We have a lot of four-leaf clover.
It spread out from where it was originally planted and now it is in the lawn. After mowing the lawn short, the clover soon grows tall again.
There is a way to get rid of it by using a weed killer without killing the lawn. It would be a pity to use weed killer because there are four or sometimes even five-leaf clovers, but it seems difficult to let them grow without killing the lawn.
I will do something about it when the weather is better. In the meantime I will pick four and five leaf clovers. I can press them and laminate them in plastic.