Quick read: 18-22% THC, 130-220cm mature height, 10-13 weeks bloom. Genetics: Damnesia (Green House Seeds genetics). Difficulty: moderate.

Lineage: AMS × Amnesia Haze, bred under the Green House Seeds program, gives Damnesia a sativa-dominant profile that leans heavily on the Amnesia side — long internodes, a stretched canopy, and a flowering window that runs 10 to 13 weeks depending on how hard you push light. That's a commitment, but the payoff is a solid 400–550 g/m² from feminized seeds that finish reliably indoors or out. THC lands between 18–22%, which puts it in a functional upper-mid range — present without being overwhelming. The flavour profile is straightforward: earthy base with a mild sweetness on the exhale, nothing showy. Growers who've run long-flowering sativas before will find the moderate difficulty rating accurate; she needs space, some LST early on, and patience through those extra weeks. Outdoors in British Columbia or Ontario, time your transplant carefully — a 13-week flower needs a frost-free window into late October.

Best suited to experienced-intermediate growers who have the vertical space and season length to let a true sativa finish properly.

Genetics & Lineage

Damnesia traces its genetics to Damnesia (Green House Seeds genetics). This sativa-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 Greenhouse Seeds, each seed is selected for genetic stability, terpene expression, and vigor.

Effects & Experience

Users report primarily energetic and creative effects, making this strain perfect for daytime use, creative projects, and staying productive. The cerebral lift arrives quickly, sharpening focus and inspiring motivation. With THC levels reaching 22%, this offers a well-balanced experience suitable for most users with some cannabis familiarity.

THC Level & Potency

Damnesia delivers THC levels of 18-22%, 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, starting as a cerebral buzz that gradually expands.

Growing Damnesia

Damnesia 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 10-13 weeks with yields of 400-550g/m2. Plants typically reach 130-220cm indoors. Standard training techniques like topping and LST will help manage height and improve light penetration. 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 dense flower formations.

Flavor, Aroma & Terpene Profile

Damnesia 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, Damnesia is commonly reported to help with depression, fatigue, lack of motivation, and ADHD symptoms. The uplifting, focusing effects make it popular among medical users seeking daytime functionality. 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 Damnesia?

This strain is ideal for intermediate growers ready to push their skills and be rewarded with superior results. If you need a daytime boost for creativity and sustained focus, look no further.

Why Buy Damnesia from Seennabis?

When you purchase Damnesia through Seennabis, you are buying directly from Greenhouse Seeds — Renowned Strain Hunters founded by Arjan Roskam, 'The King of Cannabis'. Every order includes verified genetics, discreet shipping, and responsive seller support. Greenhouse Seeds has completed over 92 sales.