I wasn't sure what paperwhites were. Had to do a search to find out they are flowers. When I read that the containers were terra cotta pots, I should have figured that one out...lol. How big are the pots and how many? What about foil gift wrapping paper? That is what I would try.

I would just take two squares of nylon netting, turn them a bit and gather just around the top of the pot and tie with a pretty bow...

Terracotta pots are my favorites, and since Paperwhites usually droop, I tie a lovely ribbon and bow to hold them together. That may be enough decoration for you.