Flora is the Winx fairy of nature.
Flora gets a pedicure in this issue. Please click on the link and go to page 14 to see that panel.
In "Welcome to Magix" in her first appearance, Flora is seen wearing pink wedge sandals.
At the start of season 3 Flora and Bloom abandon their sandals footwear and began to wear close-toed shoes. However When she earn her enchantix, she became barefooted.
Flora wears pink open toed socks with her pajama.
The Secret of the Lost Kingdom
World of Winx
The beautiful flower fairy Flora is wearing open toed boots in her new transformation called "Bloomix" (her bare toes can be seen when you look closely).
This is from the sixth season, but I have no idea from which episode that sequence is. In this video you can see a bit of her feet starting from the first second until the fifth. There could be different variations of the transformation sequences (for example versions which have been cut from TV).