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Black Flag Horticulture
  • Home
  • Bundle Deals
  • Growing Media
    • Coco Substrates
    • Soil Substrates
    • Rockwool & Jiffy Plugs
    • All Growing Media
  • Propagation
    • Propagators
    • Rockwool & Plugs
    • Rooting Agents
  • Environments
    • Propagation Grow Tents
    • Lighthouse Tents
    • Environments Accessories
  • Climate
    • Ducting & Accessories
    • Extraction & Filtering
    • Fans
    • Sheeting
    • Tapes
    • Temperature Control
    • Humidity Control
    • Odour Control
    • Metal Work
  • Lights
    • LED Grow Lights
    • Grow Lights
    • Grow Light Accessories
    • Shop All
  • Nutrients
    • Base Feeds
    • Root Development
    • Veg Boosters
    • Enzymes
    • Mag/Cal
    • Flowering Boosters
    • P.K
    • Plant Finishers
    • pH Regulators
    • Silicon
  • Organics
    • Organic Nutrients
    • Organic Growing Media
    • Organic Plant Additives
  • Irrigation
    • Connectors
    • Pipes
    • Chillers
  • Plant Health
    • Pest & Disease Control
    • Plant Health
  • Pots & Trays
    • Plant Pots
    • Fabric Plant Pots
    • Saucers
  • Tools
    • Tanks & Reservoirs
    • Measuring Tools
    • Plant Support
    • Magical Butter Machine
    • Harvesting
    • Metering & Timers
    • Spray Bottles & Pumpers
    • All Tools & Accessories
  • Catalogue
    • Shop All
    • Brands
    • All Collections
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    • About Us
    • Contact Us
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  • Ona - Sprays (250ml) (Odour Control)

    Ona - Sprays (250ml) (Odour Control)

    Sale

    Ona - Sprays (250ml) (Odour Control)

    Regular price £7.90 GBP
    Regular price £9.99 GBP Sale price £7.90 GBP
    Unit price /  per 
    Sale
  • intense Nutrients - Down 'n' Dirty (PH Down)

    intense Nutrients - Down 'n' Dirty (PH Down)

    intense Nutrients - Down 'n' Dirty (PH Down)

    Regular price From £17.95 GBP
    Regular price Sale price From £17.95 GBP
    Unit price /  per 
  • Intense Nutrients - OG Granules - 350g

    Intense Nutrients - OG Granules (Mycorrhizals)

    Intense Nutrients - OG Granules (Mycorrhizals)

    Regular price From £16.95 GBP
    Regular price Sale price From £16.95 GBP
    Unit price /  per 
  • Intense Nutrients - Dirt Bloom - 1 Litre

    Intense Nutrients - Dirt: Bloom (Base Feed)

    Intense Nutrients - Dirt: Bloom (Base Feed)

    Regular price From £15.00 GBP
    Regular price Sale price From £15.00 GBP
    Unit price /  per 
  • Canna - Aqua Clay Pebbles - 45 Litres

    CANNA - Aqua Clay - Clay Pebles (45L Bag)

    Sale

    CANNA - Aqua Clay - Clay Pebles (45L Bag)

    Regular price £15.95 GBP
    Regular price £23.72 GBP Sale price £15.95 GBP
    Unit price /  per 
    Sale
  • Canna - Rhizotonic - 1 Litre

    Canna - Rhizotonic - Root Stimulator

    Canna - Rhizotonic - Root Stimulator

    Regular price From £34.99 GBP
    Regular price Sale price From £34.99 GBP
    Unit price /  per 
  • Advanced Nutrients - Sensi Coco Bloom - A&B Set - 1 Litre - Coco Base Feed

    Advanced Nutrients - Sensi Coco: Bloom (A & B Set) - pH Perfect®

    Sale

    Advanced Nutrients - Sensi Coco: Bloom (A & B Set) - pH Perfect®

    Regular price From £24.95 GBP
    Regular price £28.95 GBP Sale price From £24.95 GBP
    Unit price /  per 
    Sale
  • Buddhas Tree - PK 9/18 - PK Booster

    Buddhas Tree - PK 9/18 - PK Booster

    Buddhas Tree - PK 9/18 - PK Booster

    Regular price £74.99 GBP
    Regular price Sale price £74.99 GBP
    Unit price /  per 
  • Advanced Nutrients - Voodoo Juice® - (Root Mass Expanders)

    Advanced Nutrients - Voodoo Juice® - (Root Mass Expanders)

    Advanced Nutrients - Voodoo Juice® - (Root Mass Expanders)

    Regular price £61.95 GBP
    Regular price Sale price £61.95 GBP
    Unit price /  per 
  • Intense Nutrients - Kickstart - 1 Litre

    Intense Nutrients - Kickstart (Propagation)

    Intense Nutrients - Kickstart (Propagation)

