Show Minimum date of children, if blank put a dash
I'm having an issue with a sheet I am working on.
I want a parent row to show the minimum date of the child rows, "=MIN(CHILDREN())" which works fine. However if there are no dates yet, I want the cell to display a dash "-" and for the life of me I can't get this work. I have tried using ISBLANK but I don't think I am doing it correctly because I keep getting an INCORRECT ARGUMENT SET error.
The cell is "Started2"
The formula I am using is: =MIN(CHILDREN(), IF(ISBLANK(), "-"))
I have also tried: =MIN(CHILDREN(), IF(ISBLANK(Started2), "-")) but I get a circular reference error.
It's not a huge deal but I just think it makes the sheet look a lot cleaner.