
- Citrus clarity with classic haze energy
Grapefruit Haze
Grapefruit Haze is a sativa-dominant hybrid known for bright citrus flavour and uplifting effects, suited to growers who can manage stretch and humidity.
- Bright grapefruit flavour with a focused uplift
- Performs well under controlled indoor conditions
- Rewards training and good airflow with high-quality buds
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18-22% |
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≤0.5% |
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Grapefruit x Haze |
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Sativa-dominant hybrid |
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Intermediate |
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9-11 weeks |
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Medium-tall indoors; tall outdoors (up to 2 m) |
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Medium to high (400–500 g/m² indoor) |
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Grapefruit, Citrus haze, Sweet pine |
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Feminised |
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Cool northern summers |
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Uplifting, Energetic, Focused |
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Both |
About Grapefruit Haze
Grapefruit Haze combines grapefruit-forward terpenes with classic haze lift to produce a clean, energetic high. The plant favors a controlled environment and rewards training and good airflow with solid yields and pronounced citrus aroma.
Grapefruit Haze is a sativa-dominant hybrid with lively, cerebral characteristics. The plant leans towards energetic, day-time effects rather than heavy sedation.
THC levels typically sit between 18 and 22 percent, offering a clear, potent hit for experienced users. The potency is consistent but can vary with feeding and light intensity.
CBD is low, usually under 0.5 percent, so it is not chosen for high-CBD therapeutic needs. The low CBD helps preserve the classic haze uplift without heavy body relief.
Grapefruit Haze descends from Grapefruit crossed with classic Haze genetics. The combination brings citrus terpene dominance and sativa-like lift.
Seeds are typically sold as feminised to ensure virtually all plants produce usable flower. Growers favour feminised seeds for space-limited indoor grows and predictable outcomes.
Growing Grapefruit Haze in cool northern summers requires attention to airflow and light intensity to avoid stretch and mould. Expect intermediate difficulty and plan for protection from cool, damp spells.
Flowering generally completes in nine to eleven weeks under stable indoor conditions. Outdoor growers should aim to finish before late autumn weather sets in.
Indoor yields are medium to high when trained and given strong light and nutrients. Outdoors the plant can reward with large colas if the season stays dry and warm enough early on.
Plants develop a lanky, open structure with long internodes that respond well to topping and low-stress training. Expect taller growth if left untrained, particularly outdoors.
Indoors this variety performs well under controlled light and ventilation which suits Glasgow growers who prefer home cultivation. Outdoors in Glasgow it needs a sheltered spot and careful monitoring for late-season damp.
Growing Grapefruit Haze in Glasgow requires planning for cool northern summers and occasional damp periods. Choose a controlled indoor environment or a sheltered outdoor microclimate to mitigate the cooler, humid weather in Glasgow.
The high carries an uplifting, focused energy that suits creative tasks and social situations. The body remains light, avoiding heavy sedation while offering mild relaxation.
The flavour profile is dominated by fresh grapefruit with citrus haze notes and a subtle pine backbone. Smoke is clean and sweet with a zesty aftertaste.
Frequently Asked Questions
Common questions about this strain, covering growth, effects, and suitability for UK conditions.
Start with adequate ventilation, extract fans and carbon filtration, then scale LED or HPS lighting to the grow space. Maintain temperature around 22–26°C lights on and relative humidity 40–50% in flower.
Low-stress training and topping help control the lanky sativa stretch and promote even canopy development. A SCROG net can maximise yields by exposing more bud sites to light.
Switch to a bloom formulation higher in phosphorus and potassium once flowering starts and taper nitrogen. Watch for tip burn and flush lightly if salts build up.
Keep good airflow through the canopy, reduce humidity during late flower and avoid dense foliage that traps moisture. Remove lower fan leaves and consider a dehumidifier in humid conditions.
Harvest when trichomes are mostly cloudy with a few ambers for a balanced uplift and mild body effect. Check pistils and trichome development across several buds to pick the optimal window.
Dry slowly for 7–12 days in a dark, ventilated space at 45–55% RH and 18–21°C, then cure in jars for at least two weeks. Proper curing brings out citrus terpenes and smooths the smoke.
Yes, feminised seeds reduce the risk of males and maximise space efficiency in indoor grows. They simplify planning for limited square footage and ensure predictable female plants.
Grapefruit Haze responds well to rich organic soil with a balanced feeding regimen and also performs in well-managed hydroponic systems. Soil tends to be more forgiving for growers handling variable temperatures.
Aphids, spider mites and powdery mildew are the main threats, especially outdoors in humid seasons. Regular inspections and preventative measures like sticky traps and beneficial insects help early control.
Use 18/6 for veg to encourage steady growth and switch to 12/12 to initiate flowering. Allow a gradual transition and ensure stable dark periods to prevent stress and hermaphroditism.
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