Big Tuna by Pilchards

Type mostly indicaFlower ±63 daysCross Mk-Ultra

Big Tuna, from breeder Pilchards, is an indica-leaning strain descended from Mk-Ultra. 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 Big Tuna grows against.

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Similar strains

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BreederPilchards
Typemostly indica
Flowering time±63 days
EnvironmentOutdoors, Greenhouse
LineageMk-Ultra

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🧬 Explore the family: Mk-Ultra

Ancestry Pedigree

Mk-Ultra
TH Seeds
G-13
Unknown or Legendary
Indica
Original Strains
OG Kush
Clone Only Strains
Thailand Sativa
Original Strains
Chem Dawg
Unknown or Legendary
Indica
Original Strains

Growing Big Tuna: 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 Mk-Ultra 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.

Big Tuna FAQ

How long does Big Tuna take to flower?

Big Tuna 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 Big Tuna an indica or a sativa?

Big Tuna is listed as mostly indica.

What are the parents of Big Tuna?

Big Tuna was bred from Mk-Ultra by Pilchards.

What environment does Big Tuna 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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Published by Cultivar (logmygrow.com), a structured grow journal. These reference bands are the same ones the app grades real grows against. Free to cite with a link. Some outbound product links are affiliate links — see disclosures.