Select two seeds from the drop down menus below. You will be shown all possible confirmed crosses from the selected seeds.
To the right of each cross is an option to show a table visualizing the optimal way to plant each seed to obtain the selected cross.
Select multiple seeds from the left column that you would like to find crosses for and move them to the right column. You will be shown all possible cross combinations from the selected seeds.
You can ctrl+click to select multiple seeds and use the arrows to move or you can double click to move individually.