Thunderboldt by Sagarmatha
Bred by Sagarmatha from Yumbolt × Matanuska Tundra, Thunderboldt is an indica-leaning cannabis variety. 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 Thunderboldt grows against.
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Similar strains
| Breeder | Sagarmatha |
|---|---|
| Type | indica/sativa |
| Flowering time | ±63 days |
| Environment | Outdoors |
| Lineage | Yumbolt × Matanuska Tundra |
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🧬 Explore the family: Yumbolt · Matanuska Tundra
Ancestry Pedigree
Sagarmatha Seeds
Unknown or Legendary
Original Strains
Sagarmatha Seeds
Unknown or Legendary
Original Strains
Growing Thunderboldt: 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 Yumbolt or Matanuska Tundra 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.
Thunderboldt FAQ
How long does Thunderboldt take to flower?
Thunderboldt 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 Thunderboldt an indica or a sativa?
Thunderboldt is listed as indica/sativa.
What are the parents of Thunderboldt?
Thunderboldt was bred from Yumbolt × Matanuska Tundra by Sagarmatha.
What environment does Thunderboldt 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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