Simple Solutions to help you grow your own!
  • SoilKey: Gypsum Rock Dust – 25 pounds


    Gypsum contains calcium, sulfur bound to oxygen and water and can improve overall plant growth and can improve the physical properties of some soils, especially heavy clay soils.  Gypsum can sometimes be especially helpful in areas that were predominately grassland or for adding sulfur due to crop demands.  Sulfur is especially important for quality factors such as sugar content and flavors in food. 

    Gypsum has been shown to increase calcium availability and in some instances lower pH.  This enhances deep rooting and the ability of plants to take up adequate supplies of water and nutrients during drought periods.  Gypsum is moderately soluble in water.  This makes the calcium in gypsum more mobile than the calcium in lime and allows it to more easily move through the soil profile.  Calcium moves very slowly from one plant part to another, and fruits at the end of the transport system get too little.  Calcium must, therefore, be constantly available to the roots.  Additions to soil of a good source of calcium, such as gypsum, can improve the quality of horticultural crops.

    Typically applied at 5-10 pounds per 100 square feet of garden space or 1/2 cup per cubic foot of potting soil.


    Technical Details/Features

    ·       Environmentally friendly, non-toxic

    ·       Improves soil structure and drainage

    ·       Corrects mineral balance in the soil

    ·       Enhances root fertility

    ·       Will not "burn” plants or seedlings

    ·       Raises pH in acidic soils

    ·       Increases phosphorus availability

    ·       Improves the cation exchange capacity

    ·       Provides an excellent source of macro and micro nutrients

    ·       Increases moisture holding properties in the soil



    Mineral Content

    ·       Calcium (Ca) …………………………….….….… 22.00%

    ·       Sulphur (S) …………………………………….….. 17.00%

    Shipping Weight:  25lb

    Dimensions:  10" x 10" x 7"