You can also get bagged lime from hardware or farm/ranch stores. And also from nursery or botanical types of places. I've bought ag lime from Ace hardware, and I've bought hydrated lime from a feed store. The hydrated lime is some potent potent stuff.

Don't mix it with water and spray it on your lawn if your spray nozzle is leaky. That lime will eat the skin off your hands by the next morning. Don't ask me how I know this.