Coastal Genetics brings sun-grown resilience to the autoflower seeds market with Critical Mass, a fast-finishing hybrid engineered for mold-resistant cultivation and heavy yields up to 600g/m². This cross combines the best traits of cookie/cake/runtz lineages, delivering full-spectrum terpenes with earthy and sweet notes that evolve through a 6-7 week flowering window. Effects lean euphoric and relaxed, settling into sleepy comfort—ideal for evening use. Plants reach 100-160cm with moderate growing difficulty, making them accessible to intermediate cultivators seeking reliable production without complexity. Explore more from the Coastal Genetics catalog or compare with Purple Kush for alternative coastal-bred genetics built on the same sun-grown foundation.

Genetics & Lineage

Critical Mass Auto traces its genetics to 70% Indica / 30% Sativa (Coastal Genetics). This hybrid-dominant autoflower seed produces plants that express the best traits of its parent lineage, delivering consistent results for growers of all experience levels. Bred by Coastal Genetics, each seed is selected for genetic stability, terpene expression, and vigor.

Effects & Experience

Users report primarily relaxed and euphoric effects, making this strain ideal for evening use and unwinding after a long day. The body-centered stone builds gradually, easing tension and promoting deep physical relaxation. With THC levels reaching 22%, this offers a well-balanced experience suitable for most users with some cannabis familiarity.

THC Level & Potency

Critical Mass Auto delivers THC levels of 22%, placing it in the moderate-to-strong range that most regular consumers find comfortable. CBD content is minimal, so the psychoactive effects are front and center. The onset typically arrives within minutes with a balanced head-and-body experience that evolves over time.

Growing Critical Mass Auto

Critical Mass Auto is rated as moderate difficulty, making it suitable for growers with some experience. Basic knowledge of nutrient schedules, pH management, and environmental controls will help maximize results.

Indoor Growing: Expect a flowering time of 6-7 weeks with yields of 600g/m2. Plants typically reach 100-160cm indoors. This strain responds exceptionally well to SCROG (Screen of Green) and LST (Low Stress Training), which can boost yields significantly. Maintain temperatures between 68-80°F with relative humidity around 45-55% during flowering.

Outdoor Growing: This versatile strain performs well in both indoor and outdoor environments. Outdoor growers in warm climates can expect harvest from late September through October. Watch for humidity during late flowering to prevent bud rot, especially with the dense, heavy buds this strain produces.

Flavor, Aroma & Terpene Profile

Critical Mass Auto features a earthy, sweet terpene profile that develops complexity throughout the flowering cycle. A smooth, candy-like sweetness defines the flavor, with subtle complexity on the exhale. The aroma intensifies significantly during the final 2-3 weeks of flowering — carbon filtration is recommended for indoor grows requiring discretion.

Medical Benefits

While individual experiences vary, Critical Mass Auto is commonly reported to help with stress relief, chronic pain, insomnia, and muscle tension. The deeply relaxing effects make it a popular choice among medical users seeking nighttime relief. As with any cannabis strain, start with a low dose and increase gradually. Consult a healthcare professional before using cannabis for medical purposes.

Who Should Grow Critical Mass Auto?

This strain is ideal for intermediate growers ready to push their skills and be rewarded with superior results. If you're looking for evening relaxation and deep stress relief, this is your strain.

Why Buy Critical Mass Auto from Seennabis?

When you purchase Critical Mass Auto through Seennabis, you are buying directly from Coastal Genetics — California coastal craft breeder. Every order includes verified genetics, discreet shipping, and responsive seller support. Coastal Genetics has completed over 37,750 sales with a 4.7-star rating from 2,832 verified reviews.