The shortest version: Royal Queen Seeds's take on hybrid genetics, 6-10% THC, 9-10 weeks flowering, moderate grow.

The lab panel on this one tells the real story: CBD sits between 8–15%, often meeting or outpacing the 6–10% THC, which puts the ratio squarely in therapeutic territory rather than recreational-first. That balance comes from crossing Critical Mass with a CBD-dominant parent, and the Critical Mass side pulls its weight on yield — growers are regularly hitting 500–550 g/m² indoors after a 9–10 week flower cycle. The structure stays compact enough for a tent without much intervention, and the fruity, earthy aroma keeps the grow room from smelling like a dispensary floor. It handles both indoor and outdoor environments, though Canadian outdoor growers should plan around a mid-October finish before the first hard frost rolls in.

Best suited to home growers who want a moderate-difficulty plant they can actually use medicinally, without chasing high-THC numbers.

Genetics & Lineage

Medical Mass traces its genetics to Critical Mass x CBD dominant plant. This hybrid-dominant feminized seed produces plants that express the best traits of its parent lineage, delivering consistent results for growers of all experience levels. Bred by Royal Queen Seeds, 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 10%, this provides a mild, approachable experience great for beginners or those seeking gentle relief.

THC Level & Potency

Medical Mass delivers THC levels of 6-10%, placing it in the milder range, making it approachable for newer users or those seeking functional effects. With CBD levels reaching 8-15%, this strain offers a more balanced cannabinoid profile that may temper the intensity of the THC. The onset typically arrives within minutes with a balanced head-and-body experience that evolves over time.

Growing Medical Mass

Medical Mass 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 9-10 weeks with yields of 500-550g/m². Plants typically reach 60-100cm 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

Medical Mass features a fruity, sweet, earthy terpene profile that develops complexity throughout the flowering cycle. Sweet berry and grape notes dominate the inhale, with a sugary exhale that lingers on the palate. 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, Medical Mass 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 Medical Mass?

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 Medical Mass from Seennabis?

When you purchase Medical Mass through Seennabis, you are buying directly from Royal Queen Seeds — One of Europe's largest and most trusted seed banks, founded in Amsterdam in 2008. Every order includes verified genetics, discreet shipping, and responsive seller support. Royal Queen Seeds has completed over 257 sales.