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We're clearing out the potting shed! Check out our SALE section 🍁💸
We're clearing out the potting shed! Check out our SALE section 🍁💸

Soil Amendments

Mixed and single-source macro and micro-nutrients.
    Original price $46.75 - Original price $46.75
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    Current price $46.75

    Potassium Sulfate Granular (SOP) (0-0-50+S17%) - 50 lb Bag

    Potassium is essential for a vigorous root system, plant growth, disease resistance, as well as fruit and vegetable quality. SOP granular is a natu...

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    Original price $46.75 - Original price $46.75
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    $46.75
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    Current price $46.75
    Original price $308.50 - Original price $308.50
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    Current price $308.50

    AgSil 16H Potassium Silicate Powder 52% SiO2 (0-0-32) 50 lb Bag

     AgSil helps plants to resist toxicity from phosphorous, manganese, aluminum and iron and increases tolerance to salt. AgSil also aids in resistanc...

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    Original price $308.50 - Original price $308.50
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    Original price $56.50 - Original price $56.50
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    Current price $56.50

    Allganic Soluble Potassium Sulfate SOP (0-0-52+S18%) - 50 lb Bag

    Potassium Sulfate Allganic Brand Water Soluble SOP (0-0-52-Sulfur 18%) is a soluble SOP for crop production. Apply according to your soil test, y...

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    Original price $56.50 - Original price $56.50
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    Original price $41.75 - Original price $41.75
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    $41.75
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    Current price $41.75

    Kmag or SulPoMag Granular (0-0-22+22S+11Mg) - 50 lb Bag

    Intrepid Trio brand Kmag or SulPoMag is 100% natural Langbeinite, a long-lasting, readily available source of low-chloride potassium (22%), magnesi...

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    Original price $41.75 - Original price $41.75
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    Original price $50.95 - Original price $50.95
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    $50.95
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    Current price $50.95

    K*ASH - Sunflower Hull Ash (0-4-34) - 50 lb Bag

    K*Ash enriches the soil, tempers acidity, and improves soil structure and microbial flora while providing potassium and other essential nutrients. ...

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    Original price $50.95 - Original price $50.95
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    Original price $60.50 - Original price $60.50
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    $60.50
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    Current price $60.50

    BioLink® Potassium Fertilizer Liquid (0-0-6) - 2.5 Gallon

    BioLink Potassium Fertilizer (0-0-6) is a liquid fertilizer containing 6.0% soluble potash derived from sulfate of potash (potassium sulfate). It c...

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    Original price $60.50 - Original price $60.50
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    Original price $471.95 - Original price $471.95
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    $471.95
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    Current price $471.95

    Maxicrop Soluble Seaweed Powder (0-0-17) - 44 lbs

    Concentrated Ascophyllum nodosum (brown seaweed) plus potassium hydroxide from the Norwegian coastline. This highly soluble seaweed provides trace ...

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    Original price $471.95 - Original price $471.95
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    Original price $14.95
    Original price $14.95 - Original price $14.95
    Original price $14.95
    Current price $12.50
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    Current price $12.50

    DTE Langbeinite - K-Mag (0-0-22) - 5 lb Box

    Down To Earth’s Langbeinite 0-0-22 is a naturally mined crystalline mineral that supplies the water-soluble sulfate form of three vital plant nutri...

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    Original price $14.95
    Original price $14.95 - Original price $14.95
    Original price $14.95
    Current price $12.50
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    Current price $12.50
    Sale Sale
    Original price $263.90 - Original price $263.90
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    $263.90
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    Current price $263.90

    K-Mate SG (0-0-12) - 50lb Bag

    K-Mate SG is a highly concentrated (99%) organic humic acid product that is designed to be dissolved into water to make your own liquid potassium h...

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    Original price $263.90 - Original price $263.90
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    Current price $263.90
    Sold out
    Original price $1,789.00 - Original price $1,789.00
    Original price
    $1,789.00
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    Current price $1,789.00

    Potassium Sulfate Granular (SOP) (0-0-50+S17%) - 2200lb Tote

    Potassium is essential for a vigorous root system, plant growth, disease resistance, as well as fruit and vegetable quality. SOP granular is a natu...

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    Original price $1,789.00 - Original price $1,789.00
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    Current price $1,789.00
    Original price $22.00
    Original price $22.00 - Original price $22.00
    Original price $22.00
    Current price $17.50
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    DTE Solution Grade Potassium Sulfate (0-0-50) - 5 lb

    Potassium Sulfate contains potassium (K) and sulfur (S) – two of the essential nutrients that plants require to achieve optimum growth and reach th...

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    Original price $22.00
    Original price $22.00 - Original price $22.00
    Original price $22.00
    Current price $17.50
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    Current price $17.50
    Sale Sale
    Original price $22.00
    Original price $22.00 - Original price $22.00
    Original price $22.00
    Current price $17.50
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    Current price $17.50

    DTE Solution Grade Langbeinite (0-0-21.5) - 5 lb

    Langbeinite (AKA KMag, or SulPoMag) is a mineral that contains potassium (K), magnesium (Mg) and sulfur (S) – three of the essential nutrients that...

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    Original price $22.00
    Original price $22.00 - Original price $22.00
    Original price $22.00
    Current price $17.50
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    Current price $17.50
    Sale Sale
    Original price $44.00 - Original price $44.00
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    $44.00
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    Current price $44.00

    Diamond K Solution Grade Ultra Fines SOP (0-0-50) - 50 lb Bag

    Diamond K Ultra Fines Sulfate of Potash is a high-purity, finely ground (minus 325 mesh) soluble potassium sulfate designed to be applied in soluti...

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    Original price $44.00 - Original price $44.00
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    Current price $44.00
    Original price $289.50 - Original price $289.50
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    $289.50
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    Current price $289.50

    Grower's Secret Seaweed Powder Soluble (0-0-16) - 50 lb Bag

    High-quality soluble seaweed (Ascophyllum nodosum) for use in foliar sprays or irrigation water. Improves crop quality by promoting chlorophyll co...

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    Original price $289.50 - Original price $289.50
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    Original price $32.95 - Original price $32.95
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    $32.95
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    Current price $32.95

    MilAgro Keylamax Potassium (4-0-40) - 2 lb Bag

    Foliar powder fertilizer derived from potassium amino acid complexes. 4% N, 40% K2O. It improves the quality of the harvest, the color, flavor, w...

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    Original price $32.95 - Original price $32.95
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    $32.95
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    Original price $44.00 - Original price $44.00
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    Current price $44.00

    Diamond K KMS (0-0-21.5) - 50 lb Bag

    Also known as Langbeinite, Kmag, SulPoMag and Trio. Contains potassium (K), magnesium (Mg) and sulfur (S) – three of the essential nutrients that p...

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    Original price $44.00 - Original price $44.00
    Original price
    $44.00
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    Current price $44.00