Monster Mass by Critical Mass Collective
Listen, if you’re chasing raw yield without wanting to sacrifice the nose, Monster Mass from the Critical Mass Collective needs to be on your radar. The collective was basically built from the ground up by Critical Lee with one obsession: maxing out the legendary Skunk #1 and Afghani genetics of the original Critical Mass. They took a Select Critical Mass, smashed it into a Select Critical +, and spawned this absolute beast. It’s the foundational cornerstone for their entire line, driving everything from their Auto versions to their wild Super Mutant Mass project. And it’s not just a commercial cash cropper either; it actually carries a terp profile that's worth the jar space.
In the grow room, Monster Mass lives up to its name. Indoors, she aggressively veg-cycles and then flips into flower with an explosive stretch, finishing in an absurdly fast 45 to 50 days. But here’s the catch—you have to support her. The colas get so monstrously dense and heavy that the branches will literally snap under their own weight if you don’t trellis or stake them early. Growers frequently recommend giving her a solid FIM early on to promote multiple tops, or running her in a SCROG to maximize light penetration. Just keep your humidity strictly dialed in during late flower, because buds this chunky are prime real estate for mold if your airflow is lacking.
When you crack a cured jar, it doesn’t just smell like generic sweet green. It hits you with a heavy, pungent blast of blackberry, dark cola, and sharp citrus, backed up by that classic skunky hashish exhale. As for the smoke, she tests consistently around 18-20% THC, but it punches way above those numbers. It’s a heavy-handed, sedative, body-melting stone that will absolutely lock you to the couch for hours. So, yeah, it’s a nighttime stash for sure. But for commercial guys and basement hobbyists alike, pulling 800 grams per square meter of this quality is basically a dream come true.
🌿 Start a Monster Mass journal — free →
Similar strains
| Breeder | Critical Mass Collective |
|---|---|
| Type | mostly indica |
| Flowering time | ±48 days |
| Environment | Outdoors |
| Lineage | Critical Mass × Critical Plus |
| Descendants | Psychotropic Mass, Auto Mendo Mass, Critical Mass Collective - Purple Skunk Mass, Super Mutant Mass, Auto MASSzar, Auto Monster Mass, Auto Sour Melon Mass, Moonshine Mass, Auto MASSassin, Auto AnonyMASS, Purple Dawg MASS |
🌱 Get Monster Mass seeds →
Affiliate link — supports Cultivar at no cost to you.
🧬 Explore the family: Critical Mass · Critical Plus · Psychotropic Mass · Auto Mendo Mass · Critical Mass Collective - Purple Skunk Mass · Super Mutant Mass · Auto MASSzar · Auto Monster Mass · Auto Sour Melon Mass · Moonshine Mass
Ancestry Pedigree
Mr Nice Seedbank
Original Strains
The Seed Bank
Cultivators Choice
Original Strains
Original Strains
Dinafem
Clone Only Strains
Mr Nice Seedbank
Growing Monster 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 or Critical Plus 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.
Monster Mass FAQ
How long does Monster Mass take to flower?
Monster Mass typically flowers in around 48 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Monster Mass an indica or a sativa?
Monster Mass is listed as mostly indica.
What are the parents of Monster Mass?
Monster Mass was bred from Critical Mass × Critical Plus by Critical Mass Collective.
What environment does Monster 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 Monster Mass and something looks off? Free AI photo diagnosis →
Facts compiled from public breeder listings. Growing Monster 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.