Critical Mass by Zoo Seeds
5 other breeders' versions of Critical Mass — compare flowering times side by side →
Critical Mass lands on the indica-leaning side of the spectrum, Zoo Seeds's take on the Critical Mass line. Indoors it typically finishes flowering in around 50 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Critical Mass grows against.
🌿 Start a Critical Mass journal — free →
Similar strains
| Breeder | Zoo Seeds |
|---|---|
| Type | mostly indica |
| Flowering time | ±50 days |
| Environment | Outdoors |
| Lineage | Critical Mass |
🌱 Get Critical Mass seeds →
Affiliate link — supports Cultivar at no cost to you.
🧬 Explore the family: Critical Mass
Ancestry Pedigree
Mr Nice Seedbank
Original Strains
The Seed Bank
Cultivators Choice
Original Strains
Original Strains
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 50 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 Zoo Seeds.
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.
📷 Growing Critical Mass and something looks off? Free AI photo diagnosis →
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.
Track your own grow free — the journal grades your environment against these bands →
Get the one-page grow reference card
VPD, pH by medium, deficiency symptoms and dry/cure targets on a single printable page. Free — plus the occasional grow-data breakdown. No spam, unsubscribe in one click.