The Leaf Index
Vol. IA field guide to cannabis cultivarsleafly.cc
No. 0198Sativa

Amnesia Fast by Advanced Seeds

Amnesia × Amnesia Haze

Amnesia Fast by Advanced Seeds is a sativa-dominant photoperiod strain developed to shorten the famously long flowering period of traditional Amnesia and Amnesia Haze. It aims to deliver the characteristic cerebral and citrus-forward profile in a more grower-friendly timeframe. This variety emerged as part of a trend towards faster-finishing photoperiods without sacrificing potency.

May help withPain
AromaCitrusGrapefruitHerbalFloralIncenseCandyGrape

Appearance

Amnesia Fast exhibits a sativa-leaning structure with an upright growth habit, moderate internodal spacing, and elongated, spear-shaped colas. Its leaves are typically narrow with serrated edges. As the flowers mature, pistils change from cream to orange and then amber, while trichome coverage becomes abundant, giving the buds a frosted appearance. The buds are generally long and less dense than indica-dominant varieties, which aids in airflow.

Plants commonly reach 80-140 cm indoors with training and can grow to 180-250 cm outdoors. A predictable stretch of 1.5-2.0x during the early bloom phase is expected. The calyx-to-leaf ratio is considered above average, potentially simplifying the trimming process.

Aroma & Flavor

The aroma of Amnesia Fast is characterized by bright citrus zest, with prominent notes of lemon and sweet orange, complemented by hints of lime pith and grapefruit. Underlying this are mid-tones of cedar, fresh herbs, and a subtle floral sweetness, sometimes described as chamomile-like. Some phenotypes may also present a faint metallic or earthy spice. Upon curing, the sharper citrus notes can meld into impressions of sweet-tart candy.

The flavor profile mirrors the aroma, featuring a dominant citrus character that is both zesty and sweet. The herbal and floral undertones contribute complexity, creating a layered sensory experience. The overall bouquet is often described as a clean, heady haze perfume with a modern, fruit-forward polish.

Effects

Amnesia Fast is known for providing energetic and cerebral effects, consistent with its sativa dominance. Users often report a clear-headed, high-octane lift that can enhance focus. Despite its stimulating qualities, the strain is also associated with calming properties, contributing to a balanced experience.

The combination of energetic and calming effects makes it suitable for various situations. Its uplifting nature can be beneficial for mood enhancement, while the cerebral clarity may support productivity.

Terpenes & Cannabinoids

The cannabinoid profile of Amnesia Fast typically includes THC levels ranging from 18% to 22%, with CBD content below 1%. The terpene profile is believed to contribute significantly to its distinctive aroma and effects. Key terpenes often present include terpinolene, which provides sweet, fresh, and piney-citrus notes; limonene, contributing zesty lemon-orange facets; and myrcene, offering herbaceous warmth.

Additional terpenes like beta-caryophyllene and ocimene may also be present, adding subtle spicy and floral undertones. This terpene combination is responsible for the quintessential haze aroma with a fruity polish, and likely influences the strain's energetic and uplifting effects.

Growing

Amnesia Fast is a fast-flowering photoperiod strain, significantly reducing the bloom time compared to its traditional Haze ancestors. Indoor flowering typically takes approximately 6-8 weeks, a reduction of about 10-30% from classic Amnesia Haze. This accelerated cycle is advantageous for cultivators, especially in temperate climates, as it lowers the risk of issues like mold and pests late in the season.

The plant's sativa-dominant morphology, including its upright stance and moderate internodal spacing, makes it suitable for various training techniques like SCROG. Its above-average calyx-to-leaf ratio can simplify trimming. The strain is generally considered to have reliable vigor and a predictable stretch during flowering.

Origins & Lineage

Amnesia Fast was developed by Advanced Seeds in Spain as a response to the extended flowering times associated with classic Amnesia and Amnesia Haze strains. The goal was to create a photoperiod variant that retained the desirable cerebral and citrus-forward characteristics of the original while significantly shortening the bloom period.

This was achieved by incorporating genetics from an early-flowering donor into a photoperiod line, then stabilizing the strain to maintain photoperiod flowering behavior and reduce the flowering time without inducing autoflowering traits. The resulting cultivar is feminized and predominantly sativa, expressing approximately 70-80% sativa traits in its morphology and effects.

Frequently asked questions

What makes Amnesia Fast different from Amnesia Haze?
Amnesia Fast is a photoperiod strain developed to have a significantly shorter flowering time, typically 6-8 weeks, compared to the 10-12 weeks often required for Amnesia Haze, while aiming to preserve its characteristic effects and aroma.
Is Amnesia Fast an autoflower?
No, Amnesia Fast is a photoperiod strain. It has been bred to flower faster than traditional Haze varieties but still requires a change in light cycle to initiate and maintain flowering.
What kind of effects can I expect from Amnesia Fast?
Users often experience energetic and cerebral effects, promoting focus and a clear-headed high, alongside reported calming properties.
What are the dominant aromas and flavors of Amnesia Fast?
The strain is known for its prominent citrus notes, such as lemon and orange, complemented by herbal, floral, and sometimes candy-like undertones.