Horticulture growers of fruits, vegetables and ornamentals along with professional turf and landscape managers have long used gypsum to improve soil structure resulting in better growth, yields, quality, nutritional value and resistance to insects, diseases, and environmental stresses Gypsum Is a Fertilizer, soil amendment and conditioner providing calcium and plant available sulfur in sulfate form without increasing pH. Gypsum can be spread on the surface and does not need to be incorporated since it is very soluble.
Reasons to use gypsum:
Pulverized Organic Gypsum
It is recommended that you conduct a soil analysis to ensure lawn and garden gypsum will benefit you. If no soil test is available apply as follows:
Established Lawns: Use 10 lbs. of gypsum per 150 square feet in the spring and in the fall. At these times of year, you can take advantage of seasonal moisture essential for the desired conditioning of the soil.
New Lawns: Use 10 lbs. of gypsum per 100 square feet, incorporating into the soil. Water thoroughly before seeding.
Vegetables: Spade in 10 lbs. of gypsum for every 80 square feet. Mix well with soil.
For Roses & Flowers: Spade in 1/2 lb. of gypsum per plant and mix well with soil. Soak area with water.
Trees: Use 2–3 lbs. of gypsum per tree.
Shrubs: Use 1–2 lbs. of gypsum per shrub. Plant shrubs the day they are purchased. Make the hole twice the diameter needed.
In the late fall, apply generous quantities of gypsum to the soil around the base of trees and shrubs to stimulate root growth. This also helps to control insects that hibernate in the soil over the winter.
Winter de-icing salt is toxic to most plants and grasses when it accumulates to certain levels. Use 1/2 lb. of gypsum per square foot to restore soil that has absorbed salt.
For all uses, when possible mix gypsum into the soil and water until gypsum dissolves.
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