MK-91 by Pisces Genetics
Master Kush × Chem '91
MK-91 by Pisces Genetics is a predominantly indica cultivar recognized for its classic potency and resin production. It is known for delivering a sedating, body-centric effect, making it a popular choice for evening consumption.
Appearance
MK-91 typically develops into a compact and sturdy plant, characterized by broad, dark green leaflets and a prominent central cola. Its flowers are dense, often forming in shapes ranging from golf balls to torpedoes, with a high calyx-to-leaf ratio that simplifies trimming. Mature pistils can display colors from tangerine to deep rust, and the buds are covered in abundant, bulbous trichomes that mature from clear to milky and eventually amber.
While generally green, cooler temperatures can sometimes induce subtle plum-like tints in the sugar leaves. The finished product is noted for its sticky, granular resin coating tight, heavy nuggets.
Aroma & Flavor
The aroma of MK-91 is often described as a blend of earthy kush notes with a strong chem fuel undertone, complemented by hints of pepper, citrus rind, and faint incense. The initial impression is typically dominated by a penetrating, solvent-like sharpness, characteristic of Chem '91 influence. Deeper aromas include loamy soil and a sweet, hashy warmth.
On the palate, MK-91 presents immediate fuel and earth flavors, with a sour edge. Inhalation can reveal notes of lemon peel and cracked pepper over a musky base, while exhalation deepens into incense, wet stone, and a lingering hash finish.
Effects
MK-91 is recognized for its heavy-hitting, sedating, and body-centric effects. This indica-dominant cultivar is often associated with a relaxing experience that appeals to consumers seeking to unwind. Its potency suggests it is best suited for use in the evening or when a strong sense of calm is desired.
Terpenes & Cannabinoids
MK-91 typically exhibits a THC content ranging from 18% to 26%, with CBD levels below 1%. The terpene profile is believed to be anchored by myrcene, beta-caryophyllene, and limonene, contributing to its characteristic aroma and effects. Secondary terpenes like humulene and pinene may add woody and pine nuances, while linalool might contribute faint floral or lavender notes in certain phenotypes.
Origins & Lineage
While Pisces Genetics has not officially disclosed the exact parentage of MK-91, the name and observed traits strongly suggest a lineage influenced by Master Kush and Chem '91. Master Kush is known for its Afghani and Hindu Kush roots, contributing to dense resin and earthy-spicy notes. Chem '91, a Skunk VA cut, is recognized for its distinct petroleum-like and sour aromatics.
This inferred pairing aligns with MK-91's predominantly indica growth characteristics, compact structure, and its potent, fuel-forward sensory profile. The cultivar is seen as a tribute to classic, old-school genetics, emphasizing authenticity in aroma and effect.
Growing
MK-91 is described as having a compact plant structure with short internodal spacing, typically between 3–5 cm indoors. It is known for fast finishing times and dense flower development, with a high calyx-to-leaf ratio. The cultivar is considered grower-friendly, maturing within a commercially viable window.
It produces stout, trichome-heavy plants that yield dense buds. While specific yield data is not provided, its morphology suggests a focus on quality and resin production. The plants are well-suited for indoor cultivation, where controlled conditions can optimize their structure and flowering.