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.

  • Fox Farm Open Sesame
    FOX FARM

    Fox Farm Open Sesame

    £49.99
    £49.99

    Open Sesame® Early Flowering Formula ( 5 - 45 - 19 ) Open Sesame® is a high-phosphorus soluble fertilizer that’s designed to produce large, show stopping...

    Size: 1LB
  • Fox Farm Beastie Bloomz
    FOX FARM

    Fox Farm Beastie Bloomz

    £49.99
    £49.99

    Fox Farm Beastie Bloomz Beastie Bloomz® Soluble Fertilizer (0-50-30)Heavyweight Blossom Builder for Gardeners and Hydroponic Growers Beastie Bloomz® is perfect for gardeners and growers who are...

    Size: 1LB
  • Buddhas Tree Advanced Meta Boost
    Buddha's Tree

    Buddhas Tree Advanced Meta Boost

    £15.00
    £15.00

    Buddhas Trees consider themselves the innovators of plant technology, their award winning formula has got them to 1st in the peoples choice award for Garden Culture...

    Size: 250ML
  • GreenPlanet Massive Bloom1L
    GREENPLANET

    GreenPlanet Massive Bloom1L

    £20.00
    £20.00

    GREENPLANET MASSIVE BLOOM  MASSIVE BLOOM FORMULATION Is engineered for the serious grower. This product is designed to encourage budding, help facilitate bulking, and the ripening of...
  • Monkey Nutrients PK 14/15
    Monkey Nutrients

    Monkey Nutrients PK 14/15

    £16.95
    £16.95

    MONKEY NUTRIENTS PK 14/15 The last flowering piece of the monkey puzzle.  Monkey Nutrients PK 14/15 concentrated ratio of Phosphorus and Potassium is as essential to yield density...

    Size: 250ML
  • Terra Aquatica FinalPart | Late-Stage Blooming Booster
    Terra Aquatica

    Terra Aquatica FinalPart | Late-Stage Blooming Booster

    £8.50
    £8.50

    FINAL PART (formerly RIPEN) by TERRA AQUATICA Final part is a comprehensive plant nutrient used during the late flowering stage of the plant. It is specifically designed...

    Size: 1L
  • Monkey Nutrients Root Shoot
    Monkey Nutrients

    Monkey Nutrients Root Shoot

    £44.95
    £44.95

    MONKEY NUTRIENTS ROOT SHOOT   Happy and healthy root systems are the key to increasing crop yields, quality and flavour. Monkey Nutrients - Root Shoot enhances...

    Size: 300ML
  • A rugged, white plastic 1-quart jug of New Millennium Winter Frost fertilizer. The container features an integrated top handle, a ribbed white cap, and a large central label. The label has a dark blue background showcasing highly detailed, icy blue and silver glowing snowflake crystals underneath stylized, symmetry-mapped 'New Millennium' branding text at the top, with 'WINTER FROST' and the NPK ratio '0.2 - 2.2 - 2.3' cleanly printed at the bottomA wide, heavy-duty white plastic 1-gallon jug of New Millennium Winter Frost ripening solution. The jug is equipped with an ergonomic angled pour handle and a secure white screw cap. The large front label mirrors the signature dark blue winter aesthetic, highlighting an oversized, illuminated ice crystal cluster directly beneath the prominent gothic-style 'New Millennium' logo text
    A wide, heavy-duty white plastic 1-gallon jug of New Millennium Winter Frost ripening solution. The jug is equipped with an ergonomic angled pour handle and a secure white screw cap. The large front label mirrors the signature dark blue winter aesthetic, highlighting an oversized, illuminated ice crystal cluster directly beneath the prominent gothic-style 'New Millennium' logo textA wide, heavy-duty white plastic 1-gallon jug of New Millennium Winter Frost ripening solution. The jug is equipped with an ergonomic angled pour handle and a secure white screw cap. The large front label mirrors the signature dark blue winter aesthetic, highlighting an oversized, illuminated ice crystal cluster directly beneath the prominent gothic-style 'New Millennium' logo text
    New Millennium

    New Millennium Winter Frost | Premium Bloom Finisher Supplement

    £44.95
    £44.95

    Unlock the ultimate genetic potential of your crops with New Millennium Winter Frost, the legendary USA smash-hit bloom finisher and essential oil enhancer. Engineered to safely...

    Size: 1L
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