What does Gypsum do? It’s main purpose is to penetrate the many clay particles in heavy or the layer of hard subsoil type soils and loosen the soil structure. Then this creates air and moisture slots that will loosen and break-up the soil structure.
Be aware that gypsum does not contain any major plant nutrients, so continue a regular fertilizing program even though it contains calcium and sulfur which is needed for plant growth. In addition, continue to put out organic humus as you plant.
Gypsum is easy to apply!
Just spread it on the lawn, using the granular type, with a lawn spreader at the rate of 40 pounds per thousand square feet. Gypsum fertilizer can be spread any time of the year and only one application per year is needed. To get it started working, water immediately after applying. If applied properly it does not affect the pH of the soil, not harmful to humans and your animals and will not burn. And because Gypsum is neutral and will not change the soil pH, you can use it in places where plants like Azaleas, Camellias, Rhododendrons and other acid loving plants grow, they need a little calcium too. Of course, gypsum should be applied per directions.
What is gypsum?
Hydrous calcium sulfate
Calcium Sulfate – CaSO4
Another Name: Gypsite
