
- Compact, resinous and well suited to controlled UK grows
Black Tuna
Black Tuna is an indica-dominant hybrid with dense, dark buds and a bold earthy-blackberry aroma.
- Dense, dark buds with a sharp blackberry note
- Compact growth ideal for limited spaces
- Reliable resin production for extracts
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18-22% |
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≤1% |
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Black Tuna x Northern Lights |
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Indica-dominant hybrid |
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Moderate |
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8-10 weeks |
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Short to medium |
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Moderate |
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earthy, blackberry, diesel |
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Feminised |
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Cool Northern Summers |
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calming, mood-lifting, soporific |
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Indoor and outdoor |
About Black Tuna
Black Tuna is an indica-dominant hybrid prized for compact growth, resin production and a distinct earthy and blackberry flavour. It performs well indoors with controlled environments and can finish outdoors in milder UK locations when protected from late-season damp.
Black Tuna is an indica-dominant hybrid that produces dense, dark buds. The plant shows compact growth and resin-rich flowers.
THC levels typically range between 18 and 22 percent. That potency delivers a noticeable psychoactive effect without being overwhelming for experienced users.
CBD content is low, generally below one percent. The low CBD balance means effects are driven mainly by THC rather than cannabidiol.
The line traces to Black Tuna x Northern Lights and carries traits from both parents. Northern Lights contributes compactness and resin while Black Tuna adds darker bud colour and aroma.
Seeds are typically sold feminised to reduce male plants and ensure usable flowers. Feminised genetics simplify grow planning for hobbyist and small-scale producers alike.
Growing Black Tuna is moderately demanding and benefits from steady environmental control in cooler regions. It copes with cool northern summers but outdoor crops need careful timing and protection.
Flowering commonly takes eight to ten weeks under good conditions. Growers in variable climates should allow for the longer end of that range.
Yields are moderate and consistent when plants receive stable light and nutrients. Indoor producers can increase harvests with training and canopy control.
Plants remain relatively compact with short internodes and a bushy profile. That structure suits limited spaces and controlled environments.
Indoors Black Tuna responds well to controlled light cycles, ventilation and humidity management. Outdoors in Dorset it can finish but late-season damp and cooler nights require attention.
In Dorset with its cool northern summers Black Tuna needs careful scheduling to avoid autumn rain and low light. Using sheltered outdoor sites or finishing under cover will improve bud development and reduce mould risk.
The high-THC profile brings an initial uplift that settles into deep relaxation. At higher doses the effect becomes sedative and suited to evening use.
Flavours combine earthy base notes with a sweet blackberry mid and a diesel finish. The profile becomes more pronounced with a slow cure.
Frequently Asked Questions
Common questions about this strain, covering growth, effects, and suitability for UK conditions.
A controlled tent or dedicated room with LED or HPS lighting, good ventilation and dehumidification suits Black Tuna well; maintain stable temperatures and moderate humidity for dense flowers.
Provide 12 hours of dark and 12 hours of light for photoperiod plants with an intense light level of around 400–600 µmol/m²/s to encourage resin and trichome production.
Use a balanced vegetative feed, then switch to a bloom formulation with higher phosphorus and potassium during flowering while avoiding excess nitrogen late in bloom.
Keep relative humidity around 40–50% during flowering and improve air circulation around colas to reduce the risk of bud rot in cooler, damper conditions.
Harvest when trichomes are milky with some amber for a balance of potency and sedation, usually around eight to ten weeks of flowering.
Low-stress training and topping work well to create an even canopy and improve light penetration, while SCROG can maximise yields in small spaces.
Inspect plants regularly, use integrated pest management, maintain cleanliness and quarantine new plants to avoid introducing pests and mould.
Yes, organic soil with slow-release nutrients and compost teas supports resin development, but monitor feeding to avoid nutrient lockout in cooler conditions.
Cure buds slowly for at least two to four weeks in a dark, cool place to improve flavour and smoothness, burping jars frequently at first.
It is approachable for those with some basic grow experience but beginners should prepare for humidity control and timing challenges in cooler climates.
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