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Garden Tea Co.

Lime

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Limestone has been used throughout agricultural history for adding fertility to the soil.  Lime helps to neutralize acidic soil conditions, improve soil structure, support beneficial bacteria, and improve the availability of soluble nutrients.  Annual applications of lime to turf / pasture grasses, orchards, vineyards, garden beds and agricultural soil is extremely beneficial to help maintain optimal soil pH for crop production.

Our Hi-Cal Garden Lime is a fine powdered 100% pure limestone derived from the remains of ancient sea beds.  This high calcium agricultural lime will help to raise or sweetens the pH value in acidic soils especially dense clay soils.  Garden Lime helps to balance the availability of other nutrients while also adding the benefit of slowly released calcium.  We recommend using Garde Lime for those needing pH adjustment and additional calcium.

A decrease in soil pH, know as soil acidification, is a natural process that is accelerated by crop production practices, especially the use of nitrogen (N) based fertilizers and heavy tillage.  Acidic soil conditions can also result from the decomposition of organic acids found in plant liter, the leaching of nutrients (calcium, magnesium, potassium and sodium), and an accumulation of toxic elements such as aluminum and sulfur.  Soils with low pH levels, below 5.0, contain higher levels of available aluminum and manganese that can be toxic to plants an may inhibit growth and greatly reduce yields.

For best results have your soil tested to determine the soil texture and the current soil pH. The amount of liming materials needed to adjust your soil pH will vary based upon your soil texture and the current soil pH. For example it requires more lime to raise the pH of clay soil than it will to adjust sandy loam. Use the chart below to determine an initial application of lime. If a soil pH test is not available then half of the amount recommended below should be sufficient for annual pH maintenance.

Application Rates:
  • 5-10 pounds per 100 sq. ft.of garden soil
  • 1/2 cup per cubic foot of potting soil

Pounds of Limestone Needed per 1000 sq. ft. to increase soil pH to 6.5

How to Apply Lime:  When possible, lime should be worked into the top 6 inches of soil to ensure it is incorporated into the root zone of soil. This can be performed when soil is turned / tilled or after an aeration for lawns and turf grasses. For no-till gardener’s lime can be broadcast over the soil surface by hand or with a broadcast seeder. Keep in mind that lime moves very slowly in the soil and can take several years to move down a few inches.

When to Apply Lime:  Lime can be applied at anytime of the year prior to planting crops. Lime is most effective when applied during the late autumn or early winter as limestone takes several months to properly react and correct soil acidity. Applying lime about 4 - 6 months in advance of seeding or transplanting your projected crops will ensure it has time to take effect. Lime can be applied to cold, frozen or dormant soils. Limestone should be broadcast evenly across the soil to ensure consistency. When planting fruiting trees and shrubs (other than acid loving crops which do not require lime) it is best to incorporate lime into the planting site and with the back-fill soil.

Mineral Content
Calcium Carbonate (CaCO3)...... 96.00%
Total Calcium (Ca)........................ 38.00%
Magnesium (Mg)............................. 0.50%
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