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.

  • Athena PK Blended Bloom Enhancer in different sizes, arranged against a clean white background.Athena Blended Line PK – Low-Nitrogen Phosphorus & Potassium Bloom Booster
    Athena PK Blended Bloom Enhancer in different sizes, arranged against a clean white background.Athena Blended Line PK – Low-Nitrogen Phosphorus & Potassium Bloom Booster
    Athena PK bloom booster 3.8 litre bottleAthena Blended Line PK – Low-Nitrogen Phosphorus & Potassium Bloom Booster
    Athena PK bloom booster 18.9 litre containerAthena Blended Line PK – Low-Nitrogen Phosphorus & Potassium Bloom Booster
    Save £2.96
    Athena

    Athena Blended Line PK – Low-Nitrogen Phosphorus & Potassium Bloom Booster

    £16.99
    £16.99 £19.95

    Athena PK – Low-Nitrogen Bloom Booster for Flowering Plants Athena PK is a concentrated liquid phosphorus and potassium bloom booster designed to supplement flowering plants from...

    SIZE: 1 QT
  • VitaLink Coir Classic Bloom nutrient containers in assorted sizesVitaLink Coir Classic Bloom Hard Water 1 litre bottle
    VitaLink Coir Classic Bloom nutrient containers in assorted sizesVitaLink Coir Classic Bloom Hard Water 1 litre bottle
    VitaLink Coir Classic Bloom Hard Water 1 litre bottleVitaLink Coir Classic Bloom Hard Water 1 litre bottle
    VitaLink Coir Classic Bloom Hard Water 5 litre containerVitaLink Coir Classic Bloom Hard Water 1 litre bottle
    VitaLink Coir Classic Bloom Soft Water 5 litre containerVitaLink Coir Classic Bloom Hard Water 1 litre bottle
    VitaLink

    VitaLink Coir Classic Bloom – One-Part Coco Flowering Nutrient

    £7.00
    £7.00 £7.00

    VitaLink Coir Classic Bloom Nutrient for Coco Coir VitaLink Coir Classic Bloom is a complete one-part liquid nutrient formulated for flowering and fruiting plants grown in...

    Size: 1L
    WATER TYPE: SOFT
  • VitaLink Hydro MAX Grow A&B – Soft & Hard Water – 1L & 5L SetsVitaLink Hydro MAX Grow A&B – Soft & Hard Water – 1L & 5L Sets
    VitaLink Hydro MAX Grow A&B – Soft & Hard Water – 1L & 5L Sets
    VitaLink Hydro MAX Grow A&B – Soft & Hard Water – 1L & 5L Sets
    VitaLink Hydro MAX Grow A&B – Soft & Hard Water – 1L & 5L Sets
    VitaLink Hydro MAX Grow A&B – Soft & Hard Water – 1L & 5L Sets
    VitaLink

    VitaLink Hydro MAX Grow A&B – Soft & Hard Water – 1L & 5L Sets

    £11.95
    £11.95 £11.95

    VitaLink Hydro MAX Grow A&B Hydroponic Nutrients VitaLink Hydro MAX Grow A&B is a two-part nutrient for the vegetative growth stage in hydroponic systems. Choose from...

    Size: 1L
    WATER TYPE: SOFT
  • Two blue Vitalink earth MAX liquid plant nutrients containers on a white background: a 5L bottle in front of a 50L jerrycan. Both feature a label with a soil texture graphic and blue, white, and orange branding.A bottle of VITAUNK Earth Max soil supplement for bloom, featuring a blue bottle with a clear cap and a label showing soil texture and colorful hexagonal accents.
    Two blue Vitalink earth MAX liquid plant nutrients containers on a white background: a 5L bottle in front of a 50L jerrycan. Both feature a label with a soil texture graphic and blue, white, and orange branding.A bottle of VITAUNK Earth Max soil supplement for bloom, featuring a blue bottle with a clear cap and a label showing soil texture and colorful hexagonal accents.
    A 5L blue plastic canister of Vitalink earth MAX soil supplement, featuring a detailed product label with soil imagery and brand logos, set against a plain white background.A bottle of VITAUNK Earth Max soil supplement for bloom, featuring a blue bottle with a clear cap and a label showing soil texture and colorful hexagonal accents.
    VitaLink

    VitaLink Earth MAX Bloom – One-Part Soil Flowering Nutrient

    £10.00
    £10.00 £10.00

    VitaLink Earth MAX Bloom Nutrient for Soil and Compost VitaLink Earth MAX Bloom is a complete one-part liquid base nutrient for flowering and fruiting plants grown...

