Sue: maybe these will help
I would use acrylic craft paint!
22 ideas: https://www.hometalk.com/35468023/s-22-idea-to-make-your-terra-cotta-pots-look-oh-so-pretty
Google Donna Dewberry
Paint and stencils.
Here is a cool way using decoupage: https://www.hometalk.com/43290148/diy-decopauged-napkin-terra-cotta-pot
Hi Sue. You could paint faces on the pots. When you put flowers in the pots, it looks like the hair.
Here's how to cover them with fabric
Moss and terra cotta looks pretty