Q&A for How to Make a Plastic Bottle Wormery

Yes, any size bottle can work. You can get more from a five liter bottle than a two liter bottle.

Yes. The wormery will be smaller than the one in the method, but if you quarter the amount of everything it should work. Don't keep too many worms in the bottle (2 or 3 at most), as worms need space. It is also possible you won't get as much from a smaller bottle.

It doesn't matter what type of bag you use to cover the wormery as long as it is opaque, because worms thrive in dark spaces.

Try to have a bottle larger than 500ml. For a 500ml bottle, quarter the amount of everything you put in. You don't want the worms to suffocate or have no space.

Instead of sand, you could just use more soil. Mulch can also work as a replacement.