Arjan's Ultra Haze #1

Cannabis Strain by Green House Seeds

Introduction
Arjan's Ultra Haze #1 from Green House Seeds is the extreme end of sativa cultivation—a pure sativa with an approximately 91-day indoor flowering period that demands total commitment from the grower. It is the first entry in Green House's Ultra Haze series, the collection that marks the furthest point on the breeder's Haze continuum where uncompromised sativa genetics and real-world feasibility meet.

Lineage
For Green House Seeds and Arjan Roskam, the Ultra Haze series represented a deliberate choice to release genetics that prioritize authentic sativa expression over commercial viability. The numbered Haze series (Haze #1, #2, #3) already pushed sativa boundaries; the Ultra series removed the remaining concessions to indoor practicality. Arjan's Ultra Haze #1 is bred from the same lineage of Haze genetics that the Amsterdam company has been working with since the late 1980s—Southeast Asian and Central American sativa landraces combined with original Haze material, selected specifically for their most complete expression rather than their speed.

Terpenes
At 91 days of indoor flowering, the terpene development in Ultra Haze #1 reaches its most complete form. Terpinolene, characteristically the dominant Haze terpene, develops a depth and complexity that requires full maturation to achieve. Secondary ocimene, linalool, and increasingly complex floral-citrus compounds layer over the piney terpinolene base during the final weeks of flowering. The aromatic profile of a properly finished Ultra Haze #1 is exceptional—one of the most complex in the Green House catalog.

Growth
Growing Ultra Haze #1 is a major undertaking. Significant vertical development, extended flowering time, and specialized training requirements make this unsuitable for beginning growers. Outdoor cultivation in long-season climates—Thailand, Hawaii, Spain, Southern California—can produce remarkable plants. Indoor yields are modest for the investment.

Effects
Effect reports universally describe an intense, extended, profoundly cerebral sativa experience: clear, energizing, creative, and long-lasting. Not for those seeking relaxation.

⚠️ This information is for educational purposes only and should not be considered medical advice.

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