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Cannatonic

hybrid

Also known as: Canna Tonic, MK Ultra x G13 Haze, Cannatonic CBD

THC3–9%
CBD6–17%
OriginSpain

Cannatonic is a pioneering high-CBD hybrid from Resin Seeds, created by crossing MK Ultra with G13 Haze. As the parent strain of ACDC and numerous other CBD varieties, it holds a foundational place in medical cannabis genetics, offering balanced THC and CBD levels ideal for therapeutic use.

Overview

Cannatonic is a landmark hybrid strain created by the Spanish seed bank Resin Seeds, widely regarded as one of the foundational breeding parents of the modern high-CBD cannabis movement. By crossing MK Ultra — a potent indica known for its sedative, tranquilizing effects — with G13 Haze — a complex, cerebral sativa hybrid — Resin Seeds produced a strain with an unpredictable but frequently exceptional CBD-to-THC ratio. Depending on the phenotype, Cannatonic plants can express CBD concentrations ranging from 6% to 17%, while THC remains relatively modest between 3% and 9%, yielding ratios that sometimes approach or exceed 1:1 and occasionally reach 3:1 CBD to THC. This genetic variability means seed-grown Cannatonic crops benefit from early cannabinoid testing to select the highest CBD phenotypes, though clones of proven high-CBD plants provide greater consistency. Cannatonic's influence extends far beyond its direct cultivation: it is the parent strain of ACDC, Harle-Tsu, and several other celebrated high-CBD varieties, cementing its legacy as one of the most important cultivars in medical cannabis history. The strain produces compact to medium-height plants with dense, resinous buds displaying earthy green coloration and a generous trichome coating. Its aroma is multifaceted — an earthy, piney base with citrus overtones and subtle herbal notes — derived from a terpene profile rich in myrcene, caryophyllene, and limonene. Medically, Cannatonic is prized for its ability to address muscle spasms, chronic pain, migraines, anxiety, and mood disorders. The moderate THC content works synergistically with CBD to produce a mildly pleasant, clear-headed experience that rarely produces anxiety or paranoia. Growers appreciate Cannatonic for its relatively compact structure and robust resistance to common molds and pests, though outdoor cultivation in humid climates requires vigilant monitoring during late flowering.

Effects

Positive Effects

Relaxed●●●●Happy●●●○○Calm●●●●

Medical Benefits

Pain Relief●●●●Muscle Spasm Relief●●●●●Anxiety Relief●●●●

Side Effects

Dry Mouth●●○○○

Genetics

mother

MK Ultra

father

G13 Haze

Growing Info

Difficulty

moderate

Flowering Time

63 days

Yield (Indoor)

350-500g/m²

Yield (Outdoor)

400-600g/plant

Height (Indoor)

80-120cm

Height (Outdoor)

120-160cm

Flavors

earthycitruspineherbalsweet

Aromas

earthypinecitrusherbalwoody

Colors

greenlight greenorange
Cannatonic Strain | The Strain Report