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Blackwater

Feminised

Blackwater is an indica-dominant hybrid bred for compact, resinous buds and reliable indoor performance.

Why choose Blackwater?
  • Dense, resinous buds for evening use
  • Compact plants suited to SCROG
  • Robust flavour with a sweet dark-berry note
THC 18-22%
CBD <1%
Lineage Blackwater x Northern Lights
Genotype Indica-dominant hybrid
Difficulty Intermediate
Flowering 8-9 weeks
Height Short to medium
Yield Medium to high
Taste earthy, blackberry, spice
Seed Type Feminised
Climate Humid Indoor
Effects relaxing, mild euphoria, sleepy
Environment Indoor and outdoor

About Blackwater

Blackwater combines compact growth and heavy resin production to suit controlled indoor environments. It offers a deep, sedative effect with an earthy, blackberry-forward flavour and performs well under careful humidity management.

Grow Difficulty:

This strain suits growers with some experience and good environmental control. Pay attention to ventilation in humid indoor grow rooms to avoid mould.

Flowering Time:

Flowering usually completes within eight to nine weeks. Trichome development peaks near the end of that window.

Yield:

Yields are medium to high for an indica-dominant plant when trained correctly. Dense bud sites reward careful defoliation and support.

Height:

Plants stay short to medium with sturdy branches. The structure makes them suitable for SCROG and sea-of-green setups.

Environment:

Indoors it thrives under stable conditions and controlled lighting. Outdoors it performs reliably in sheltered sites in Lancashire with a short growing season.

Climate:

Growing Blackwater in Lancashire requires strict humidity control because the region can be damp. In humid indoor grow rooms ensure dehumidification and airflow to prevent bud rot.

Frequently Asked Questions

Common questions about this strain, covering growth, effects, and suitability for UK conditions.

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Choose seed quantity
Selected: 5 Seeds
£53.33 £40.00
£8.00 / seed • You save £13.33
Accepted payment methods
100% Satisfaction Guarantee • Secured Payments
Urbanseedbank Support

Questions & Answers

Customer questions and answers from the Urbanseedbank team. Submit your own question and we’ll respond after review.

5 questions Answered posts are shown first.
Common question Posted by Urbanseedbank Answered
Q
My RH spikes during lights-off, what can I do?
A
Verified answer
Lower the room temperature slightly at lights-off, run a dehumidifier timed for that period, and improve exhaust efficiency.
Common question Posted by Urbanseedbank Answered
Q
Should I defoliate before the stretch?
A
Verified answer
Do minimal defoliation before the stretch; focus on removing only overlapping fan leaves to let light reach lower nodes.
Common question Posted by Urbanseedbank Answered
Q
I see powdery mildew on a lower leaf, how urgent is it?
A
Verified answer
Treat quickly by removing affected leaves, increasing airflow, and applying a safe, tested fungicide or potassium bicarbonate spray.
Common question Posted by Urbanseedbank Answered
Q
What light schedule gives best resin on Blackwater?
A
Verified answer
Use a 12/12 schedule for flowering with full-spectrum LEDs or HPS and maintain consistent dark periods without interruptions.
Common question Posted by Urbanseedbank Answered
Q
How do I support heavy buds late in flowering?
A
Verified answer
Use plant ties, netting or bamboo canes to support colas and prevent branch breakage as buds fatten.

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