Double Black by G13 Labs
Double Black lands on the indica-leaning side of the spectrum, G13 Labs's take on the Black Domina × Black Domina line. Indoors it typically finishes flowering in around 50 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Double Black grows against.
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Similar strains
| Breeder | G13 Labs |
|---|---|
| Type | indica |
| Flowering time | ±50 days |
| Environment | Outdoors |
| Lineage | Black Domina × Black Domina |
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🧬 Explore the family: Black Domina · Black Domina
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Original Strains
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The Seed Bank
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Original Strains
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Growing Double Black: 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 Black Domina or Black Domina 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.
Double Black FAQ
How long does Double Black take to flower?
Double Black typically flowers in around 50 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Double Black an indica or a sativa?
Double Black is listed as indica.
What are the parents of Double Black?
Double Black was bred from Black Domina × Black Domina by G13 Labs.
What environment does Double Black 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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