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We are Proud Stockists of your Favorite Feeds & Additives.

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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
  • Information
    • About Us
    • Contact Us
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  • Mills Nutrients - C4 - Flowering Booster - 5 Litres

    Mills - C4 (Flower Booster)

    Sale

    Mills - C4 (Flower Booster)

    Regular price From £17.95 GBP
    Regular price £21.95 GBP Sale price From £17.95 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 
  • Grow Tools - Plant Bends (50pk) (Low Stress Training)

    Grow Tools - Plant Bends (50pk) (Low Stress Training)

    Grow Tools - Plant Bends (50pk) (Low Stress Training)

    Regular price £9.99 GBP
    Regular price Sale price £9.99 GBP
    Unit price /  per 
  • 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 
  • MDF Contactor Board

    MDF Contactor Board

    MDF Contactor Board

    Regular price £119.95 GBP
    Regular price Sale price £119.95 GBP
    Unit price /  per 
  • BOYU FP-100 Adjustable Pump - 120L/hr

    BOYU FP-100 Adjustable Pump - 120L/hr

    BOYU FP-100 Adjustable Pump - 120L/hr

    Regular price £7.00 GBP
    Regular price Sale price £7.00 GBP
    Unit price /  per 
  • BioBizz - Fish Mix - 1 Litre

    Biobizz - Fish Mix - organic fish emulsion from the North Sea

    Biobizz - Fish Mix - organic fish emulsion from the North Sea

    Regular price From £14.99 GBP
    Regular price Sale price From £14.99 GBP
    Unit price /  per 
  • LightHouse: ULTRALUX- Flat Black White - (2m Width - Thickness 125μm)

    LightHouse: ULTRALUX- Flat Black White - (2m Width - Thickness 125μm)

    Sale

    LightHouse: ULTRALUX- Flat Black White - (2m Width - Thickness 125μm)

    Regular price From £14.95 GBP
    Regular price £30.00 GBP Sale price From £14.95 GBP
    Unit price /  per 
    Sale
  • Pump Up Compression Sprayer - 5L

    Pump Up Compression Sprayer - 5L

    Sale

    Pump Up Compression Sprayer - 5L

    Regular price £19.95 GBP
    Regular price £23.55 GBP Sale price £19.95 GBP
    Unit price /  per 
    Sale
  • EazyPlug Tray x 77 (Organic Dry - 1 tray) - Propagation Growing Media)

    EazyPlug Tray x 77 (Organic Dry - 1 tray) - Propagation Growing Media)

    Sale

    EazyPlug Tray x 77 (Organic Dry - 1 tray) - Propagation Growing Media)

    Regular price £11.99 GBP
    Regular price £14.99 GBP Sale price £11.99 GBP
    Unit price /  per 
    Sale
  • Boveda - Humidity Control: 49% - 8gram satchet

    Boveda - Humidity Control: 49% - 8gram satchet

    Boveda - Humidity Control: 49% - 8gram satchet

    Regular price £5.56 GBP
    Regular price Sale price £5.56 GBP
    Unit price /  per 
  • Plant Magic - Platinum PK 9/18 - 500ml

    Plant Magic - Platinum PK 9/18 (PK Booster)

    Plant Magic - Platinum PK 9/18 (PK Booster)

    Regular price From £31.64 GBP
    Regular price Sale price From £31.64 GBP
    Unit price /  per 
  • Emerald Harvest - Cali Pro Grow (A&B set) - (Base Feed)

    Emerald Harvest - Cali Pro Grow (A&B set) - (Base Feed)

    Emerald Harvest - Cali Pro Grow (A&B set) - (Base Feed)

    Regular price From £0.00 GBP
    Regular price Sale price From £0.00 GBP
    Unit price /  per 
  • BAY6 Grow Tents

    BAY6 Grow Tents

    Sale

    BAY6 Grow Tents

    Regular price From £59.95 GBP
    Regular price £64.99 GBP Sale price From £59.95 GBP
    Unit price /  per 
    Sale
  • Shogun - Dragon Force - 1 Litre

    Shogun - Dragon Force - (Plant Finisher)

    Shogun - Dragon Force - (Plant Finisher)

    Regular price From £9.95 GBP
    Regular price Sale price From £9.95 GBP
    Unit price /  per 
  • PLANT!T - Flexible Tank

    PLANT!T - Flexible Tank

    PLANT!T - Flexible Tank

    Regular price From £52.99 GBP
    Regular price Sale price From £52.99 GBP
    Unit price /  per 
  • RAM - 12L DEHUMIDIFIER - 12L/DAY

    RAM - 12L DEHUMIDIFIER - 12L/DAY

    RAM - 12L DEHUMIDIFIER - 12L/DAY

    Regular price £165.99 GBP
    Regular price Sale price £165.99 GBP
    Unit price /  per 
  • BUDDHAS TREE - FLOWER BURST (Flowering Booster)

    BUDDHAS TREE - FLOWER BURST (Flowering Booster)

    Sale

    BUDDHAS TREE - FLOWER BURST (Flowering Booster)

    Regular price £59.94 GBP
    Regular price £79.99 GBP Sale price £59.94 GBP
    Unit price /  per 
    Sale
  • Luxx Par-Stretch Scrog Nets

    Luxx Par-Stretch Scrog Nets

    Luxx Par-Stretch Scrog Nets

    Regular price £15.00 GBP
    Regular price Sale price £15.00 GBP
    Unit price /  per 
  • Growth Technology - Clonex Pro Start - 3 In 1 Nutrient

    Growth Technology - Clonex Pro Start - 3 In 1 Nutrient

    Growth Technology - Clonex Pro Start - 3 In 1 Nutrient

    Regular price From £8.50 GBP
    Regular price Sale price From £8.50 GBP
    Unit price /  per 
  • CX Horticulture - Wilt Guard - 1 Litre - Plant Protection

    CX Horticulture - Wilt Guard - 1 Litre - Plant Protection

    CX Horticulture - Wilt Guard - 1 Litre - Plant Protection

    Regular price £24.95 GBP
    Regular price Sale price £24.95 GBP
    Unit price /  per 
  • Canna - CANNACURE Concentrate

    Canna - CANNACURE Concentrate

    Canna - CANNACURE Concentrate

    Regular price £23.95 GBP
    Regular price Sale price £23.95 GBP
    Unit price /  per 
  • Grow Gadgets Tube Heaters

    Grow Gadgets Tube Heaters

    Grow Gadgets Tube Heaters

    Regular price From £24.99 GBP
    Regular price Sale price From £24.99 GBP
    Unit price /  per 
  • AquaLabs- Silver Bullet Mist - Grow Room Disinfectant

    AquaLabs- Silver Bullet Mist - Grow Room Disinfectant

    AquaLabs- Silver Bullet Mist - Grow Room Disinfectant

    Regular price £12.99 GBP
    Regular price Sale price £12.99 GBP
    Unit price /  per 
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