McKenzie Rock Flour - Glacial Rock Dust 6lbs

McKenzie Rock Flour - Glacial Rock Dust 6lbs

McKenzie Rock Flour is a finely milled glacial rock dust made from basalt and andesite deposits from Oregon's Cascade Mountains. It supplies naturally occurring calcium, magnesium, iron, and trace minerals as a long-term mineral soil amendment.

Guaranteed Analysis

• Calcium (Ca): 1.00%
• Magnesium (Mg): 1.00%
• Iron (Fe): 3.00%

How to Use

Use the current package directions to select a rate for garden beds, fruit trees, perennials, lawns, or compost blends. Distribute the fine powder evenly, incorporate it where practical, control dust during handling, and avoid applying more than the label recommends. Mineral release and plant response depend on soil chemistry, biology, moisture, and particle size, so use this amendment as part of a soil-test-based fertility plan rather than as a substitute for complete crop nutrition.

Read our guide to using rock dust fertilizers, or compare additional nutrient-specific fertilizers and soil amendments.