• Wear chemical-resistant gloves when handling bulk quantities or preparing liquid solutions
• Wear safety glasses or goggles — fine dust can cause eye irritation
• Use a dust mask (N95 or better) when working with dry product in enclosed spaces or windy conditions
• Wear long sleeves and closed-toe shoes to minimize skin exposure
• Wash hands and exposed skin thoroughly with soap and water after handling

• Store in a cool, dry, well-ventilated area in the original sealed container
• Potassium chloride is highly hygroscopic — moisture causes caking; reseal bags promptly after use
• Keep away from direct sunlight and heat sources above 104°F (40°C)
• Store away from incompatible materials including strong oxidizers and concentrated acids
• Keep out of reach of children and pets

• High salt index (116) — avoid direct seed contact and keep away from plant stems and crowns
• Do not apply to dry foliage or during high heat (above 85°F) to prevent foliar burn
• Do not mix concentrated KCl stock solution directly with calcium nitrate — dilute separately and combine in the main tank
• In fertigation systems, flush lines after injection to prevent salt buildup in emitters
• Do not apply to waterways, drainage ditches, or areas where runoff could enter aquatic systems
• Avoid applying immediately before heavy rainfall to prevent nutrient loss through leaching on sandy soils

• Eye contact: Flush with clean water for at least 15 minutes, lifting eyelids periodically. Seek medical attention if irritation persists.
• Skin contact: Wash affected area thoroughly with soap and water. Remove contaminated clothing.
• Ingestion: Do not induce vomiting. Rinse mouth with water. Contact Poison Control (1-800-222-1222) or seek medical attention immediately.
• Inhalation: Move to fresh air immediately. Seek medical attention if coughing, shortness of breath, or irritation persists.

Refer to the Safety Data Sheet (SDS) for complete safety information.

Potassium chloride (KCl) is the most concentrated and widely used potassium fertilizer in the world, containing 62% K₂O. Its key distinction from other potassium sources is that it contains approximately 47% chloride alongside potassium. Potassium sulfate (0-0-53) supplies potassium with sulfur and no chloride — preferred for chloride-sensitive crops. K-Mag (0-0-22) supplies potassium, magnesium, and sulfur without chloride. Muriate of potash is the lowest-cost option per unit of K₂O, making it the dominant choice for chloride-tolerant field crops on large acreage.

Crops that are sensitive to elevated chloride levels include tobacco (chloride reduces leaf quality), potatoes (can lower specific gravity and cause internal blackening), strawberries and raspberries (reduces sugar content), grapes (affects wine quality), tomatoes and peppers (quality and flavor impacts), citrus (leaf burn risk), and ornamentals like azaleas and rhododendrons. For any of these crops, use Potassium Sulfate 0-0-53 or K-Mag 0-0-22 as chloride-free alternatives. When in doubt, a soil chloride test can help determine whether chloride accumulation is already a concern.

Potassium is involved in more plant physiological processes than any other mineral nutrient except nitrogen. It activates over 80 plant enzymes, regulates stomatal opening and closing (which controls water use and CO₂ intake), drives sugar loading into the phloem for transport to fruits and roots, and strengthens cell walls against disease and physical stress. Potassium deficiency typically shows as scorching or browning along leaf margins, reduced fruit size, and increased susceptibility to drought and disease. For a deeper look at potassium's role in plant health, see our article: What is the Function of Potassium (K) in Plants?

Yes, but with an important precaution: never mix concentrated KCl stock solution directly with concentrated calcium nitrate stock solution — the combination can form a precipitate. Always dilute each product separately into a large volume of water (or prepare separate stock tanks), then combine the diluted solutions in your main fertigation tank. At working concentrations (2–3 lbs KCl per 100 gallons), the two are compatible and widely used together in greenhouse and drip irrigation programs.

Chloride is actually an essential plant micronutrient — required in small amounts for the water-splitting step in photosynthesis and for osmotic regulation. In grain crops like wheat and barley, chloride has been shown in research to suppress common root rot, take-all disease, and strip rust, often improving yields beyond what potassium alone would provide. The concern with chloride arises with sensitive crops or when chloride accumulates in soil through repeated high-rate KCl applications without adequate leaching. Sandy, high-rainfall soils rarely develop chloride problems; heavier soils with limited drainage or irrigation water already high in chloride deserve more attention. For more on how potassium and manganese interact in plant nutrition, see: What is the Role of Manganese and Potassium?

Potassium chloride has a salt index of approximately 116 (relative to sodium nitrate = 100), which is the highest of any common potassium fertilizer. A high salt index means the product creates more osmotic pressure in the soil solution per unit weight, which can slow germination, reduce root growth, and cause foliar burn if applied at excessive rates or in direct contact with seeds, seedling roots, or foliage. Practical management: avoid seed-zone contact, split high rates into multiple applications, water in thoroughly after broadcast application, and use lower foliar concentrations (1–2 tbsp/gallon maximum).

Muriate of potash (62% K₂O) typically costs 40–50% less per unit of K₂O than potassium sulfate (53% K₂O). For chloride-tolerant crops where sulfur is not needed, KCl is the clear economic choice. Potassium sulfate is preferred when: the crop is chloride-sensitive, the soil is already high in chloride, sulfur is needed alongside potassium, or product quality is a primary concern (sugar crops, premium vegetables, tobacco). If you're managing a mixed operation with both tolerant and sensitive crops, keeping both products on hand is often the most flexible approach.

• CDFA registered — complies with California Department of Food and Agriculture fertilizer regulations
• Independently lab tested for heavy metal content to ensure product purity
• Agricultural-grade crystalline KCl sourced for consistent solubility and verified K₂O content
• Packaged and distributed from our Madera, California facility

If you're not completely satisfied with your purchase, return the unused portion in its original packaging within 90 days for a full refund. No complicated forms — contact us at questions@greenwaybiotech.com and we'll take care of you.

• Precision formulation helps growers apply the right amount — reducing excess potassium runoff into waterways
• Concentrated formula (62% K₂O) means less packaging and transportation per unit of nutrient delivered
• We are committed to providing agronomically sound recommendations that support sustainable soil health over time

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