Holy Grail Kush
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Holy Grail Kush

also known as Holy Grail, Holy Grail OG

Indica-dominantTHC-dominant
Indica 60 %Sativa 40 %

Holy Grail Kush is a cross of Kosher Kush and OG #18 from DNA Genetics that won the hybrid category at the 2011 High Times Cannabis Cup.

Research as of 11/05/2026

For Holy Grail Kush, there is a clear gap between the breeder's figure and declared product values: DNA Genetics gives around 20 % THC, while a Canadian batch packaged in 2023 carried 27.3 % THC on its label. The cross of Kosher Kush and OG #18 won the hybrid category at the 2011 High Times Cannabis Cup, with full marks according to DNA Genetics.

THC and CBD Content:

Other strain descriptions also arrive at 20 % THC, and one adds 1 % CBG. A batch from Illinois was listed in 2021 with 24.43 % THCA and 27.72 % total cannabinoids; neither this listing nor the Canadian product information states which laboratory did the measuring in each case. A further single measurement without laboratory or year gave 20.3 % THC and 0.03 % CBD. The values apply only to the respective batch and vary with cultivation and phenotype.

Aroma and Flavor:

Limonene, myrcene and caryophyllene are considered the main terpenes, though in varying order. Other strain descriptions put limonene first, the Canadian producer caryophyllene, at 0.99 % total terpenes in its batch. DNA Genetics adds alpha-pinene and linalool.

In flavor, the breeder lists lime and lemon, with pine, wood and warm spice beneath, plus coffee, mint and tea; for aroma, the breeder emphasizes pine and citrus with earthy notes of grass and cardamom. Coffee, mint and tea also appear in other descriptions. Another describes diesel, lime and bubble gum in the smell and an earthy taste with hashish notes. A test report on the Illinois batch found cedar wood, mint and cinnamon.

Genetics and Origin:

As parent strains, DNA Genetics names Kosher Kush and OG #18; other descriptions list the father as OG Kush #18. One strain description attributes both parents to Reserva Privada. The breeder puts the indica share at 60 %. A 2nd place in the Indoor Hydro category at the Spannabis Champions Cup is also reported for 2012, though in only one source. Holy Grail and Holy Grail OG are common name variants.

For HG23, DNA Genetics crossed the strain again with Kosher Kush. Blasphemy by Treeology Genetics, Holy Cherry Gelato by Equilibrium Genetics and Holy Communion by The Bakery Genetics also have it as a parent; without a breeder given, Zero Gravity and Lamborghini are listed as offspring.

Effects:

Consumers consistently describe the effect as relaxing and euphoric. How strongly it takes hold of the body is perceived differently: some report a heavy, long-lasting effect extending to reluctance to move and tiredness, others a light body feel with a clear head. Creativity, concentration or drive are mentioned in isolated cases. Reported side effects are dry mouth, dry eyes and dizziness, and in individual cases paranoia and underlying nervousness.

Cultivation:

DNA Genetics offered the strain as feminized seed. Two breeder statements exist on flowering time: the original description gives 9 weeks, the current strain page 8 to 10 weeks. The original description puts indoor yield at 500 to 650 g/m², the strain page at 17 to 23 ounces per square meter; outdoors, DNA Genetics gives about 28 ounces per plant.

According to the breeder, the plant is nutrient-hungry and, with experienced growers, tolerates feeding up to the limit. The breeder recommends a warm, dry climate. Because the buds become heavy and dense, the breeder and a cultivation guide advise 40 to 50 % relative humidity against mold; the shoots need supports. The strong flowering odor calls for good ventilation, for which the guide names activated carbon filters. The guide rates the difficulty as moderate, whereas the original breeder description also considers the strain suitable for beginners.

Community Experiences:

The indoor grows covered in the reports reviewed lasted 63 to 80 days in flower. Reports on stretch differ widely: one plant grew from about 100 to 150 cm after the switch, another from 25 to 100 cm. The range of growth forms is correspondingly broad, from fir-shaped or bushy plants with an indica-like habit to tall, fast-growing specimens with sativa-like growth. Numerous strong side branches are described repeatedly.

Several growers call the dried buds rock-hard and very compact, two others slightly below average. All growers who report on the ratio of flower to leaf mass rate it as very good. The plants tolerated topping of the main shoot well; two growers consider them suitable for SCROG and supported them in flower with nets or stakes. Reports on fungus susceptibility contradict each other: twice the strain was spared, once it proved susceptible. Yield assessments range from slightly below average to very high. In one case both seedlings stunted and the grow was abandoned.

This article is for informational purposes only and is not a substitute for medical or therapeutic advice. If you have any health-related questions, please consult a doctor or another qualified professional.

Effects & aroma

From reviews and experience reports — subjective, not a medical statement

Reported as positive
sleepy
focused
energetic
Reported side effects
dizzy
anxious
paranoid
Aroma & flavor
Mint Tea Herbs

No reviews yet — information from the strain description. Rate the strain to see shares.

