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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 $101.50 - Original price $101.50
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    Current price $101.50

    Thorvin Kelp - 50 lb Bag

    Thorvin Kelp is a single sourced kelp from Icelandic waters and is certified organic and OMRI-listed. The kelp is processed at a low temperature in...

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    Original price $101.50 - Original price $101.50
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    $101.50
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    Current price $101.50
    Original price $27.90 - Original price $27.90
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    Current price $27.90

    Elemental Sulfur 90% - 50 lb Bag

    Pelletized sulfur is used to correct sulfur deficiencies or lower soil pH. Excellent for blueberries and all acid-loving plants. Rates vary by star...

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    Original price $27.90 - Original price $27.90
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    Original price $27.20 - Original price $27.20
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    Magnesium Sulfate (Epsom Salt) - Technical Grade - 50 lb Bag (Agriculture)

    Magnesium Sulfate (Epsom Salt) Technical Grade - Mg 9.8%, S 12.9%. Quick acting magnesium & sulfur fertilizer. It can be used for a soil or fol...

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    Original price $27.20 - Original price $27.20
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    Original price $89.50 - Original price $89.50
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    $89.50
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    Current price $89.50

    Nature's Kelp from Thorvin - 50 lb Bag

    Nature’s Kelp from Thorvin is a certified organic dried kelp (Ascophyllum Nodosum) from the North Atlantic that is a rich source of trace minerals....

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    Original price $89.50 - Original price $89.50
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    Original price $28.40 - Original price $28.40
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    Azomite Micronized Powder - 44 lb Bag

    Azomite is a naturally mined, volcanic mineral with over 66 minerals and trace elements that are important for plant nutrition and growth. It impro...

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    Original price $28.40 - Original price $28.40
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    Original price $28.40 - Original price $28.40
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    Azomite Granular - 44 lb Bag

    Azomite is a naturally mined, volcanic mineral with over 66 minerals and trace elements that are important for plant nutrition and growth. It impro...

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    Original price $28.40 - Original price $28.40
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    Original price $308.50 - Original price $308.50
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    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 $29.50 - Original price $29.50
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    Sea-90 Soil Mineralizer+ - 50 lb Bag

    Sea-90 Soil Mineralizer+ now includes 1% Humic Acid as well as 0.1% K2O, 1.5% Ca, 0.5% Mg and 1% S. Sea-90 is natural salt crystals produced by so...

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    Original price $29.50 - Original price $29.50
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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 $36.00 - Original price $36.00
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    Iron Sulfate Powder 20% - 50 lb Bag

    Ferrous (Iron) Sulfate Heptahydrate is a soluble product that can be broadcast, side banded or foliar sprayed. Guaranteed Analysis: 18% Sulfur, 20%...

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    Original price $36.00 - Original price $36.00
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    Original price $12.50 - Original price $12.50
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    Copper Sulfate Powder - 1 lb

    Copper sulfate powder is a composed of 25.2% copper and 12.5% sulfur. It provides a water soluble, readily available form of copper, an essential m...

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    Original price $12.50 - Original price $12.50
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    Original price $9.75
    Original price $9.75 - Original price $9.75
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    Current price $7.00
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    True Organic Prilled Sulfur 99% - 5 lb Bag

    Prilled elemental sulfur is used to correct sulfur deficiencies or lower soil pH.  Our elemental sulfur will have a light green color. Excellent fo...

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    Original price $9.75
    Original price $9.75 - Original price $9.75
    Original price $9.75
    Current price $7.00
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    Sale Sale
    Original price $126.90 - Original price $126.90
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    $126.90
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    Current price $126.90

    Copper Sulfate Powder - 50 lb Bag

    Copper sulfate powder is a composed of 25.2% copper and 12.5% sulfur. It provides a water soluble, readily available form of copper, an essential m...

