The Soil Sorcerer’s Langbeinite Kmag Soil Amendment

The Soil Sorcerer’s Langbeinite Kmag (0-0-22)

Potassium-Powered Mineral Magic for Bloom, Root & Fruit Strength

From deep within the Earth, ancient salt deposits yield a crystalline powerhouse of essential plant minerals. The Soil Sorcerer’s Langbeinite Kmag (0-0-22) is a naturally mined, OMRI-listed source of potassium, magnesium, and sulfur—all in one highly soluble, fast-acting form.

Use this triple-action mineral blend to boost fruit quality, improve root development, and unlock vigorous growth in vegetables, herbs, flowers, and flowering trees.

What is Langbeinite?

Langbeinite (pronounced lang-bine-ite) is a unique, naturally occurring mineral salt known chemically as potassium magnesium sulfate (K₂Mg₂(SO₄)₃). Also referred to as K-Mag, it delivers three critical secondary nutrients in a non-chloride form that won’t harm sensitive plants or disrupt beneficial soil microbes.

Benefits of Langbeinite Kmag:

Potassium (22%) – Improves water regulation, boosts flower and fruit production, and strengthens plant immunity

Magnesium (11%) – Essential for chlorophyll production and vibrant green foliage

Sulfur (22%) – Aids in protein synthesis, root vigor, and nutrient uptake

Langbeinite is ideal for soils low in these vital nutrients or areas with heavy rainfall where leaching occurs. Its low salt index makes it safe for use on delicate roots, seedlings, and salt-sensitive crops.

How to Use:

Garden Beds:

Apply 1–2 tablespoons per plant or 1–2 cups per 10 sq. ft.

Mix thoroughly into the top 2–4 inches of soil

Transplants & Perennials:

Use 1 tablespoon per planting hole to promote strong root establishment

 Fruit Trees, Vines, and Flowering Shrubs:

Sprinkle ½–1 cup around the drip line, scratch into soil, and water well

Potted Plants & Containers:

Add ½–1 teaspoon per gallon of soil

Best applied during mid to late vegetative stage or early flowering for best results.

Product Details:

Guaranteed Analysis:
Potassium (K₂O): 22%
Magnesium (Mg): 11%
Sulfur (S): 22%

Derived From: Naturally mined langbeinite

Texture: Fine granular crystal

Water Solubility: Moderate to high

Chloride Free: Safe for all soil life and salt-sensitive plants

Available Sizes:

1 lb Bag – For pots, starts, and top-dressing

5 lb Bag – Ideal for raised beds and gardens

10 lb Bag – Perfect for vegetable rows and perennials

15 lb Bag – Designed for orchards, greenhouses, and bulk amenders