Cannabinoids & terpenes

Levels vary by batch, phenotype and cultivation — values are indicative

THC
20.3–27.3 % Lab value (3 samples)
20 % Breeder data
20 %additional figure
0 %35 %
Laborwert als Gesamt-THC: THC + 0,877 × THCA (THCA wird beim Erhitzen zu THC)
THCA
24.43 % Lab value (1 sample)
0 %35 %
CBD
0.03 % Lab value (1 sample)
0 %20 %
CBG
1 %
0 %10 %
Terpene profile
  • #1
    LimoneneCitrus
  • #2
    MyrceneHerbs
  • #3
    CaryophyllenePepper
  • #4
    PinenePine
    Breeder data
  • #5
    LinaloolFlowers
    Breeder data

Cultivation

Indicative values from breeder data and grow reports — varies by phenotype and setup

Flowering & harvest
Breeder data
Flowering time
8–10 weeks
Yield & height
Breeder data
Yield indoor
500–650 g/m²
Stretch after flip
1.5–4 ×

From grow reports: about 100 to 150 cm (factor 1.5) and 25 to 100 cm (factor 4, https://seedfinder.eu/en/strain-info/holy-grail-kush/dna-genetics-seeds/review/83596626258099822).

Difficulty, environment & climate
Breeder data
Difficulty
Medium
Indoor
suitable
Outdoor
suitable
Climate
Warm, Dry

DNA Genetics recommends a warm, dry climate and 40–50 % relative humidity; the cultivation guide on leafly.com gives the same humidity.

Morphology
Bud structure
Dense
Calyx-to-leaf ratio
High

Growth form inconsistent across grow reports: fir-shaped and sturdy, bushy or indica-like, but also tall and fast-growing with sativa-like growth; repeatedly numerous strong side branches. Dried buds rock-hard and very compact in 5 reports, slightly below average in 2 reports. Flower-to-leaf ratio very good in all reports that state it. Dense, heavy buds according to the breeder and the cultivation guide.

Training
Topping
Recommended
ScrOG
Recommended
Support needed
Yes

Topping of the main shoot tolerated well in 3 grow reports; SCROG described as suitable in 2 reports; supports (nets, stakes) necessary in the same reports and according to the breeder. Cultivation guide: top and thin out the plants.

Other
Breeder data
Odor during flowering
High
Nutrient demand
High

Genetics & origin

Origin
Cross
Kosher Kush × OG #18
Type
Indica-dominant
Available as seeds
Feminized
Original breeder
DNA Genetics
Awards
  • Spannabis Champions Cup 2012Indoor Hydro · Place 2
  • High Times Cannabis Cup 2011Best Hybrid · Place 1

Versions by different breeders

Several breeders sell their own versions under this name. Each figure comes from the respective breeder.

DNA GeneticsHoly Grail Kush
Original
Flowering
8–10 weeks
THC
20 %

Values from the current strain page (as of 31 March 2025): 60 % indica, flowering 8–10 weeks, THC around 20 %, indoor yield 17–23 oz/m², outdoor about 28 oz per plant. The original breeder description (reproduced on seedfinder.eu) gives 9 weeks of flowering, 500–650 g/m² and feminized seeds.

Lab results

Measurements of individual samples. Values vary by batch, cultivation and phenotype.

FlowerLab not named
THC20.3 %
THCA–
CBD0.03 %
Limonene 0.02 %Caryophyllene 0.02 %
Flower · 2023nicht angegeben (Produktangabe auf dem Etikett)
THC27.3 %
THCA–
CBD–
Total terpenes0.99 %
Flower · 2021nicht angegeben (Produktangabe)
THC–
THCA24.43 %
CBD–

Community

30 grow and experience reports reviewed Community reports
Consensus

Effect consistently relaxing and euphoric. Grow reports: indoor flowering 63 to 80 days, very good flower-to-leaf ratio, good response to topping the main shoot, numerous strong side branches, repeatedly rock-hard, compact buds.

Divergent reports

Body effect from heavy and long-lasting to reluctance to move and tiredness to light with a clear head; occasionally creative, focused or energizing. Stretch between roughly a factor of 1.5 and 4; growth form indica-like to sativa-like; bud structure slightly below average in two reports; fungus susceptibility contradictory (twice unaffected, once susceptible); yield from slightly below average to very high; one grow abandoned because both seedlings stunted.

Reported values from individual grows
Shortest flowering time in a grow report (indoor)
63 days
Longest flowering time in a grow report (indoor)
80 days
Plant height before and after the flowering stretch in a grow report
100–150 cm
Plant height before and after the flowering stretch in a grow report
25–100 cm

Grow diaries with this strain

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Similar strains

Related genetics, same dominant terpene, similar effects and aroma — excluding direct parents and descendants

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