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    Original price $126.90 - Original price $126.90
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    Original price $86.30 - Original price $86.30
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    $86.30
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    Zinc Sulfate Powder, Ag & Livestock- 50 lb Bag

    Zinc sulfate monohydrate powder is fertilizer and feed grade. Guaranteed Analysis: Water Soluble Zinc (Zn) 35.5%, Sulfur (S) 17%. Zinc sulfate powd...

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    Original price $86.30 - Original price $86.30
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    $86.30
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    Original price $12.50 - Original price $12.50
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    Zinc Sulfate Powder, Ag & Livestock, 1 lb Bag

    Zinc sulfate monohydrate powder is fertilizer and feed grade. Guaranteed Analysis: Water Soluble Zinc (Zn) 35.5%, Sulfur (S) 17%. Zinc sulfate powd...

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    Original price $12.50 - Original price $12.50
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    Original price $101.50 - Original price $101.50
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    Solubor 20.5% Boron (Sodium Borate) - 50 lb Bag

    Solubor has the highest concentration of boron (20.5%) and the maximum possible dispersion and solubility in water and other solutions even at lowe...

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    Original price $101.50 - Original price $101.50
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    $101.50
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    Original price $12.50 - Original price $12.50
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    Manganese Sulfate Powder 31.5% - 1 lb Bag

    Manganese Sulfate with 31.5% manganese and 18% sulfur is used for soils deficient in manganese (Mn). Manganese Sulfate Powder is soluble and can be...

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    Original price $12.50 - Original price $12.50
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    Original price $17.95
    Original price $17.95 - Original price $17.95
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    Current price $13.95
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    Maxicrop Soluble Seaweed Powder (0-0-17) - 10.7 oz

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

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    Original price $17.95
    Original price $17.95 - Original price $17.95
    Original price $17.95
    Current price $13.95
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    Sale Sale
    Original price $29.50 - Original price $29.50
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    Current price $29.50

    Sea-90 Foliar Mineralizer - 50 lb Bag

    Sea-90 Foliar Mineralizer now includes 0.1% K2O, 1% Ca, and 0.5% Mg. Sea-90 is made from natural salt crystals produced by solar dehydrating sea wa...

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    Original price $29.50 - Original price $29.50
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    Original price $24.75 - Original price $24.75
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    Vansil W-20 Wollastonite (Ca₂O₄Si) - 50 lb Bag

    Wollastonite is a natural calcium silicate mineral. VANSIL wollastonite is sourced domestically and is not chemically treated. Because it is milled...

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    Original price $24.75 - Original price $24.75
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    Original price $25.80 - Original price $25.80
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    $25.80
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    Current price $25.80

    Biomin® Liquid Copper (1-0-0-4%CU)- Gallon

    Biomin Liquid Copper is an amino acid chelated copper for preventing and correcting copper deficiences. It is completely bioavailable and can be ap...

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    Original price $25.80 - Original price $25.80
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    Original price $25.80 - Original price $25.80
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    Biomin® Liquid Calcium 5% - 1 Gallon

    Biomin Liquid Calcium is an amino acid chelated fertilizer containing 5% calcium derived from calcium carbonate (limestone). It is completely bioav...

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    Original price $25.80 - Original price $25.80
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    Original price $36.00 - Original price $36.00
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    Boron 10% Granular - 50 lb Bag

    Boron 10 % Cameron Chemicals Brand is pelletized and is derived from ulexite (sodium calcium borate). Use it as part of a fertility plan, broadcast...

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    Original price $36.00 - Original price $36.00
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    Original price $102.00 - Original price $102.00
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    $102.00
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    Current price $102.00

    Manganese Sulfate Powder 32% (For Feed or Fertilizer) - 55 lb Bag

    Manganese Sulfate with 18% sulfur. For soils deficient in Manganese (Mn), apply this fast-acting source of 32% Mn to the soil. Can be applied by br...

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    Original price $102.00 - Original price $102.00
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    $102.00
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    Current price $102.00