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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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  • Intense Nutrients - Mag-Cal - Magnesium Calcium - 1 Litre

    Intense Nutrients - Mag/Cal (Magnesium & Calcium)

    Intense Nutrients - Mag/Cal (Magnesium & Calcium)

    Regular price From £16.95 GBP
    Regular price Sale price From £16.95 GBP
    Unit price /  per 
  • 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
  • Shogun - CalMag - Calcium & Magnesium

    Shogun - CalMag - Calcium & Magnesium

    Sale

    Shogun - CalMag - Calcium & Magnesium

    Regular price From £14.95 GBP
    Regular price £95.00 GBP Sale price From £14.95 GBP
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    Sale
  • Advanced Nutrients - OG Organics™ Sensi Cal Mag Xtra® (MagCal)

    Advanced Nutrients - OG Organics™ Sensi Cal Mag Xtra® (MagCal)

    Sold out

    Advanced Nutrients - OG Organics™ Sensi Cal Mag Xtra® (MagCal)

    Regular price £39.99 GBP
    Regular price £44.99 GBP Sale price £39.99 GBP
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    Sold out
  • Athena Nutrients CaMg, Horticultural Supllies Coventry, Calcium Magnesium, Plant Care

    Athena Nutrients - CaMg

    Sale

    Athena Nutrients - CaMg

    Regular price £20.99 GBP
    Regular price £28.99 GBP Sale price £20.99 GBP
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    Sale
  • BioBizz - Bio Heaven - 1 Litre

    Biobizz - CalMag (Calcium and Magnesium)

    Biobizz - CalMag (Calcium and Magnesium)

    Regular price £19.99 GBP
    Regular price Sale price £19.99 GBP
    Unit price /  per 
  • Plant Magic - Magne-Cal+ - 1 Litre

    Plant Magic - Magne-Cal+ (Magnesium & Calcium)

    Plant Magic - Magne-Cal+ (Magnesium & Calcium)

    Regular price From £18.95 GBP
    Regular price Sale price From £18.95 GBP
    Unit price /  per 
  • British Minerals - CalMag (Calcium Magnesium Supplement)

    British Minerals - CalMag (Calcium Magnesium Supplement)

    British Minerals - CalMag (Calcium Magnesium Supplement)

    Regular price £15.00 GBP
    Regular price Sale price £15.00 GBP
    Unit price /  per 
  • ESSENTIALS PLUS - CALMAG - (Calcium & Magnesium)

    ESSENTIALS PLUS - CALMAG - (Calcium & Magnesium)

    ESSENTIALS PLUS - CALMAG - (Calcium & Magnesium)

    Regular price £7.20 GBP
    Regular price Sale price £7.20 GBP
    Unit price /  per 

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