Ingredients
Modern farming and intensive gardening strip minerals from the soil over time. Plants need more than just N, P, and K — they require dozens of trace elements that determine the quality, flavor, and nutritional density of everything you grow.
Glacial rock dust is finely ground stone — usually granite or basalt — that was pulverized by glacial activity thousands of years ago. This grinding creates an enormous surface area that releases minerals slowly into the soil as microbes break it down.
A quality glacial rock dust contains:
When you remineralize depleted soil, you’re essentially rebuilding the mineral bank that plants draw from. Many gardeners report noticeably improved flavor in vegetables, deeper colors in flowers, and better disease resistance after amending with rock dust.
Glacial rock dust is a key ingredient in both Daley’s Mix and Premium Soil Mix — our two premium growing media. It works synergistically with the mycorrhizal fungi and soil bacteria in our blends, which solubilize the minerals over time, making them available to plant roots in exactly the form they need.
For the full breakdown of what’s in our mixes, see our Ingredient Library. Ready to order? Schedule a bulk pickup at our Grants Pass location.
Common Questions
Glacial rock dust contains over 60 trace minerals including calcium and magnesium as secondary macronutrients, plus iron, manganese, zinc, copper, and boron as micronutrients. It also provides silica for cell wall strength and dozens of ultra-trace elements that influence plant immunity and flavor.
Glacial rock dust is a long-term amendment that releases minerals slowly over one full growing season and beyond. The effects build over time as soil microbes break down the finely ground stone. Gardeners typically notice improved flavor, deeper colors, and better disease resistance after the first season of application.
Work glacial rock dust into your soil before planting or top dress established beds. It integrates into both Daley's Mix and Premium Soil Mix as a long-game ingredient. For best results, pair it with mycorrhizal fungi and soil bacteria that solubilize the minerals over time, making them available to plant roots.
Plants evolved to require dozens of trace elements that determine quality, flavor, and nutritional density. Modern farming strips these minerals from soil over time. Glacial rock dust rebuilds this mineral bank, and gardeners commonly report noticeably improved flavor in vegetables and deeper colors in flowers after remineralizing depleted soil.
Want the full science behind every ingredient?
Our ingredient library covers all 26 amendments with full descriptions and product cross-references.
