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Glacial Rock Dust

Frankia Glacial Rock Dust remineralizes your soil, ensuring your soil has sufficient micronutrients and trace elements to support a healthy soil food web. Rock and mineral deposits transported and ground by glaciers during the last ice age were deposited in moraines, where Frankia Glacial Rock Dust is collected from. Contains Potassium, Calcium, Magnesium, Iron, Manganese, and a broad spectrum of other elements. Frankia Glacial Rock Dust is screened to a fine particle size to maximize surface area and availability to plants and soil microbes. Glacial Rock Dust can be added directly to compost piles as a microbial enhancer. Glacial Rock Dust will not burn your plants.

What is it and where is it from?

Glacial Rock Dust is derived from pulverized and screened glacial moraines in British Columbia. A variety of glacial moraines were sampled until we found one with the combination of nutrients and low heavy metals we were looking for.

INGREDIENTS: glacial moraine


SKU: N/A Category:
Guaranteed analysis

Soluble Potash K2O: 2.0%

Calcium (Ca): 2.5%

Magnesium (Mg): 0.7%

Iron (Fe): 3.0%

Manganese (Mn): 0.5%

Copper (Cu): 0.005%


Canada’s Organic Production Systems Permitted Substances List (CAN/CGSB 32.311-2015) states that “Mined minerals shall not have undergone any change in its molecular structure through heating or combining with other substances and shall not be processed or fortified with synthetic chemicals”.

Frankia Glacial Rock Dust is pure and unaltered glacial moraine powder with no additives or synthetic processing agents and is acceptable for use in certified organic agriculture in Canada.


Gently mix into top 5cm (2”) of soil.

In the garden: Up to 22.7kg per 20m2 (50lbs per 200ft2). Apply annually.

Top dressing: 60-120ml (1/4-1/2 cup) per plant, or 15-30ml per 4L (1-2tbsp per gal) of soil, annually.

Pasture and field crops: 100lbs per acre / 115kg per hectare annually, higher applications may be appropriate depending on soil condition. Glacial Rock Dust will not burn plants.

Premixing soil: 60-90ml per 4L (1/4-3/8 cup per gal) of soil. For larger volume soil mixing add up to 10kg (22lbs) per cubic yard of soil.

Weight to volume conversion: Glacial Rock Dust has a specific gravity of approximately 1.08.

Volume Weight (g)
Tablespoon (15ml) 16
Cup (236ml) 255
Litre 1080