MasterBlend Hydroponic Fertilizers

MasterBlend is the professional standard in water-soluble hydroponic fertilizers, trusted by commercial greenhouse growers, vertical farms, and serious hobbyists worldwide. Manufactured with only the highest technical-grade nutrients, MasterBlend delivers precise, consistent nutrition for every crop and every system.

MasterBlend Formulas Available

  • 4-18-38 Tomato Formula — the flagship 3-part base for tomatoes, peppers, and most fruiting crops; pairs with calcium nitrate and magnesium sulfate for a complete feed
  • 8-15-36 Lettuce Formula — optimized N-P-K ratio for leafy greens, herbs, and fast-cycling crops in NFT, DWC, and raft systems
  • 9-12-34 Strawberry Formula — tailored potassium and phosphorus balance for berry crops and fruiting plants with high sugar demand
  • 0-12-24 Bloom Formula — low-nitrogen bloom booster for the flowering and fruiting stage; drives brix and fruit set
  • 0-20-42 Bloom Formula — high-phosphorus, high-potassium finish formula for maximum flower and fruit development

Why MasterBlend?

  • Technical-grade purity — no fillers, no impurities, maximum nutrient availability
  • Crop-specific formulations — purpose-built N-P-K ratios for each growth stage and crop type
  • Proven in commercial production — used in large-scale tomato, lettuce, strawberry, and specialty crop operations worldwide
  • Compatible with all systems — drip, NFT, DWC, ebb & flow, and continuous liquid feed (fertigation)
  • Precise EC and pH control — clean formulation makes dialing in your nutrient solution straightforward

Available Sizes

Several MasterBlend formulas are available in 1 lb, 4 lb, and 25 lb bags to suit home growers and commercial operations alike.

  • YaraLiva CalciNit 15.5-0-0 | 50 lb YaraLiva CalciNit 15.5-0-0 | 50 lb
    YaraLiva CalciNit 15.5-0-0 | 50 lb
    Grower Price
    YaraLiva CalciNit 15.5-0-0 | 50 lb
    $37.25
    $56.02 $37.25
    $0.75 lb
    Grower Price
  • MasterBlend 4-18-38 Tomato Formula 25 lb. A closeup view of a small pile of MasterBlend 4-18-38 hydroponic tomato fertilizer powder.
    MasterBlend 4-18-38 Tomato Formula 25 lb.
    Grower Price
    MasterBlend 4-18-38 Tomato Formula 25 lb.
    $48.00
    $72.18 $48.00
    $1.92 lb
    Grower Price
  • MasterBlend 0-12-24 Bloom Formula 25 lb. A closeup view of MasterBlend 0-20-42 Cannabis Bloom, a free flowing non-clumping powder fertilizer.
    MasterBlend 0-20-42 Bloom Formula 25 lb.
    Grower Price
    MasterBlend 0-20-42 Bloom Formula 25 lb.
    $46.59
    $84.25 $46.59
    $1.86 lb
    Grower Price
  • MasterBlend 8-15-36 Lettuce Formula 25 lb water-soluble hydroponic fertilizer bag Masterblend fertilizer container in a greenhouse with rows of lettuce plants
    MasterBlend 8-15-36 Lettuce Formula 25 lb.
    Grower Price
    MasterBlend 8-15-36 Lettuce Formula 25 lb.
    $63.54
    $79.30 $63.54
    $2.54 lb
    Grower Price
  • PureCal 13-0-0 ammonia free calcium nitrate 55 lb. PureCal 13-0-0 Calcium Nitrate | 55 lb Bag
    PureCal 13-0-0 Calcium Nitrate | 55 lb Bag
    Sold out
    PureCal 13-0-0 Calcium Nitrate | 55 lb Bag
    $40.77
    $66.00 $40.77
    $0.74 lb
    Sold out
  • Cannabis Bloom Formula 0-20-42 fertilizer 4lb.
    MasterBlend 0-20-42 Bloom Formula 4 lb.
    Grower Price
    MasterBlend 0-20-42 Bloom Formula 4 lb.
    $20.98
    $25.18 $20.98
    $5.25 lb
    Grower Price
  • Bloom Formula 0-20-42 fertilizer 1 lb.
    MasterBlend 0-20-42 Bloom Formula 1 lb.
    Grower Price
    MasterBlend 0-20-42 Bloom Formula 1 lb.
    $8.52
    $16.99 $8.52
    $8.52 lb
    Grower Price
  • MasterBlend 4-18-38 Tomato Formula 4 lb. white screw-top jar with blue and white label on clean white background A closeup view of a small pile of MasterBlend 4-18-38 hydroponic tomato fertilizer powder.
    MasterBlend 4-18-38 Tomato Formula 4 lb.
    MasterBlend 4-18-38 Tomato Formula 4 lb.
    $15.65
    $0.00 $15.65
    $3.91 lb
  • MasterBlend 9-12-34 Strawberry Formula 25 lb. MasterBlend 9-12-34 Strawberry Formula 25 lb.
    MasterBlend 9-12-34 Strawberry Formula 25 lb.
    Grower Price
    MasterBlend 9-12-34 Strawberry Formula 25 lb.
    $42.23
    $50.88 $42.23
    $1.69 lb
    Grower Price
  • MasterBlend 4-18-38 Tomato Formula 1 lb. white screw-top jar with blue and white label on clean white background A closeup view of a small pile of MasterBlend 4-18-38 hydroponic tomato fertilizer powder.
    MasterBlend 4-18-38 Tomato Formula 1 lb.
    MasterBlend 4-18-38 Tomato Formula 1 lb.
    $6.95
    $0.00 $6.95
    $6.95 lb

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