747 by Dr. Greenthumb
Growers reach for 747 as a sativa-leaning option, a cross of Iran Indica × Northern Lights out of Dr. Greenthumb. 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 747 grows against.
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Similar strains
| Breeder | Dr. Greenthumb |
|---|---|
| Type | mostly sativa |
| Flowering time | ±63 days |
| Environment | Outdoors |
| Lineage | Iran Indica × Northern Lights |
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🧬 Explore the family: Iran Indica · Northern Lights
Ancestry Pedigree
Original Strains
Unknown or Legendary
Clone Only Strains
Unknown or Legendary
Original Strains
Growing 747: what to expect
As a sativa-leaning plant, plan for a big stretch after the flip (often 100–200%) — flip earlier than feels natural and keep training options ready. Sativa-leaning plants also generally prefer a lighter feed than heavy indicas. Growers familiar with Iran Indica or Northern Lights 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.
747 FAQ
How long does 747 take to flower?
747 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 747 an indica or a sativa?
747 is listed as mostly sativa.
What are the parents of 747?
747 was bred from Iran Indica × Northern Lights by Dr. Greenthumb.
What environment does 747 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 747? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.
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