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Basalt Rock Dust Soil Amendment

4.8 out of 5 Read 12 reviews
$ 3600
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Basalt rock dust for soil fertility

Cascade Minerals Basalt stimulates soil microbes, helps build humus, neutralizes pH and increases phosphorus uptake. 100% natural, with no fillers.

Key things we want you to know

  • Compost: 2 cups per cubic foot.
  • Gardens and flowers: 10 lb per 100 sq ft tilled in, then 5 lb as a top dress.
  • Trees and shrubs: 1 cup per inch of trunk diameter.
  • Minerals: a good source of iron, calcium, magnesium and manganese.

Ingredients

  • Calcium (Ca): 1%
  • Magnesium (Mg): 0.5% (0.01% water soluble)
  • Iron (Fe): 4%
  • Manganese (Mn): 0.05% (0.001% water soluble)

Application & Mixing

More information is available from Cascade Minerals (opens in new tab).

  • Compost: Mix 2 cups per cubic foot.
  • Trees & Shrubs: Use 1 cup per 1 inch of trunk diameter. Spread evenly across the rooting area, rake or lightly till into the soil if possible, and water in thoroughly.
  • Vegetable Gardens & Flowers: Use 10 lb per 100 sq ft and till in at planting. Use 5 lb per 100 sq ft as a top dress during the growing season, lightly raked in and watered thoroughly.
  • Container Plants: Use 1 cup per cubic foot of potting soil, mixed in before planting. For surface application, use 1 teaspoon per inch of pot diameter, stirred lightly into the top of the soil and watered thoroughly.

Lab Reports & Resources

Reviews (12)

Customer Reviews

Based on 12 reviews
83%
(10)
8%
(1)
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K
Kasa

Came bagged and in good condition. Outside of the bag was a little wet but still good to use came sealed.

r
robert a
perfect

perfect, ground finely so that the nutrients were more available to the plants.

E
Euna

Received timely manner, hoping it will help here on my farm bushes, and plants, thank you!

J
Joshua

Solid shipping! When an almost 50lb bag of rock dust makes it from Washington to NY without spilling a grain you know your in good hands! Cascade minerals Basalt is top notch, and so is Kis organics!

T
Tim Long
It showed up

USPS tried to make life a little more interesting