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Fortissimo

Feminised

Fortissimo is an indica-dominant hybrid bred for compact, resin-rich plants suited to limited spaces.

Why choose Fortissimo?
  • Compact plants tailored for small grows
  • Resin-heavy buds with bright citrus notes
  • Reliable eight- to ten-week flowering
THC 18-22%
CBD <1%
Lineage Northern Lights x Skunk
Genotype Indica-dominant hybrid
Difficulty Intermediate
Flowering 8-10 weeks
Height Short to medium
Yield Medium
Taste Earthy, Citrus, Pine
Seed Type Feminised
Climate Cool Highland
Effects Relaxed, Focused, Uplifted
Environment Indoor or sheltered outdoor

About Fortissimo

Fortissimo is an indica-dominant hybrid selected from Northern Lights x Skunk lineage to deliver compact stature, robust resin production and a reliable flowering schedule. The variety suits growers in confined spaces or those seeking manageable outdoor plants in protected sites, offering an earthy-citrus-pine flavour and potent but controllable effects.

Grow Difficulty:

Growing Fortissimo in cool Highland growing conditions requires attentive feeding and strict humidity control. It is an intermediate grow that rewards careful environmental management.

Flowering Time:

Flowering usually completes within eight to ten weeks under indoor lights. Outdoor plants in suitable microclimates can follow a similar schedule if protected from late-season damp.

Yield:

Yields are medium for a compact plant and scale well under sea of green or similar high-density methods. Consistent light and ventilation give the best harvests.

Height:

Plants remain short to medium with dense, conical colas suited to limited spaces. The structure simplifies canopy management and selective pruning.

Environment:

Indoors Fortissimo performs well in controlled tents and small rooms where canopy height is limited. Outdoors in Carmarthenshire it prefers a sheltered, south-facing site with good airflow.

Climate:

Growing Fortissimo in Carmarthenshire with cool Highland growing conditions demands frost avoidance and vigilant mould prevention. Choose early-finishing phenotypes and provide wind protection to reduce disease risk.

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 are showing brown spots late in flower, what is it?
A
Verified answer
Brown spots often indicate bud rot or nutrient deficiency; remove affected areas, improve airflow and lower humidity immediately to halt spread.
Common question Posted by Urbanseedbank Answered
Q
Leaves are clawing after a feed, did I overdo nutrients?
A
Verified answer
Clawing usually signals nutrient burn; flush lightly and reduce feed strength by 25% while monitoring recovery over a week.
Common question Posted by Urbanseedbank Answered
Q
How tight should my SOG spacing be for Fortissimo?
A
Verified answer
Space plants densely but allow enough room for air movement; 9–12 plants per square metre works well in small SOG tents.
Common question Posted by Urbanseedbank Answered
Q
I see stretch in early flowering, is that normal?
A
Verified answer
A one- to two-week stretch is normal; control it with light height adjustments and timely training to prevent canopy overcrowding.
Common question Posted by Urbanseedbank Answered
Q
Should I flush before harvest?
A
Verified answer
Many growers perform a short flush of plain water for 7–10 days before harvest to improve smoke smoothness and terpene clarity.

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