• All our products are manufactured in California, USA
• Tested by independent third-party laboratories for quality assurance
• Registered with the California Department of Food and Agriculture (CDFA)
• Rigorously tested to ensure products are free from heavy metals

If you're not completely satisfied, we offer a 90-day money-back guarantee. Simply return the unused portion in its original packaging, and we'll process a full refund.

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• Biodegradable packaging
• Precise nutrient formulation to reduce runoff
• Support for eco-friendly farming methods

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K-Mag (Sulfate of Potash Magnesia) is a naturally occurring mineral fertilizer containing 22% potassium (K₂O), 11% magnesium (MgO), and 22% sulfur (S). Its unique triple-nutrient formula makes it exceptional for situations requiring potassium without nitrogen, particularly during fruit development and ripening stages. The low chlorine content (less than 2.5%) makes it safe for chlorine-sensitive crops like tobacco, potatoes, tomatoes, and berries. Unlike muriate of potash, K-Mag won't cause salt burn or chloride toxicity, making it ideal for high-value crops.

Choose K-Mag over other potassium sources when:

• Growing chlorine-sensitive crops: Tobacco, potatoes, tomatoes, peppers, berries
• Magnesium is also needed: Saves an additional application and ensures balanced nutrition
• Late-season fertilization: When nitrogen isn't desired but K is needed for fruit quality
• Sandy or acidic soils: These often lack both magnesium and sulfur
• Quality over quantity: K-Mag improves fruit color, flavor, and storage quality
• Preventing grass tetany: In pastures where Mg is crucial for livestock health

K-Mag enhances crops through multiple mechanisms:

• Potassium (22%): Regulates water uptake, improves drought tolerance, enhances fruit size/quality, and strengthens disease resistance
• Magnesium (11%): Central component of chlorophyll, essential for photosynthesis, improves phosphorus utilization, and prevents interveinal chlorosis
• Sulfur (22%): Required for protein synthesis, enhances nitrogen efficiency, improves crop flavor/aroma, and increases vitamin content
• Synergistic effects: The three nutrients work together to improve overall plant metabolism and stress tolerance

Research shows K-Mag can increase potato yields by 10-15% while reducing internal brown spot and improving storage quality.

Look for these deficiency symptoms:

• Potassium deficiency: Yellowing/browning of leaf edges (marginal chlorosis), weak stems, poor fruit quality, increased disease susceptibility
• Magnesium deficiency: Interveinal chlorosis (yellowing between green veins) on older leaves first, reduced photosynthesis, poor fruit set
• Sulfur deficiency: Uniform yellowing of young leaves (unlike N deficiency which affects old leaves), stunted growth, delayed maturity
• Combined symptoms: Poor fruit color/flavor, reduced shelf life, lower crop quality despite adequate yields

Soil tests showing K below 150 ppm, Mg below 50 ppm, or S below 10 ppm typically indicate K-Mag application would be beneficial.

Yes, K-Mag is compatible with most fertilizers, but follow these guidelines:

• Compatible with: Urea, ammonium sulfate, DAP, MAP, and most micronutrients
• Avoid mixing with: Calcium nitrate or high-calcium fertilizers (may cause precipitation)
• Best practices: When tank mixing, add K-Mag to water first, agitate well, then add other products
• Application timing: Can be applied with nitrogen early season or alone late season
• Soil pH consideration: K-Mag has minimal effect on soil pH, making it suitable for all soil types

For fertigation systems, K-Mag's complete solubility ensures no clogging of drip lines or sprinklers.