
- Purple power for cooler-climate growers
London Purpz
London Purpz is an indica-dominant strain with deep purple buds and a relaxing, sedative profile. It suits indoor growers seeking compact plants that perform well in cooler UK conditions.
- Deep purple buds with heavy resin
- Compact growth, big yields when trained
- Evening relaxation with a pleasant grape finish
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18-22% |
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0.5-1% |
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Northern Lights x Purple Urkle |
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Indica-dominant hybrid |
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Intermediate |
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8-9 weeks |
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Short to medium (60-120 cm) |
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Medium to high (≈400-500 g/m² indoor) |
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Grape, Earthy, Spice |
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Feminised |
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cool northern summers |
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Relaxed, Euphoric, Sedative |
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Indoor preferred; outdoor possible with shelter in cooler climates |
About London Purpz
London Purpz combines Northern Lights and Purple Urkle genetics to produce a compact, resinous plant with distinctive purple hues. It flowers in around 8–9 weeks and delivers a potent, body-centred high suited to evening use. The strain prefers controlled indoor environments but can be grown outdoors with shelter against damp and late-season cold. Careful airflow and humidity control are essential to protect dense buds in cooler, wetter climates.
London Purpz is an indica-dominant hybrid with dense, purple-hued buds. The plant leans toward a heavy body high while keeping a brief cerebral lift.
THC levels typically fall between 18% and 22%, giving a reliably potent effect. This strength makes it best suited for evening use or for experienced consumers.
CBD is low, generally around 0.5–1%, so therapeutic action is driven mainly by THC. If a higher CBD ratio is required, consider pairing or alternating with a CBD-rich strain.
London Purpz comes from Northern Lights x Purple Urkle, combining resin production with strong purple pigmentation. These parents explain its compact growth and heavy trichome cover.
Seeds are commonly sold Feminised to ensure flowering females for growers. Regular seeds may be available for breeders seeking male genetics.
Growing London Purpz in cool northern summers requires attention to canopy heat and airflow. It is moderately demanding and benefits from tight environmental control to avoid humidity issues.
Flowering finishes in roughly 8–9 weeks under good conditions. Resin production ramps up noticeably during the last fortnight.
Yields are medium to high for a compact variety when trained and fed correctly. Indoors you can aim for roughly 400–500 g/m² with adequate light and nutrition.
Plants remain short to medium with a bushy structure and heavy central colas. This compact habit suits topping and SCROG techniques.
Indoors, London Purpz thrives in controlled environments and fits well into compact grow rooms common in Derbyshire. Outdoors it needs a sheltered, sunny spot in Derbyshire to avoid damp and late-season cold spells.
When grown in Derbyshire with cool northern summers, choose a fast, dry finish to minimise the risk of bud rot. Use dehumidification or increased airflow during the final weeks to protect dense flowers.
The immediate effect is steady relaxation that gradually deepens into physical calm. Mental clarity persists briefly before sedation increases in the later phase.
Flavours centre on grape and sweet berry with an earthy backbone. A subtle spicy finish lingers on the exhale.
Frequently Asked Questions
Common questions about this strain, covering growth, effects, and suitability for UK conditions.
Maintain 20–26°C during the light period and allow a drop of 3–5°C at night to mimic natural cycles and encourage trichome production.
Aim for 40–50% RH in mid-flower and reduce to 35–45% in the final two weeks to lower bud rot risk.
Good horizontal and vertical airflow is essential because dense buds can trap moisture; oscillating fans and canopy circulation are recommended.
Topping early and a SCROG or low-stress training regime maximise light penetration and even out the canopy for higher yields.
Both work, but soil offers forgiveness for beginners while hydro systems can push faster growth and larger yields when dialled in.
Monitor trichomes and plan harvest when most are cloudy with some ambers for a balanced effect; usually around 8–9 weeks of flowering.
Dry slowly at 10–15°C with 50–60% RH for 7–10 days, then jar and burp daily for two weeks before longer-term storage to develop aroma and smoothness.
Spider mites and powdery mildew are common; prevention includes cleanliness, quarantine of new plants, and maintaining stable humidity and airflow.
Increase phosphorus and potassium in mid to late flowering while avoiding excessive nitrogen to support bud development without leafy growth.
Plan zoning for lights, airflow, and extraction; use sealed tents or rooms with adjustable lighting schedules, carbon filtration and balanced intake/exhaust to control odour and climate.
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