Gypsum is a natural clay breaker that helps to drastically improve and condition heavy clay soils; breaking down the clay into a workable and crumbly form. This allows water to penetrate through the clay soil, helping the roots of plants and turf to move freely and absorb the essential nutrients needed to survive. A high calcium content in Gypsum also assists in increasing the nutrient intake of plants and turf etc.
For general soil conditioning, work approximately 500g per square metre through the soil by digging and raking. This process is best carried out prior to planting, however gypsum is often blended into existing gardens. When blending into existing soils, take care not to disturb shallow roots.
For Lawns, spread approximately 500g per square metre evenly over the turf and water in well. For best results, spike or aerate the lawn before applying the Gypsum.
For breaking down light clay soils, disturb the clay by vigorously breaking it apart with a mattock or rotary hoe. Once properly broken apart, spread 1kg of Gypsum per square metre over the clay and mix it through. If the clay soil is dry, water after applying Gypsum.
For breaking down heavy clay soils, disturb the clay by vigorously breaking it apart with a mattock or rotary hoe. Once properly broken apart, spread 2kg of Gypsum per square metre over the clay and mix it through. If the clay soil is dry, water after applying Gypsum.
The process of breaking down clay can be enhanced by also blending Mushroom Compost through the clay soil.
For best results, it is necessary to reapply Gypsum throughout the soil yearly.