LongLine Fibre™
Maximum fibre for construction and textiles
LongLine Fibre™ combines three Stackatrait™ trait categories — Cannabinoid Modification, Fibre Quality, and Climate Resilience — to deliver a fibre-specialist variety with <0.01% THC compliance, 8–12 t/ha straw, 500–720 MPa tensile strength, 50% faster retting, and 120–140 day extended vegetative growth for maximum biomass production.
8-12
t/ha dry straw
30-35%
bast fibre content
500-720
MPa tensile strength
<0.01%
THC by design
2-3 wk
retting time (-50%)
£4,430
avg gross margin/ha
Precision Trait Stack
LongLine Fibre™ combines three Stackatrait™ trait categories, each delivering multiple complementary improvements that compound to create a fibre variety purpose-built for UK construction and textile markets
THC Elimination by Design
Proprietary cannabinoid modification permanently disables THC production, ensuring <0.01% THC in all plant tissues under all environmental conditions. Critical for fibre varieties harvested during or after flowering when THC risk peaks in conventional hemp.
- <0.01% THC guaranteed
- Safe harvest at any growth stage
- Zero crop destruction risk
- Extended harvest flexibility
Maximum Fibre Output & Strength
Multiple precision trait modifications maximise biomass production, fibre architecture, and processing efficiency. Enhanced bast fibre content, improved tensile strength through lignin optimisation, increased cellulose purity, and accelerated retting — cutting field retting time by 50% in UK autumn conditions.
- 2.5–3.5m height, 8–12 t/ha dry straw
- 30–35% bast fibre content
- 500–720 MPa tensile strength, 70–78% cellulose
- 2–3 week retting (vs 4–6 weeks baseline)
UK-Optimised Growth & Disease Protection
A suite of climate adaptation traits reduces the germination threshold to ~8°C for early April sowing, extends vegetative growth to 120–140 days for maximum fibre production, provides tall-stem lodging resistance (<3% even at 3.5m), and includes DiseaseGuard+ broad-spectrum powdery mildew resistance.
- 8°C cold germination, early April sowing
- 120–140 day extended vegetative growth
- <3% lodging even at 2.5–3.5m height
- DiseaseGuard+ powdery mildew resistance
Agronomic Specifications
Detailed growing parameters for optimal fibre production in UK conditions
8-12 t/ha
Dry Straw Yield
30-35%
Bast Fibre Content
2.4-3.5 t/ha
Bast Fibre Extracted
1.2-1.8 t/ha
Textile-Grade Fibre
500-720 MPa
Tensile Strength
70-78%
Cellulose Content
2-3 metres
Fibre Length
120-140 days
Maturity
2.5-3.5 m
Plant Height
<0.01%
THC Level
April – May
Sowing Window
50-70 kg/ha
Sowing Rate
2-3 weeks
Retting Time
80-100 kg N/ha
N Requirement
<3%
Lodging Loss
0.3-0.5 t/ha
Grain (secondary)
Performance Across UK Regions
Scottish Enterprise trials confirmed 7.9 t/ha at 120kg N for current varieties — LongLine Fibre™ targets 40-50% improvement
Southern England
9-12 t/ha straw
2.7-4.2 t/ha bast fibre
+40-50% vs baseline
Optimal conditions for maximum straw production
Midlands
7-9 t/ha straw
2.1-3.2 t/ha bast fibre
+40-50% vs baseline
Strong performance with good retting conditions
Scotland
6-8 t/ha straw
1.8-2.8 t/ha bast fibre
+45-50% vs baseline
Scottish trials show 7.9 t/ha at 120kg N for current varieties
Financial Returns
LongLine Fibre™ delivers 5-10x the gross margin of conventional wheat at £2,380-6,480/ha from three revenue streams
Revenue Streams
Variable Costs
vs UK Arable Crops (Gross Margin/ha)
Sources: DEFRA Chapter 7 Crops 2024, AHDB Harvest 2025
Market Applications
LongLine Fibre™ serves the rapidly growing UK construction and textile markets
Hempcrete Construction
Hemp hurd mixed with lime for carbon-negative building material. UK hempcrete market growing 25%+ annually. LongLine Fibre™ delivers 5-7 t/ha of shives ideal for hempcrete production.
Natural Insulation
Hemp fibre batts and loose-fill insulation with excellent thermal and acoustic properties. Breathable, mould-resistant, and fire-retardant. 2.4-3.5 t/ha of extracted bast fibre per hectare.
Technical Textiles
Premium bast fibre at 500-720 MPa tensile strength for industrial textiles, composites, and non-woven materials. 30% stronger than baseline varieties for automotive and aerospace applications.
Animal Bedding
Hemp shives make excellent, highly absorbent animal bedding. Lower dust than straw, natural odour control, and fully compostable. 5-7 t/ha of shives at £80-120/t.
Voices for Hemp
"Growing hemp as nature designed it is vital to our urgent need to reduce greenhouse gases and ensure the survival of our planet."
Jack Herer
Hemp Advocate & Author of 'The Emperor Wears No Clothes'
"Hemp is one of the greatest, most important substances of our nation."
Thomas Jefferson
3rd President of the United States