Ideally, you should apply Corn Meal Gluten three times a year, but the spring and fall applications are the most important. Fall application prevents weed root systems from establishing before winter, while the spring application will control the germination of weed seeds from the previous fall. The spring application should be done after the forsythia blooms and before the lilac blooms. The summer application should be from the middle to the end of June, which will reduce the weed seeds that blow in during late May.
In July to mid-August, the lawn will be dormant or semi-dormant depending on the temperature and rainfall. Let the lawn go dormant by not giving it additional water. This reduces the survival of recently germinated weed seeds and the eggs of lawn insects.