Polar Express by Auto Seeds
Polar Express lands on the indica-leaning side of the spectrum, Auto Seeds's take on the Northern Lights Nr5 × Kush line. 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 Polar Express grows against.
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Similar strains
| Breeder | Auto Seeds |
|---|---|
| Type | ruderalis/indica/sativa |
| Flowering time | ±70 days |
| Environment | Outdoors |
| Lineage | Northern Lights Nr5 × Kush |
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Growing Polar Express: 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 Northern Lights Nr5 or Kush 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.
Polar Express FAQ
How long does Polar Express take to flower?
Polar Express 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 Polar Express an indica or a sativa?
Polar Express is listed as ruderalis/indica/sativa.
What are the parents of Polar Express?
Polar Express was bred from Northern Lights Nr5 × Kush by Auto Seeds.
What environment does Polar Express 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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