
- Compact, resinous hybrid built for controlled grows
Grand Master Sexy
Grand Master Sexy compact hybrid suited for controlled greenhouse or indoor grows with a balanced, resinous profile.
- Compact growth ideal for limited spaces
- Resin-rich buds with consistent potency
- Performs well under careful humidity control
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18-24% |
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0.5-1% |
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Master Kush x Granddaddy Purple |
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Hybrid |
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Intermediate |
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8-10 weeks |
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Short to medium, 60-120 cm |
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Medium to high (approx 400-550 g/m² indoors) |
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Earthy, Citrus zest, Pine |
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Feminised |
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humid greenhouse environments |
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Relaxed, Euphoric, Focused |
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Indoor and greenhouse; suitable for controlled outdoor in mild climates |
About Grand Master Sexy
Grand Master Sexy is a compact, resin-heavy hybrid bred for manageable indoor and greenhouse cultivation. It performs well in controlled environments, offering a reliable flowering time and a mix of cerebral lift and body relaxation while requiring attentive humidity and airflow management.
Grand Master Sexy is a balanced hybrid with a slight indica leaning. It produces dense, resinous buds suited to controlled grows.
THC levels usually sit between 18% and 24%, providing a noticeable psychoactive effect. The potency is consistent across well-grown phenotypes.
CBD content is low, typically under 1%. This keeps the profile focused on cerebral and body effects rather than CBD-driven therapeutics.
Grand Master Sexy comes from a Master Kush x Granddaddy Purple cross. The lineage contributes to strong resin production and compact growth habits.
Seeds are supplied as Feminised to simplify cultivation and ensure flowering females. Phenotype variation is modest but observable between plants.
Growing Grand Master Sexy in humid greenhouse environments demands intermediate skills to manage mould and humidity. Good airflow, regular defoliation and preventive care reduce risk and improve bud quality.
Flowering time averages 8 to 10 weeks under optimal conditions. Some phenotypes may finish slightly earlier or later depending on feeding and light schedules.
Yield is medium to high when plants receive appropriate support and nutrients. Expect around 400–550 g/m² indoors with training and correct feeding.
Plants remain compact to medium height with a dense central cola structure. Indoor heights typically range from 60 to 120 cm with limited stretch.
Indoors, Grand Master Sexy responds well to SCROG and SOG setups and benefits from controlled lighting and ventilation. Outdoors in Cornwall it performs best in a sheltered greenhouse or a warm, protected spot to avoid wind and rain.
In Cornwall, humid greenhouse environments increase the risk of mould and bud rot without strict humidity control. Maintain 40–50% relative humidity during flowering and use dehumidification and good ventilation to protect trichomes.
Initial effects deliver a clear cerebral lift that relaxes into a steady body calm. Lower doses can aid focus while higher doses increase sedation.
The flavour profile mixes earthy base notes with bright citrus zest and a hint of pine. Smoke is relatively smooth with a slightly sweet finish.
Frequently Asked Questions
Common questions about this strain, covering growth, effects, and suitability for UK conditions.
Yes, its compact stature and controlled stretch make it a good candidate for small indoor cannabis grow spaces when trained and kept under 1.2 m.
Use dehumidifiers, increase airflow with oscillating fans and avoid overwatering to keep humidity in the recommended 40–50% range during flowering.
Low-stress training and SCROG are effective to open the canopy and improve light penetration while keeping height manageable.
Harvest when trichomes show a mix of cloudy and amber for balanced effects, typically at the end of the 8–10 week flowering window.
A balanced N-P-K feed during veg then reduced nitrogen with higher phosphorus and potassium in flower supports bud development.
In humid conditions it is susceptible to mould and bud rot, so monitor regularly and use integrated pest management and preventive hygiene.
Outdoors it needs a sheltered, sunny spot or a greenhouse in the UK to avoid excess rain and wind during the late season.
Dry slowly over 7–10 days at 18–21°C and 50% RH, then cure in jars for at least two weeks for improved flavour and smoothness.
Moderate pruning and defoliation help airflow and light distribution, but avoid over-pruning which can stress plants and slow growth.
Cultivation remains illegal without licence in the UK, so check current laws and obtain appropriate permissions before growing.
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