Where can I buy the fairy lights for decorating the garden?

Amazon or eBay, some craft stores.

I've seen them at Walmart, too.

Mary...Trees or Trends have.

Ebay.

Amazon, Ebay, Michael's, Hobby Lobby.

Here you will find all kinds! https://amzn.to/2FKetvG

Amazon is doing there prime day on July 15&16 might find them pretty cheap on there, if not you can try a few other spots , not sure how fast you need them.

Falling prices store, eFavor,Oriental Trading, also check on offer up and letgo under wedding decor. Hope this helps out

Everywhere online,hardware,big lots,discount stores,dollar store,some grocery stores hangers? those too everywhere just need to look and see what kind you need ;this is world wide DIY forum if you are trying to post question directly to a project need to do that on actual project & there are 2 areas "Comment" and under project on" ask a question" to save project click on heart that says "Iwant to do this"