Black Widow by Mr. Nice
3 other breeders' versions of Black Widow — compare flowering times side by side →
Black Widow is an indica-leaning cannabis strain from Mr. Nice, bred by crossing White Widow. Indoors it typically finishes flowering in around 70 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Black Widow grows against.
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Similar strains
| Breeder | Mr. Nice |
|---|---|
| Type | indica/sativa |
| Flowering time | ±70 days |
| Environment | Outdoors, Greenhouse |
| Lineage | White Widow |
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🧬 Explore the family: White Widow
Ancestry Pedigree
Green House Seeds
De Sjamaan
Original Strains
Original Strains
Growing Black Widow: what to expect
As an indica-leaning plant, expect a modest stretch after the flip (roughly 50–100%) and dense bud structure — which makes late-flower humidity discipline the main risk: keep RH in the 40s once buds fatten to stay ahead of mold. Growers familiar with White Widow will recognize much of its behavior. Whatever the listing says, the cut in YOUR tent is the ground truth: log feedings, readings, and photos, and let the trends — not the label — drive decisions.
Black Widow FAQ
How long does Black Widow take to flower?
Black Widow typically flowers in around 70 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Black Widow an indica or a sativa?
Black Widow is listed as indica/sativa.
What are the parents of Black Widow?
Black Widow was bred from White Widow by Mr. Nice.
What environment does Black Widow like?
Standard cannabis bands work well: VPD 0.8–1.1 kPa in veg and 1.0–1.4 kPa in flower, with humidity stepping down from 65–75% as a seedling to 40–50% in late flower. See the stage-by-stage table on this page.
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Facts compiled from public breeder listings. Growing Black Widow? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.
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