PowerGrow Systems Langbeinite (K-MAG) All Natural Fertilizer 0-0-22 is a naturally mined, All Natural mineral fertilizer that delivers three critical plant nutrients in a single application — potassium, magnesium, and sulfur — all in plant-ready, water-soluble sulfate form. No fillers, no chlorine, no guesswork.

What Is Langbeinite (K-MAG)?

Langbeinite is a naturally occurring crystalline mineral mined from ancient seabed deposits. Because it supplies potassium, magnesium, and sulfur without the chlorine found in conventional potash (muriate of potash), it's the go-to choice for growers raising sensitive vegetables, fruits, and high-value crops. Its neutral pH won't alter soil chemistry, and its low chlorine content (under 3%) virtually eliminates the risk of fertilizer burn.

Why Your Plants Need All Three Nutrients

• Potassium (22%) — Regulates water uptake, strengthens cell walls, improves fruit quality and disease resistance, and supports root development
• Magnesium (11%) — Central atom of chlorophyll; essential for photosynthesis, enzyme activation, and nutrient absorption
• Sulfur (22%) — Drives protein synthesis, improves nitrogen efficiency, and enhances flavor in alliums, brassicas, and fruit crops

Ideal For

Tomatoes, peppers, garlic, onions, blueberries, grapes, potatoes, leafy greens, cannabis, and any crop sensitive to chlorine or high salt index fertilizers. Also excellent as a magnesium correction in soils showing yellowing between leaf veins.

Why PowerGrow Systems

• All Natural for organic Use
• No-Burn Formula — low chlorine content (under 3%) and neutral pH protect sensitive plants
• Available in 5 lb, 10 lb, and 20 lb — right for home gardeners and commercial growers alike
• Water-Soluble Sulfate Form — nutrients are immediately available to plant roots

Application Guidelines

Broadcast and work into soil before planting, or side-dress during the growing season. For vegetables and fruits: apply 1–2 lbs per 100 sq ft. Always water in after application. Soil testing recommended for precision application rates.

NPK: 0-0-22 | Potassium: 22% | Magnesium: 11% | Sulfur: 22% | Chlorine: <3%