The Leaf Index
Vol. IA field guide to cannabis cultivarsleafly.cc
No. 7643Hybrid

M-39 Granddaddy by Quebec Cannabis Seeds

M39 × Granddaddy Purple

M 39 Granddaddy is a Canadian hybrid developed by Quebec Cannabis Seeds, combining the resilience of M39 with the flavor profile of Granddaddy Purple. This cultivar aims to balance commercial viability with desirable sensory attributes.

May help withStress
AromaBerryGrapeFloralSkunkEarthyPine

Appearance

M 39 Granddaddy typically produces dense, medium-sized colas with tight calyx structures. Buds are often green, with some phenotypes exhibiting purple hues under cooler temperatures, and are coated in a heavy layer of trichomes. Leaf structure reflects a balanced genetic heritage, and plants generally maintain moderate internodal spacing.

Flowers are often slightly conical, with a good calyx-to-leaf ratio that simplifies trimming. The trichomes mature from clear to amber, signaling harvest readiness. Properly cured buds possess a noticeable sheen due to their resin content, offering strong bag appeal with visual contrast and crystal coverage.

Aroma & Flavor

The aroma of M 39 Granddaddy blends sweet berry and grape notes from its Granddaddy Purple lineage with a cleaner, floral-skunk character inherited from M39. Consumers often detect top notes of grape candy and berry jam, underpinned by earthy spice and hints of pine. The scent intensifies as the plant matures, presenting a complex bouquet that is inviting yet retains classic skunk undertones.

On the palate, the initial impression is of grape soda and mixed berries, followed by earthy spice and herbal notes. The exhale may reveal subtle pine and citrus zest. The aftertaste typically lingers as sweet berry with a dusty, earthy finish. Flavor intensity is influenced by cure quality and harvest timing, with well-cured samples showcasing layered complexity.

Effects

M 39 Granddaddy is reported to deliver a balanced experience, combining cerebral stimulation with physical relaxation. Consumers may find it promotes focus while also inducing a sense of calm. The effects are generally considered moderate, suitable for various consumption times.

Terpenes & Cannabinoids

This strain typically exhibits THC levels ranging from 18% to 24%, with CBD content below 1%. The terpene profile is noted to include myrcene, limonene, caryophyllene, and pinene. These compounds contribute to the strain's complex aroma and flavor, with myrcene and caryophyllene often associated with its grape and earthy notes, while limonene and pinene may add citrus and pine nuances.

Growing

M 39 Granddaddy is generally considered a resilient cultivar, adapted for various growing conditions. Indoor flowering times are typically around 8–9 weeks, and outdoor harvests usually occur by late September to early October in temperate climates. The plant is known for sturdy stems and predictable growth patterns, often benefiting from support later in flower.

The plant's structure supports dense cola formation, and phenotypes leaning towards Granddaddy Purple may develop violet coloration under specific temperature conditions. Yields are considered reliable, aligning with the breeding goal of commercial-scale productivity.

Origins & Lineage

M 39 Granddaddy is a hybrid created by Quebec Cannabis Seeds (QCS), a breeder focused on adapting genetics for northern climates. It is a cross between the Canadian legacy strain M39 and the California classic Granddaddy Purple. The objective was to merge M39's productivity and rapid finishing traits with Granddaddy Purple's resin production, flavor, and bag appeal.

M39 is believed to have roots in Northern Lights #5 and Skunk #1, contributing vigor and fast flowering. Granddaddy Purple, often derived from Purple Urkle and Big Bud, contributes deep colors, dense flowers, and a rich terpene profile. This combination results in a near-balanced hybrid with enhanced sensory characteristics.

Frequently asked questions

What is the THC content of M 39 Granddaddy?
M 39 Granddaddy typically contains between 18% and 24% THC.
What are the dominant flavors and aromas of this strain?
This strain is known for its prominent grape and berry flavors and aromas, often complemented by earthy, floral, and skunk undertones.
What is the genetic background of M 39 Granddaddy?
It is a hybrid cross between the Canadian strain M39 and the California strain Granddaddy Purple.
What are the reported effects of M 39 Granddaddy?
Consumers report effects that are both cerebral and focused, often accompanied by a sense of relaxation.