The turnips in the Wart fight spawn in a set direction and pattern. A turnip will only spawn when Wart is attacking and when the player is not already holding one. In the event one doesn't spawn, the pattern is paused until the next turnip can spawn.

The Pattern:

1. • > -
2. • • <
3. • > -
4. > - -
5. • < -
6. • • >
7. • < -
8. < - - Repeat!

GIF: