Galls can be formed for a myriad of reasons. Midges, Wasps, and other insects often form galls as part of their life cycle.

A useful website for this is - https://www.gallformers.org/

If you have a gall you would like us to identify, email us - moth@agrobio.works.

If we believe it to be from an Agrobacterium or Rhizobium species, we will pay for shipping and let you know what we figure out.