This 15-pack of regular (non-feminised) Black Widow seeds gives you proper breeding stock: expect both males and females, a roughly 10-week flowering time, and heavy resin production from plants that grow well indoors and outdoors. These aren't renamed clones or diluted F4 genetics — this is the real thing, direct from the breeder who made the strain famous.

Why Black Widow Seeds Belong in Your Collection

There's a reason this strain has been winning cups since 1994 and growers still come back to it three decades later. Black Widow was the strain that put Shantibaba on the map — and unlike a lot of "classic" genetics floating around, Mr. Nice hasn't diluted these through endless backcrossing or feminisation shortcuts. You're getting the same Brazilian Sativa x South Indian Indica cross that earned the original awards.

The resin production on Black Widow is genuinely impressive. The South Indian Indica parent brings dense trichome coverage, while the Brazilian Sativa contributes structure and flavour complexity. We've seen growers pull sticky, frosted flowers from these genetics even on a first run — it's a forgiving strain that doesn't punish small mistakes the way some finicky hybrids do. The smoke is smooth and flavourful, with a depth that comes from having two distinct landrace-adjacent parents rather than a narrow genetic base.

The one honest caveat: regular seeds mean work. You'll spend the first couple of weeks of flowering sexing plants and pulling males. If you've never grown regular seeds before, it's not difficult — male flowers look like small clusters of balls at the nodes — but it does require daily attention during that window. Miss a male and you'll end up with seeded buds. That said, the upside of regulars is real: you get to pheno-hunt, find a standout mother, and keep her in clone indefinitely. Feminised seeds can't give you that.

Growing Black Widow Seeds — What to Expect

Black Widow seeds grow well both indoors and outdoors, flowering in approximately 10 weeks indoors. Outdoors in a northern European climate, expect to harvest around mid to late October depending on your latitude and weather. The Sativa influence means plants can stretch during the first few weeks of flower — give them room or train early if your ceiling height is limited.

1. Germinate your Black Widow seeds using the paper towel method or directly in a starter plug. Keep temperatures between 22–26°C and maintain moisture without waterlogging.
2. Transplant seedlings into their final containers once they've developed 2–3 sets of true leaves. A 10–15 litre pot works well for indoor grows; outdoor plants benefit from larger containers or direct ground planting.
3. Veg for 3–5 weeks under 18/6 light. Black Widow responds well to topping and low-stress training — the branchy structure from the Sativa side takes well to being spread out.
4. Flip to 12/12 and watch closely for sex during the first 10–14 days. Remove males as soon as you spot pollen sacs. Mark any standout females for potential mother selection.
5. Expect roughly 10 weeks of flowering. The resin production ramps up significantly in the final 2–3 weeks — patience pays off here. Don't chop early.
6. Flush for the final 7–10 days if growing in soil or coco. Harvest when trichomes show a mix of milky and amber under magnification.

One thing we'd flag: Black Widow's resin output makes her a magnet for mould in humid conditions. If you're growing outdoors in a damp climate or indoors without proper ventilation, keep your humidity below 50% during late flower. A decent extraction fan and carbon filter setup isn't optional — it's the difference between a successful harvest and heartbreak.

Black Widow Seeds — Specifications

How Black Widow Compares to Other Mr. Nice Seeds

If you're browsing the Mr. Nice catalogue and wondering where Black Widow fits, here's the short version: it's the flagship. The genetics are older and more stable than most of their newer crosses, which means less phenotypic variation between plants. You're more likely to get consistent results from a pack of Black Widow than from a more experimental F1 cross. For growers who want heavy resin production with a smooth, flavourful smoke, Black Widow is the best Mr. Nice strain to start with — it's the one Shantibaba built his reputation on, and there's a reason it's still in the catalogue after 30 years.

Compared to feminised seeds from other banks, regular Black Widow seeds ask more of you upfront but give you something feminised genetics can't: the ability to find and keep an exceptional mother plant. If you're serious about building a garden rather than just running a single crop, 15 regulars is a better investment than 5 feminised seeds of questionable lineage.