Quick read: 20-26% THC, 100-180cm mature height, 10-14 weeks bloom. Genetics: Silver Haze (Sensi Seeds genetics). Difficulty: moderate.

Lineage: rooted in Sensi Seeds' original Haze work, Silver Haze carries the sativa backbone that Dutch breeders spent decades refining. THC tests typically land between 20–26%, so this is not a strain to underestimate on a weeknight — the head effect comes on fast and runs long. Flowering stretches 10–14 weeks, which is the honest cost of growing something with this much Haze in its DNA. Indoors under a well-dialled light setup, expect 400–550 g/m² from plants that stretch hard in the first few weeks of flower; topping or LST early keeps canopy height manageable. The dried flower smells like walking through a pine stand after rain, with a sweet, earthy finish on the exhale. Both indoor and outdoor grows are workable, though outdoor plants in shorter Canadian seasons need a warm southern exposure and an early start to finish before the cold sets in.

Best suited to experienced sativa growers who have the vertical space and the patience for a longer flower window.

Genetics & Lineage

Silver Haze traces its genetics to Silver Haze (Sensi 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 Sensi Seeds, each seed is selected for genetic stability, terpene expression, and vigor.

Effects & Experience

Users report primarily energetic and euphoric 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 26%, this is a potent strain recommended for experienced users — newcomers should start low and go slow.

THC Level & Potency

Silver Haze delivers THC levels of 20-26%, placing it in the high-potency category alongside powerhouses like Gorilla Glue and Girl Scout Cookies. 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 Silver Haze

Silver Haze 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 10-14 weeks with yields of 400-550g/m². Plants typically reach 100-180cm 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

Silver Haze features a sweet, earthy, pine, floral 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, Silver Haze 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 Silver Haze?

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 Silver Haze from Seennabis?

When you purchase Silver Haze through Seennabis, you are buying directly from Sensi Seeds — The world's oldest cannabis seed bank, founded in Amsterdam in 1985. Every order includes verified genetics, discreet shipping, and responsive seller support. Sensi Seeds has completed over 177 sales.