Clay soil can benefit greatly from aeration and nitrogen, but lime is only needed if the soil's pH level is low. Lime does not help clay soil in any other way. Adding compost (organic material) is also a benefit to clay soil, as is sand.

Does lime break up clay soil?

A pH of 7 indicates a neutral soil. ... The addition of lime can raise the soil pH to excessively high levels, reducing the availability of plant nutrients and leading to poor plant growth. Advertisements for gypsum often claim the addition of gypsum will help loosen heavy, clay soils and improve soil drainage.

How do you break down clay soil quickly?

While there are a great many organic soil amendments, for improving clay soil, you will want to use compost or materials that compost quickly. Materials that compost quickly include well-rotted manure, leaf mold, and green plants. Because clay soil can become compacted easily, place about 3 to 4 inches (7.5-10 cm.)