Add the pumpkin, pumpkin pie spice, ginger, and sugar to your bottle
Fill with kombucha, leaving at least 1/2 inch of headspace, depending on the shape of the container.
Cap tightly and shake gently to combine.
Allow to ferment 3 to 7 days or until kombucha is carbonated to your liking.
Move bottles to refrigeration for storage.
When you are ready to drink it, open carefully, without shaking, to avoid spilling the bubbly kombucha over the top of the bottle.
Strain kombucha through a small strainer in order to remove ginger and any clumps of pumpkin pie spice. Serve cold.