Critical Mass by Advanced Seeds

Critical Mass strain photo
Type mostly indicaFlower ±68 daysTHC 22%Cross Critical Mass

5 other breeders' versions of Critical Mass — compare flowering times side by side →

Critical Mass, from breeder Advanced Seeds, is an indica-leaning strain descended from Critical Mass. Indoors it typically finishes flowering in around 68 days after the flip to 12/12. Reported THC is 22%. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Critical Mass grows against.

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Similar strains

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BreederAdvanced Seeds
Typemostly indica
Flowering time±68 days
THC22%
EnvironmentOutdoors
LineageCritical Mass

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🧬 Explore the family: Critical Mass

Ancestry Pedigree

Critical Mass
Mr Nice Seedbank
Afghanistan Indica
Original Strains
Skunk Nr1
The Seed Bank
Skunk Nr1
Cultivators Choice
Afghanistan Indica
Original Strains
Mexico Sativa
Original Strains
Colombia Sativa
Original Strains

Growing Critical Mass: 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 Critical Mass 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.

Critical Mass FAQ

How long does Critical Mass take to flower?

Critical Mass typically flowers in around 68 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.

Is Critical Mass an indica or a sativa?

Critical Mass is listed as mostly indica.

What are the parents of Critical Mass?

Critical Mass was bred from Critical Mass by Advanced Seeds.

How strong is Critical Mass?

Reported THC for Critical Mass is 22%. Actual potency depends heavily on environment, harvest ripeness, and cure quality.

What environment does Critical Mass 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 Critical Mass? 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.