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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
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  • Intense Nutrients - Wideload Boost - 1 Litre Intense Nutrients - Wideload Boost (Flowering Booster)

    Intense Nutrients - Wideload Boost (Flowering Booster)

    Intense Nutrients - Wideload Boost (Flowering Booster)

    Regular price From £2.50 GBP
    Regular price Sale price From £2.50 GBP
  • Canna - Boost Accelerator - Flowering Booster - 1 Litre Canna - Boost Accelerator - Flowering Booster

    Canna - Boost Accelerator - Flowering Booster

    Sale

    Canna - Boost Accelerator - Flowering Booster

    Regular price From £2.50 GBP
    Regular price £79.99 GBP Sale price From £2.50 GBP
    Sale
  • House & Garden - Bud XL (Flowering Booster) House & Garden - Bud XL (Flowering Booster)

    House & Garden - Bud XL (Flowering Booster)

    House & Garden - Bud XL (Flowering Booster)

    Regular price From £29.99 GBP
    Regular price Sale price From £29.99 GBP
  • Shogun - Sumo Boost - 1 Litre Shogun - Sumo Boost (Flower Booster)

    Shogun - Sumo Boost (Flower Booster)

    Sale

    Shogun - Sumo Boost (Flower Booster)

    Regular price From £2.50 GBP
    Regular price £210.00 GBP Sale price From £2.50 GBP
    Sale
  • Plant Magic - Boost - Flowering Booster - 1 Litre Plant Magic - Boost - Flowering Booster - 5 Litres

    Plant Magic - Boost (Flower Booster)

    Sale

    Plant Magic - Boost (Flower Booster)

    Regular price From £39.95 GBP
    Regular price £45.99 GBP Sale price From £39.95 GBP
    Sale
  • Advanced Nutrients - CarboLoad - 1 Litre Advanced Nutrients - CarboLoad® - Flowering Booster

    Advanced Nutrients - CarboLoad® - Flowering Booster

    Sale

    Advanced Nutrients - CarboLoad® - Flowering Booster

    Regular price From £2.50 GBP
    Regular price £12.00 GBP Sale price From £2.50 GBP
    Sale
  • Plant Detonator - Bud Booster - 1L (Flower Booster)

    Plant Detonator - Bud Booster - 1L (Flower Booster)

    Sale

    Plant Detonator - Bud Booster - 1L (Flower Booster)

    Regular price £26.99 GBP
    Regular price £40.00 GBP Sale price £26.99 GBP
    Sale
  • Shogun - Sumo Active Boost (Hydroponics Flower Booster) Shogun - Sumo Active Boost (Hydroponics Flower Booster)

    Shogun - Sumo Active Boost (Hydroponics Flower Booster)

    Sale

    Shogun - Sumo Active Boost (Hydroponics Flower Booster)

    Regular price From £2.50 GBP
    Regular price £13.00 GBP Sale price From £2.50 GBP
    Sale
  • Grenade Nutrients - Green (Boost & Silicon) Grenade Nutrients - Green (Boost & Silicon)

    Grenade Nutrients - Green (Boost & Silicon)

    Grenade Nutrients - Green (Boost & Silicon)

    Regular price £100.00 GBP
    Regular price Sale price £100.00 GBP
  • Canna - BioCanna - Bio Boost - Organic Plant Bloom Stimulator Canna - 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
    Sale
  • Atami - Rokzbastic - Flowering Booster - 325ml Atami - Rokzbastic 325ml PK 10/20 Flowering Enhancer & Hardener (NO PGR's)

    Atami - Rokzbastic 325ml PK 10/20 Flowering Enhancer & Hardener (NO PGR's)

    Sale

    Atami - Rokzbastic 325ml PK 10/20 Flowering Enhancer & Hardener (NO PGR's)

    Regular price £47.99 GBP
    Regular price £55.99 GBP Sale price £47.99 GBP
    Sale
  • Plagron - Power Buds (Speeds up Flowering)

    Plagron - Power Buds (Speeds up Flowering)

    Sale

    Plagron - Power Buds (Speeds up Flowering)

    Regular price From £19.99 GBP
    Regular price £25.00 GBP Sale price From £19.99 GBP
    Sale
  • HydroTops - Solo Soil: Boost HydroTops - Solo Soil: Boost

    HydroTops - Solo Soil: Boost

    Sale

    HydroTops - Solo Soil: Boost

    Regular price From £2.50 GBP
    Regular price £25.00 GBP Sale price From £2.50 GBP
    Sale
  • Atami - B'cuzz: Coco Booster Uni Atami - B'cuzz: Coco Booster Uni

    Atami - B'cuzz: Coco Booster Uni

    Sale

    Atami - B'cuzz: Coco Booster Uni

    Regular price £27.99 GBP
    Regular price £30.00 GBP Sale price £27.99 GBP
    Sale
  • British Minerals - Fruit Boost (Metabolism Accelerator) British Minerals - Fruit Boost (Metabolism Accelerator)

    British Minerals - Fruit Boost (Metabolism Accelerator)

    Sold out

    British Minerals - Fruit Boost (Metabolism Accelerator)

    Regular price £30.00 GBP
    Regular price Sale price £30.00 GBP
    Sold out
  • BioBizz - Top Max - 1 Litre Biobizz - Top Max - Flowering Booster

    Biobizz - Top Max - Flowering Booster

    Biobizz - Top Max - Flowering Booster

    Regular price From £2.50 GBP
    Regular price Sale price From £2.50 GBP
  • House & Garden: Top Booster (Flowering Booster)

    House & Garden: Top Booster (Flowering Booster)

    Sale

    House & Garden: Top Booster (Flowering Booster)

    Regular price £15.99 GBP
    Regular price £24.99 GBP Sale price £15.99 GBP
    Sale

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