Poison Ivy by Medusa
Growers reach for Poison Ivy as an indica-leaning option, a cross of White Widow × Starfighter F2 out of Medusa. Indoors it typically finishes flowering in around 60 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Poison Ivy grows against.
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Similar strains
| Breeder | Medusa |
|---|---|
| Type | indica/sativa |
| Flowering time | ±60 days |
| Environment | Outdoors |
| Lineage | White Widow × Starfighter F2 |
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🧬 Explore the family: White Widow · Starfighter F2
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Unknown or Legendary
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Unknown or Legendary
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Growing Poison Ivy: 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 or Starfighter F2 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.
Poison Ivy FAQ
How long does Poison Ivy take to flower?
Poison Ivy typically flowers in around 60 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Poison Ivy an indica or a sativa?
Poison Ivy is listed as indica/sativa.
What are the parents of Poison Ivy?
Poison Ivy was bred from White Widow × Starfighter F2 by Medusa.
What environment does Poison Ivy 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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