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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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  • Superthrive - The Original Vitamin Solution for plants

    Superthrive - The Original Vitamin Solution for plants

    Superthrive - The Original Vitamin Solution for plants

    Regular price From £14.50 GBP
    Regular price Sale price From £14.50 GBP
    Unit price /  per 
  • Intense Nutrients - Runzyme - 1 Litre

    Intense Nutrients - Runzyme (Enzymes)

    Intense Nutrients - Runzyme (Enzymes)

    Regular price From £2.50 GBP
    Regular price Sale price From £2.50 GBP
    Unit price /  per 
  • Intense Nutrients - Silicon Ultra - 250ml

    Intense Nutrients - Silicon Ultra - Pro Series

    Intense Nutrients - Silicon Ultra - Pro Series

    Regular price From £54.95 GBP
    Regular price Sale price From £54.95 GBP
    Unit price /  per 
  • Plant Magic - Evolution 2.0 - Veg Booster - 500ml

    Plant Magic - Evolution 2.0 Veg Boosting Folia Spray

    Sale

    Plant Magic - Evolution 2.0 Veg Boosting Folia Spray

    Regular price From £12.00 GBP
    Regular price £14.99 GBP Sale price From £12.00 GBP
    Unit price /  per 
    Sale
  • Canna - CannaZym - Plant Additive - 1 Litre

    Canna - Cannazym - Enzymes

    Sale

    Canna - Cannazym - Enzymes

    Regular price From £2.50 GBP
    Regular price £146.99 GBP Sale price From £2.50 GBP
    Unit price /  per 
    Sale
  • Ecothrive Neutralise - The Tap Water Dechlorinator

    Ecothrive Neutralise - The Tap Water Dechlorinator

    Ecothrive Neutralise - The Tap Water Dechlorinator

    Regular price From £21.99 GBP
    Regular price Sale price From £21.99 GBP
    Unit price /  per 
  • NPK Industries - Mighty Wash | Powerful Cleaner for Plants and Grow Spaces

    NPK Industries - Mighty Wash | Powerful Cleaner for Plants and Grow Spaces

    Sold out

    NPK Industries - Mighty Wash | Powerful Cleaner for Plants and Grow Spaces

    Regular price £12.49 GBP
    Regular price £15.00 GBP Sale price £12.49 GBP
    Unit price /  per 
    Sold out
  • Mills Nutrients - Vitalize - Plant Vigor Promoter - 1 Litre

    Mills - Vitalize (Plant Aid)

    Sale

    Mills - Vitalize (Plant Aid)

    Regular price From £7.24 GBP
    Regular price £11.99 GBP Sale price From £7.24 GBP
    Unit price /  per 
    Sale
  • Growcentia - Mammoth P (Beneficial Microbes)

    Growcentia - Mammoth P (Beneficial Microbes)

    Growcentia - Mammoth P (Beneficial Microbes)

    Regular price From £119.99 GBP
    Regular price Sale price From £119.99 GBP
    Unit price /  per 
  • Dutch Pro - Amino Strength | Enhance Plant Growth and Resilience

    Dutch Pro - Amino Strength | Enhance Plant Growth and Resilience

    Sold out

    Dutch Pro - Amino Strength | Enhance Plant Growth and Resilience

    Regular price £45.98 GBP
    Regular price £50.00 GBP Sale price £45.98 GBP
    Unit price /  per 
    Sold out
  • Advanced Nutrients - Revive - 1 Litre

    Advanced Nutrients - Revive - Plant Aid

    Sale

    Advanced Nutrients - Revive - Plant Aid

    Regular price £28.95 GBP
    Regular price £34.95 GBP Sale price £28.95 GBP
    Unit price /  per 
    Sale
  • Dr Hydro - Mildwe Protection Spray - 500ml

    Dr Hydro - Mildew Protection Spray (500ml)

    Dr Hydro - Mildew Protection Spray (500ml)

    Regular price £44.99 GBP
    Regular price Sale price £44.99 GBP
    Unit price /  per 
  • Dr Hydro - Venus Spray - 500ml

    Dr Hydro - Venus Spray (500ml) (Female Hormones)

    Dr Hydro - Venus Spray (500ml) (Female Hormones)

    Regular price £11.99 GBP
    Regular price Sale price £11.99 GBP
    Unit price /  per 
  • Growth Technology - Nitrozyme

    Growth Technology - Nitrozyme

    Growth Technology - Nitrozyme

    Regular price £9.01 GBP
    Regular price Sale price £9.01 GBP
    Unit price /  per 
  • BioBizz - Leaf Coat - 1 Litre

    Biobizz - Leaf Coat - protects plants!

    Biobizz - Leaf Coat - protects plants!

    Regular price From £2.50 GBP
    Regular price Sale price From £2.50 GBP
    Unit price /  per 
  • Advanvced Nutrients - Tasty Terpenes™ - Flower Potency & Stalk Strengthener (Previously Nirvana)

    Advanvced Nutrients - Tasty Terpenes™ - Flower Potency & Stalk Strengthener (Previously Nirvana)

    Sale

    Advanvced Nutrients - Tasty Terpenes™ - Flower Potency & Stalk Strengthener (Previously Nirvana)

    Regular price From £15.00 GBP
    Regular price £45.00 GBP Sale price From £15.00 GBP
    Unit price /  per 
    Sale
  • Aptus - Regulator (NUTRITION MANAGER AND ANTI-STRESS PLANT ENHANCER)

    Aptus - Regulator (NUTRITION MANAGER AND ANTI-STRESS PLANT ENHANCER)

    Aptus - Regulator (NUTRITION MANAGER AND ANTI-STRESS PLANT ENHANCER)

    Regular price £249.95 GBP
    Regular price Sale price £249.95 GBP
    Unit price /  per 
  • ESSENTIALS PLUS - GREEN UP (Plant Aid)

    ESSENTIALS PLUS - GREEN UP (Plant Aid)

    ESSENTIALS PLUS - GREEN UP (Plant Aid)

    Regular price £7.10 GBP
    Regular price Sale price £7.10 GBP
    Unit price /  per 
  • ESSENTIALS PLUS - NO STRESS (Plant Aid)

    ESSENTIALS PLUS - NO STRESS (Plant Aid)

    ESSENTIALS PLUS - NO STRESS (Plant Aid)

    Regular price £23.50 GBP
    Regular price Sale price £23.50 GBP
    Unit price /  per 

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