Limestone or lime and other nutrient amendments can be added at any time during the year, but sulfur should be applied during the spring or during the fall months.
The addition of limestone or lime, however the amount is dependent on the results of the analysis and size of the lawn.
The addition of elementary sulfur will reduce a high pH level, however the overall process time may take several years depending on how high the pH level is and the buffer pH. Ammonia sulfate can speed up the process, but it is still a slow process.
No, adding any amendment on a routine basis is not a recommended practice. Prior to adding any amendment, it is our recommendation to have a soil analysis conducted to determine which amendments are required and at what rate, such as pounds per 1,000 sq-ft.