why would clover star to grow in an old lawn?

Question

how would the clover benifit the lawn

Answer 1

Several species are extensively cultivated as fodder-plants. The most widely cultivated clovers are White clover Trifolium repens and Red clover Trifolium pratense. Clover, either sown alone or in mixture with ryegrass, has for a long time formed a staple crop for soiling, for several reasons; it grows freely, shooting up again after repeated mowings; it produces an abundant crop; it is palatable to and nutritious for livestock; it grows in a great range of soils and climates; and it is appropriate either for pasturage or green composting.

Answer 2

Clover has rhizomes with bacteria that fix nitrogen, that is, makes it available for plants to use. Grass uses a lot of nitrogen so the clover might be a cyclical product of your lawn's periodic cycle. Vibrant lawn growth would shade out the clover but eventually nitrogen would become limiting at which point clover would become favored. Clover spread through their root systems so are likely always present in your lawn to some degree. They can come from a distance are windblown seed or might be the >.01% weed seed in your grass seed mix.