G13 by Dr. Greenthumb
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G13, from breeder Dr. Greenthumb, is an indica-leaning strain descended from G-13. Indoors it typically finishes flowering in around 63 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real G13 grows against.
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Similar strains
| Breeder | Dr. Greenthumb |
|---|---|
| Type | indica |
| Flowering time | ±63 days |
| Environment | Outdoors |
| Lineage | G-13 |
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🧬 Explore the family: G-13
Ancestry Pedigree
Unknown or Legendary
Original Strains
Growing G13: 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 G-13 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.
G13 FAQ
How long does G13 take to flower?
G13 typically flowers in around 63 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is G13 an indica or a sativa?
G13 is listed as indica.
What are the parents of G13?
G13 was bred from G-13 by Dr. Greenthumb.
What environment does G13 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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