    Regular price From £7.45 GBP
    Regular price Sale price From £7.45 GBP
    Unit price /  per 
  • Advanced Nutrients - Big Bud Coco

    Advanced Nutrients - Big Bud® - Coco - Bloom Booster

    Sale

    Advanced Nutrients - Big Bud® - Coco - Bloom Booster

    Regular price £40.95 GBP
    Regular price £43.95 GBP Sale price £40.95 GBP
    Unit price /  per 
    Sale
  • Ona - Gels (400g) (Odour Control)

    Ona - Gels (400g) (Odour Control)

    Ona - Gels (400g) (Odour Control)

    Regular price £9.40 GBP
    Regular price Sale price £9.40 GBP
    Unit price /  per 
  • Intense Nutrients - Potting Shed: Crazy Chilli - 1 Litre

    Intense Nutrients - Potting Shed: Crazy Chilli

    Intense Nutrients - Potting Shed: Crazy Chilli

    Regular price £11.99 GBP
    Regular price Sale price £11.99 GBP
    Unit price /  per 
  • Intense Nutrients - Potting Shed: Totally Tomato - 1 Litre

    Intense Nutrients - Potting Shed: Totally Tomato

    Intense Nutrients - Potting Shed: Totally Tomato

    Regular price £11.99 GBP
    Regular price Sale price £11.99 GBP
    Unit price /  per 
  • Canna - CannaZym - Plant Additive - 1 Litre

    Canna - Cannazym - Enzymes

    Canna - Cannazym - Enzymes

    Regular price £18.99 GBP
    Regular price Sale price £18.99 GBP
    Unit price /  per 
  • Canna - BioCanna - Bio Boost - Organic Plant Bloom Stimulator

    Canna - Bio Boost - Organic Plant Bloom Stimulator

    Sale

    Canna - Bio Boost - Organic Plant Bloom Stimulator

    Regular price £19.99 GBP
    Regular price £29.99 GBP Sale price £19.99 GBP
    Unit price /  per 
    Sale
  • Advanced Nutrients - OverDrive - 500ml

    Advanced Nutrients - Overdrive® - Finisher/Ripener

    Sale

    Advanced Nutrients - Overdrive® - Finisher/Ripener

    Regular price From £24.05 GBP
    Regular price £28.95 GBP Sale price From £24.05 GBP
    Unit price /  per 
    Sale
  • Intense Nutrients - PK Ultra - Pro Series

    Intense Nutrients - PK Ultra -Pro Series (PK Booster)

    Intense Nutrients - PK Ultra -Pro Series (PK Booster)

    Regular price From £34.95 GBP
    Regular price Sale price From £34.95 GBP
    Unit price /  per 
  • Atami Bloombastic - Flowering Booster - 325ml

    Atami - Bloombastic - The ‘Bling Bling’ for your plants!

    Sale

    Atami - Bloombastic - The ‘Bling Bling’ for your plants!

    Regular price From £47.99 GBP
    Regular price £55.19 GBP Sale price From £47.99 GBP
    Unit price /  per 
    Sale
  • Atami - Worm Delight - Worm Casting Substrate Additive - 20 Litres

    Atami - Worm Delight (20L)

    Sale

    Atami - Worm Delight (20L)

    Regular price £9.00 GBP
    Regular price £13.00 GBP Sale price £9.00 GBP
    Unit price /  per 
    Sale
  • Canna - CalMag Agent - Water Enhancement - 1 Litre

    Canna CalMag Agent for Balanced Calcium and Magnesium Supplementation

    Sale

    Canna CalMag Agent for Balanced Calcium and Magnesium Supplementation

    Regular price £13.96 GBP
    Regular price £19.43 GBP Sale price £13.96 GBP
    Unit price /  per 
    Sale
  • Intense Nutrients - Roots Ultra - Pro Series

    Intense Nutrients - Roots Ultra - Pro Series (Root Stimulant)

    Intense Nutrients - Roots Ultra - Pro Series (Root Stimulant)

    Regular price £34.99 GBP
    Regular price Sale price £34.99 GBP
    Unit price /  per 
  • Advanced Nutrients - Sensi Coco Grow - A&B Set - 1 Litre - Coco Base Feed

    Advanced Nutrients - Sensi - Coco: Grow (A&B Set) - pH Perfect®

    Sale

    Advanced Nutrients - Sensi - Coco: Grow (A&B Set) - pH Perfect®

    Regular price From £24.95 GBP
    Regular price £28.95 GBP Sale price From £24.95 GBP
    Unit price /  per 
    Sale
  • Canna - Spanner - For Opening 5 Litre & 10 Litre Bottles

    Canna - Spanner

    Canna - Spanner

    Regular price £6.48 GBP
    Regular price Sale price £6.48 GBP
    Unit price /  per 
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