Fall and spring are generally the best times to lime lawns. Fall has an added advantage, as rain, snow and cycles of freezing and thawing help lime break down and begin to work.
Can you put down lime anytime?
When to Add Lime to Your Lawn
Many insist fall is the best time to lime lawns because it gives the lime the longest time to work into the soil before the growing season. Experts agree that you can spread lime anytime, but it is ideal during the Spring and Fall seasons and during the morning or evening hours.
Should you put lime down before it rains?
Only apply lime before rain if the expected rainfall is light and brief. Heavy rain or extended periods of rainfall can saturate your soil with water, causing lime to run off your lawn and be wasted.