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Grapefruit Romulan

Feminised

Grapefruit Romulan is a compact, indica-dominant hybrid combining bright citrus notes with a calm, relaxing finish and good tolerance for cool, maritime conditions.

Why choose Grapefruit Romulan?
  • Citrus rind aroma with earthy depth
  • Compact growth ideal for limited spaces
  • Handles cool, maritime conditions well
THC 18-22%
CBD Low (<1%)
Lineage Grapefruit x Romulan
Genotype Indica-dominant hybrid
Difficulty Intermediate
Flowering 8-9 weeks
Height Bushy, compact; 80–140 cm
Yield Medium-high (350–450 g/m² indoors)
Taste Grapefruit, Earthy, Pine
Seed Type Feminised
Climate Cool maritime; tolerant of rainy autumn harvest season
Effects Relaxed, Uplifted, Focused
Environment Both

About Grapefruit Romulan

Grapefruit Romulan is an indica-dominant hybrid bred from Grapefruit x Romulan that pairs sharp citrus flavour with dense, resinous buds. It suits growers in cooler, maritime regions who can manage airflow and drying during a rainy autumn harvest season and who want a reliable plant with modest height and respectable yields.

Grow Difficulty:

Grapefruit Romulan handles moisture better than many indicas but requires vigilant mould prevention in a rainy autumn harvest season. Regular canopy maintenance and airflow are necessary to keep buds healthy.

Flowering Time:

Flowering usually completes in 8 to 9 weeks under ideal conditions. A slight extension may occur if temperatures stay cool late into the season.

Yield:

Yield is medium to high indoors with around 350–450 g/m² achievable under good care. Outdoor yields are respectable but depend on keeping plants dry during the final weeks.

Height:

Plants remain relatively compact, forming bushy, sturdy colas that suit limited spaces. Expect heights around 80–140 cm depending on training and light levels.

Environment:

Indoors it responds well to SCROG and low-stress training, making it manageable in modest grow tents. In Inverness outdoor sites with good sun exposure and shelter from wind produce the best results.

Climate:

Inverness growers should expect a rainy autumn harvest season and plan drying and mould prevention accordingly. Grapefruit Romulan tolerates cool, maritime conditions but performs best when flowered under drier, sheltered microclimates in Inverness.

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 buds have started to show grey mould late in flowering. What should I do?
A
Verified answer
Remove affected buds immediately, increase airflow and humidity control, and consider harvesting early if the wet weather persists.
Common question Posted by Urbanseedbank Answered
Q
How should I adjust nutrients approaching harvest in Inverness?
A
Verified answer
Reduce nitrogen in the final two weeks and switch to a low-nutrient flush to promote even curing and reduce risk of harsh smoke.
Common question Posted by Urbanseedbank Answered
Q
What's the best drying setup when it's raining through harvest?
A
Verified answer
Use a dedicated indoor drying room with a dehumidifier and gentle air circulation; maintain 45–55% RH and 15–20°C if possible.
Common question Posted by Urbanseedbank Answered
Q
Which topping or training routine keeps plants compact?
A
Verified answer
Topping once and following with LST or a SCROG net keeps the canopy even and prevents vertical stretch while maximising bud sites.
Common question Posted by Urbanseedbank Answered
Q
How do I judge trichomes for perfect timing?
A
Verified answer
Use a 30–60× loupe; harvest when most trichomes are cloudy and a few are amber for balanced effects, earlier for more cerebral lift.

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