First thing is to keep weeds under control. We have this handled in some fields and others we have a serious weed/grass issue. Some people say to mow early spring and again in June. The only reasons we mow are to cut weeds down for herbicide or to stimulate growth. You should be able to control grass/weeds with herbicide. I am no expert and still learning every day. Hopefully I will perfect it soon. I have young kids (lack of time) and a camp full of members who are not that interested in weed control. This makes it difficult to maintain a good clover field.