Crop Rotation question?

Hi

I know you need to rotate your plot each year but does anyone have any ideas on the rules of growing something in the same place for the year. For example if I sowed Sring onions in one place in March and they were pulled up in June, can I then sow more onion seeds in the exact same position in July? How that makes sense.

Thanks. That's very good news. Double Spring onions then