Depends on what you are trying to accomplish. You need to take a soil test and get a recommendation of what's needed to change the pH of the soil. Your country extension service should be able to help you. Or check with you local independent garden center. Best and Happy Yardening, Nancy.
Limestone Pellet Coverage
Question From: G. Creech - NORTH CAROLINA
Q: How many 40lb. bags of limestone pellets are needed to cover a yead 2,500 sq. ft.