If you encounter Hay in a Puzzle level, try to remove it quickly or it will keep spreading to take over your Puzzle board!
You can remove Hay blocks by matching directly next to them or by hitting them with Boosters (such as Bombs or Rockets):
If you don't manage to remove any Hay in a move, it will spread over any available Puzzle pieces:
Hay will not spread over other special Board elements such as Boxes, Lockets or trapped Puzzle pieces (trapped by Vines or Cobwebs), but it may grow over background elements such as Tiles or Grass.