Hydroponic Nutrients & Plant Feed

Shop hydroponic nutrients and plant feed for indoor growing across hydroponic systems, coco coir and soil. The SteelRoots range includes base grow and bloom nutrients, flowering boosters, root and growth additives, CalMag and nutrient supplements, organic fertilisers, enzymes, propagation nutrients, foliar feeds, mycorrhizal products and flushing and finishing formulas.

Choose from established plant nutrition brands including CANNA, Athena, Advanced Nutrients, BioBizz, SHOGUN, Plagron, Dutch Pro, VitaLink, Nutrifield, Growth Technology, Plant Magic, House & Garden and Growers Ark. The collection covers complete base-feeding programmes alongside specialist additives and supplements, making it easier to find plant nutrition for different growth stages, growing media and feeding systems.

Nutrient formulations, application methods and suitability vary between products. Check the individual product instructions when selecting nutrients for hydroponic, coco or soil growing, particularly when combining base nutrients with boosters, supplements or additives. For help working out nutrient quantities by reservoir size and growth stage, use the SteelRoots Hydroponic Nutrient Calculator.

  • Evoponic BBC2 120g
    Evoponic

    Evoponic BBC2 120g

    £24.95
    £24.95

    BBC2(Beneficial Bacterial Culture TWO)20 million colony forming units per gram of product. We screen over 3000 strains and chose a combination that work TOGETHER, not in...
  • Plagron Power Buds 250 ml, 500 ml and 1 litre bottles with 5 litre, 10 litre and 20 litre jerrycans on a white background.Plagron Power Buds 250 ml purple bottle with white cap on a white background.
    Plagron Power Buds 250 ml, 500 ml and 1 litre bottles with 5 litre, 10 litre and 20 litre jerrycans on a white background.Plagron Power Buds 250 ml purple bottle with white cap on a white background.
    Plagron Power Buds 500 ml purple bottle with white cap on a white background.Plagron Power Buds 250 ml purple bottle with white cap on a white background.
    Plagron Power Buds 1 litre purple bottle with white cap on a white background.Plagron Power Buds 250 ml purple bottle with white cap on a white background.
    Plagron Power Buds 5 litre purple jerrycan on a white backgroundPlagron Power Buds 250 ml purple bottle with white cap on a white background.
    Plagron Power Buds 10 litre purple jerrycan with purple product label on a white backgroundPlagron Power Buds 250 ml purple bottle with white cap on a white background.
    Plagron Power Buds 20 litre purple jerrycan on a white background.Plagron Power Buds 250 ml purple bottle with white cap on a white background.
    Plagron

    Plagron Power Buds | Flowering Biostimulant

    £16.99
    £16.99
    £67.96 l

    Plagron Power Buds is a liquid flowering biostimulant designed to support flower formation as plants move from growth into flowering. It can be added alongside a...

    SIZE: 250 ML
  • Xtreme Gardening Azos Nitrogen-Fixing Bacteria Root InoculantXtreme Gardening Azos Nitrogen-Fixing Bacteria Root Inoculant
    Xtreme Gardening Azos Nitrogen-Fixing Bacteria Root Inoculant
    Xtreme Gardening

    Xtreme Gardening Azos Nitrogen-Fixing Bacteria Root Inoculant

    £19.95
    £19.95

    Xtreme Gardening Azos – Beneficial Nitrogen-Fixing Bacteria for Roots & Transplants Xtreme Gardening Azos is a wettable-powder beneficial bacteria root inoculant containing Azospirillum brasilense. Designed for...

    Size: 2OZ
  • Plant Success Great White
    Plant Success

    Plant Success Great White

    £12.95
    £12.95

    PLANT SUCCESS GREAT WHITE Great white is a diverse blend of highly concentrated beneficial microbes in a cutting edge formula to boost the health and life...

    Size: 28G
  • VitaLink Buddy PK additive in 250 ml, 1 litre and 5 litre containersVitaLink Buddy PK additive 250 ml bottle
    VitaLink Buddy PK additive in 250 ml, 1 litre and 5 litre containersVitaLink Buddy PK additive 250 ml bottle
    VitaLink Buddy PK additive 1 litre bottleVitaLink Buddy PK additive 250 ml bottle
    VitaLink Buddy PK additive 5 litre containerVitaLink Buddy PK additive 250 ml bottle
    VitaLink

    VitaLink Buddy PK Additive – Flowering Supplement

    £5.50
    £5.50 £4.50

    VitaLink Buddy PK Additive for Flowering Plants VitaLink Buddy is a liquid phosphorus and potassium supplement designed to support flowering and fruiting alongside a complete base...

    Size: 250ML
  • VitaLink Hydro MAX Bloom A&B – Hydroponic Flowering NutrientsVitaLink Hydro MAX Bloom A&B – Hydroponic Flowering Nutrients
    VitaLink Hydro MAX Bloom A&B – Hydroponic Flowering Nutrients
    VitaLink Hydro MAX Bloom A&B – Hydroponic Flowering Nutrients
    Two blue plastic jugs of VITALINK hydro MAX plant growth regulator and bloom booster on a white background.VitaLink Hydro MAX Bloom A&B – Hydroponic Flowering Nutrients
    VitaLink Hydro MAX Bloom A&B soft-water nutrients in two blue 5 litre jerrycans.VitaLink Hydro MAX Bloom A&B – Hydroponic Flowering Nutrients
    VitaLink

    VitaLink Hydro MAX Bloom A&B – Hydroponic Flowering Nutrients

    £11.95
    £11.95 £11.95

    VitaLink Hydro MAX Bloom A&B for Hydroponic Flowering VitaLink Hydro MAX Bloom A&B is a complete two-part liquid base nutrient for flowering and fruiting plants grown...

    Size: 1L
    WATER TYPE: SOFT
  • Evoponic Bud Honey Carbohydrate BiostimulantEvoponic Bud Honey Carbohydrate Biostimulant
    Evoponic Bud Honey Carbohydrate Biostimulant
    Evoponic Bud Honey Carbohydrate Biostimulant
    Evoponic Bud Honey Carbohydrate Biostimulant
    Evoponic

    Evoponic Bud Honey Carbohydrate Biostimulant

    £11.95
    £11.95

    Evoponic Bud Honey for Flowering and Fruiting Plants Evoponic Bud Honey is a liquid carbohydrate biostimulant developed for use during the later flowering and fruiting stages....

    Size: 250ML
  • Evoponic PK Bulk 18-20 Flowering BiostimulantEvoponic PK Bulk 18-20 Flowering Biostimulant
    Evoponic PK Bulk 18-20 Flowering Biostimulant
    Evoponic PK Bulk 18-20 Flowering Biostimulant
    Evoponic

    Evoponic PK Bulk 18-20 Flowering Biostimulant

    £19.95
    £19.95

    Evoponic PK Bulk 18-20 Flowering Biostimulant Evoponic PK Bulk is a highly concentrated liquid phosphorus and potassium supplement developed for flowering and fruiting plants. Its PK...

    Size: 250ML
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