Adding lime to soil raises the pH so it becomes less acidic. Lime can 'green-up' a lawn. ... In addition, lime increases bacterial activity, which helps improve soil structure. Many sources suggest liming your lawn before seeding to better prepare the soil for healthy grass growth.

How long before lime turns grass green?

There is no “fast-acting” lime for grass and it will take at least several months for lime to mix well into your soil and create the beneficial balance of nutrients. It may take a growing season or two, or even three, to see significant improvement.

What does putting lime on your lawn do for it?

Adding lime to soil raises the soil pH and keeps the correct pH-range for grasses to thrive. When the soil is at the optimal pH level, more nutrients like nitrogen from lawn fertilizer is available for the grass to utilize, allowing grass to grow fuller and thicker.