Lime

A compound of calcium, often used to alter soil chemistry by neutralizing acid, making soil more alkaline.

Lime should be applied only when soil testing indicates that it is needed. Lime adjusts soil chemistry, it is not a fertilizer. Too much can raise pH to undesirable levels, causing serious management problems. Do NOT over-lime. Determine how much lime is needed, then apply it over a number of seasons until your soil is back in balance.