Cannabis Seeds Store | The Vault.

Monster Mass Feminised by Critical Mass Collective is a legendary, fast-flowering cannabis seed variety that helped define the brand’s love for big-yielding, flavour-heavy hybrid genetics. Created from Select Critical Mass x Select Critical+, this Indica/Sativa feminised strain combines rapid flowering speed, serious production potential and a huge fruity-skunk aroma that makes its name feel more than deserved.

With its overpowering fruit, pungent skunk, sweet blackberry notes and deeply relaxing full-body effect, Monster Mass Feminised is a brilliant choice for collectors who love classic feminised cannabis seeds with heavyweight structure, loud flavour and proper old-school-meets-modern hybrid appeal.

Genetics & Growth Traits

Monster Mass Feminised combines Select Critical Mass x Select Critical+ genetics, creating a robust Indica/Sativa hybrid with fast flowering, strong resilience and big production potential. The Critical Mass side brings density, yield and that chunky flower formation the line is known for, while the Critical+ influence adds extra fruit sweetness, skunky punch and rapid performance.

This feminised variety is listed with an indoor flowering time of around 45–50 days and an outdoor harvest window of mid to late September. Yields are stated at approximately 700–800g/m² indoors and around 900g+ per plant outdoors, giving Monster Mass Feminised serious heavyweight appeal.

Expect large, pale-green buds with a golden shimmer, fiery red hairs and a sticky finish that stays resinous even after curing. The product page also notes that it responds well indoors to early FIMing, multiple-plant SOG setups and gentle LST, helping encourage lower growth and multiple cola development.

Aroma and Flavour

Monster Mass Feminised has a huge, unmistakable aroma built around fragrant fruit and pungent skunk. The scent is overpowering, sweet and deeply funky, with a fruity phenotype showing distinct blackberry-style sweetness.

The flavour is intense, sweet and full-bodied. Expect bright fruit and citrus on the inhale, followed by kush, blackberries and cola cube sweetness. On the exhale, stronger skunk and hash notes come through, leaving a lingering exotic fruit finish that feels bold, sticky and properly memorable.

Effects

Monster Mass Feminised is described as sedative, long-lasting and deeply relaxing across both body and mind. The effect can last around 2.5 to 3.5 hours, bringing full-body calm, muscle relaxation, appetite stimulation and classic couch-lock potential.

This is very much a wind-down style strain, with a soothing and heavy character that suits relaxed evenings and slow-paced downtime. The product page notes that one rare phenotype tested above 22% THC, so the overall profile is best treated as a strong, body-led hybrid with plenty of relaxing weight.

What You'll Love

Monster Mass Feminised delivers fast flowering, huge yield potential and loud fruity-skunk flavour in true Critical Mass Collective style. The fruit, pungent skunk, citrus, kush, blackberry, cola cube and hash notes give it a rich, layered terpene profile, while the large sticky buds and golden shimmer bring serious visual appeal.

You’ll love its Select Critical Mass x Select Critical+ genetics, 18–20% THC profile, rapid 45–50 day flowering time and powerful sedative effects. For fans of Critical Mass Collective seeds, high-yielding feminised cannabis seeds, fruity skunk hybrids and classic relaxing strains with serious production power, Monster Mass Feminised is a proper heavyweight icon.