Should I Use The Granite Fine Dust From Granite Tiles For My Gardens?

Question

Is there any benefit to using the extremely fine granite dust left over from cutting Granite tiles? I understand there is nutrients in granite for plants, but how long would that take to break down? how much would one need to make any difference? and would it be better for food plants, shrubs, trees or flowering plants? This dust/powder is almost as fine as icing sugar.

Answer 1

Hello!

Granite powder, commonly known as rock dust, serves as a beneficial soil amendment by providing essential minerals, improving soil structure, and balancing pH. When adding granite powder to soil, moderation is key. A recommended application rate is typically around 10 to 20 pounds per 100 square feet, ensuring an even distribution. This measured approach maximizes the positive impact on soil fertility and structure without risking nutrient imbalances.

Answer 2

I meant to ask say Marble tile. Can I assume the benefits are about the same?

Also what would gain the most benefit: flowers, shrubs/trees. or food?

Answer 3

That will have completely different results, unfortunately. That will drastically raise the alkalinity of the soil, and will cause problems for your existing bed. I would not use it.