    Size: 1L
  • Three blue Vitalink Coco Coir Growth Feed containers of 5L sizes arranged on a white background, including two large jugs and two smaller bottles.A bottle of Vitalink Classic Coir Coco Coir Growth Feed for hard water plants, featuring a blue bottle with a green and brown label, on a white background.
    Three blue Vitalink Coco Coir Growth Feed containers of 5L sizes arranged on a white background, including two large jugs and two smaller bottles.A bottle of Vitalink Classic Coir Coco Coir Growth Feed for hard water plants, featuring a blue bottle with a green and brown label, on a white background.
    A bottle of Vitalink Classic Coir Coco Coir Growth Feed for hard water plants, featuring a blue bottle with a green and brown label, on a white background.A bottle of Vitalink Classic Coir Coco Coir Growth Feed for hard water plants, featuring a blue bottle with a green and brown label, on a white background.
    VitaLink Coir Classic Grow Hard Water nutrient in a 5 litre blue jerrycan.A bottle of Vitalink Classic Coir Coco Coir Growth Feed for hard water plants, featuring a blue bottle with a green and brown label, on a white background.
    A 5-liter blue plastic bucket of Vitalink Classic Coco Coir Growth Feed, featuring a colorful label with coconut coir texture and a red 'Vitalink Classic' badge.A bottle of Vitalink Classic Coir Coco Coir Growth Feed for hard water plants, featuring a blue bottle with a green and brown label, on a white background.
    VitaLink

    VitaLink Coir Classic Growth – One-Part Coco Grow Nutrient

    £7.00
    £7.00 £7.00

    VitaLink Coir Classic Growth Nutrient for Coco Coir VitaLink Coir Classic Growth is a complete one-part liquid base nutrient for plants growing in coco coir during...

    Size: 1L
    WATER TYPE: SOFT
  • VitaLink Chill 250ml and 1 litre bottles togetherVitaLink Chill 1 litre heat stress additive bottle
    VitaLink Chill 250ml and 1 litre bottles togetherVitaLink Chill 1 litre heat stress additive bottle
    VitaLink

    VitaLink Chill Heat Stress Additive – 250ml & 1L

    £20.00
    £20.00 £20.00

    VitaLink Chill Heat Stress Additive VitaLink Chill is a plant biostimulant designed to support plants during hot conditions. Available in 250ml and 1 litre bottles, it...

    Size: 250ML
  • Evoponic Roxy Early Flowering EnhancerEvoponic Roxy Early Flowering Enhancer
    Evoponic Roxy Early Flowering Enhancer
    Evoponic

    Evoponic Roxy Early Flowering Enhancer

    £25.00
    £25.00

    Evoponic Roxy Early Flowering Enhancer Evoponic Roxy is a concentrated plant-extract flowering enhancer developed for a short, targeted application during early flowering. It is designed to...

    Size: 250ML
  • Evoponic Evo Accelerator Full-Cycle Growth BiostimulantEvoponic Evo Accelerator Full-Cycle Growth Biostimulant
    Evoponic Evo Accelerator Full-Cycle Growth Biostimulant
    Evoponic

    Evoponic Evo Accelerator Full-Cycle Growth Biostimulant

    £39.95
    £39.95

    Evoponic Evo Accelerator Full-Cycle Growth Biostimulant Evoponic Evo Accelerator is a concentrated plant-extract biostimulant designed to support plant development throughout vegetative growth and flowering. It works...

    Size: 1L
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