Blue Mammoth by Barneys Farm

Blue Mammoth strain photo
Type mostly indicaFlower ±75 daysTHC 14%Cross Blue Cheese × Russia Ruderalis

Blue Mammoth, from breeder Barneys Farm, is an indica-leaning strain descended from Blue Cheese × Russia Ruderalis. Indoors it typically finishes flowering in around 75 days after the flip to 12/12. Reported THC is 14% with CBD at 1.8%. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Blue Mammoth grows against.

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BreederBarneys Farm
Typemostly indica
Flowering time±75 days
THC14%
CBD1.8%
EnvironmentOutdoors
LineageBlue Cheese × Russia Ruderalis

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🧬 Explore the family: Blue Cheese · Russia Ruderalis

Ancestry Pedigree

Blue Cheese
Barneys Farm
Cheese
Big Buddha Seeds
Cheese
Clone Only Strains
Skunk Nr1
Sensi Seeds
Afghanistan Indica
Original Strains
Blueberry
DJ Short
Blueberry Line
Unknown or Legendary
Temple Flo
DJ Short
Floral Line
Unknown or Legendary
Purple Thai
Unknown or Legendary
Highland Oxacan Gold
Unknown or Legendary
Mexico Sativa
Original Strains
Chocolate Thai
Unknown or Legendary
Thailand Sativa
Original Strains
Afghani
Unknown or Legendary
Afghanistan Indica
Original Strains
HTAF
Unknown or Legendary
Thailand Sativa
Original Strains
Afghani
Unknown or Legendary
Russia Ruderalis
Original Strains

Growing Blue Mammoth: 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 Blue Cheese or Russia Ruderalis 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.

Blue Mammoth FAQ

How long does Blue Mammoth take to flower?

Blue Mammoth typically flowers in around 75 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.

Is Blue Mammoth an indica or a sativa?

Blue Mammoth is listed as mostly indica.

What are the parents of Blue Mammoth?

Blue Mammoth was bred from Blue Cheese × Russia Ruderalis by Barneys Farm.

How strong is Blue Mammoth?

Reported THC for Blue Mammoth is 14% and CBD 1.8%. Actual potency depends heavily on environment, harvest ripeness, and cure quality.

What environment does Blue Mammoth 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 Blue Mammoth? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.

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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.