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Grandaddy Black
Feminized
Grandaddy Black delivers a compact, indica-forward plant that produces dense, resinous buds. Expect 8 to 9 weeks of flowering with yields around 450 to 550 g/m2 indoors. The profile combines grape, earth and spice notes with a relaxing, sedative finish. Growers should use moderate training and strict nutrient control to maximize bud density. MasterSeeds offers these feminized seeds for growers in Canada and beyond seeking a reliable, high-THC indica option.
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STRAIN PROFILE
Complete Cannabis Strain Specifications
| Trait | Value |
|---|---|
| Type | Indica-dominant hybrid |
| THC | 18-22% |
| CBD | 0.5-1% |
| Grow Difficulty | Intermediate |
| Flowering Time | 8-9 |
| Yield | High (450-550 g/m2 indoor) |
| Height | Short to medium (60-120 cm) |
| Environment | Indoor / Outdoor |
| Effects | Relaxed, Sedative, Uplifted |
| Flavors | Grape, Earthy, Spice |
| Genetics | Grandaddy x Black |
| Climate | Temperate |
Grandaddy Black Strain Information and Characteristics
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Strain Type:
Grandaddy Black is an indica-dominant hybrid. It leans toward calming effects while keeping a compact structure.
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THC Content:
THC levels sit around 18 to 22 percent for potent daytime and evening use. That strength places Grandaddy Black above many standard recreational strains sold in Canada.
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CBD Content:
CBD remains low at about 0.5 to 1 percent. Patients seeking strong symptom relief often choose this profile for THC-led effects.
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Grow Difficulty:
Grow difficulty rates as intermediate for indoor and outdoor growers. You should plan moderate training and steady nutrient control to reach top yield.
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Flowering Time:
Flowering runs 8 to 9 weeks under stable light cycles. Outdoors, target harvest in late September in temperate regions.
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Expected Yield:
Yields rank high for a compact plant at roughly 450 to 550 grams per square metre indoors. Growers in BC and Ontario report dense, resinous colas under good support.
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Plant Height:
Plants stay short to medium, about 60 to 120 centimetres. This makes the strain suitable for tents and small garden plots.
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Growing Environment:
Grandaddy Black suits both indoor and outdoor setups. It responds well to controlled indoor lighting and finishes reliably outdoors in a warm season.
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Expected Effects:
Expect strong relaxation with a clear mental lift at first. With larger doses the high moves toward sedation, so time sessions accordingly.
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Genetic Lineage:
Genetics read Grandaddy x Black, showing a sturdy indica backbone. The cross favors compact growth and heavy resin production.
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Seed Type:
These seeds are feminized to simplify your grow. Feminized Grandaddy Black reduces the chance of male plants in your crop.
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Preferred Climate:
Best climate is temperate with warm, dry summers. In cooler Canadian regions start early outdoors or use indoor systems to finish on schedule.
Frequently Ask Questions
Everything you need to know about this strain.
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Questions & Answers
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Q: My plants stretch during week two, what should I do?
A: Start low-stress training and lower light distance to reduce stretch while you keep node spacing.
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Q: Leaves yellow late in bloom, is that normal?
A: A decline in nitrogen is normal late bloom; flush only if brown tips and nutrient lock appear.
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Q: How do I increase resin production?
A: Lower night temperatures by about five degrees in the final two weeks and add a PK booster to the feed.
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Q: Should I do heavy defoliation?
A: Use selective defoliation to improve airflow and remove large fan leaves that block bud sites.
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Q: What if outdoor weather turns wet late season?
A: Keep canopy open and harvest early if rain persists to avoid bud rot.
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