Tears From The Black Willow Winx Club : Season 3 Episode 12

The Winx Club go to Flora's home planet seeking guidance in breaking the spell cast on Ms. Faragonda. Flora's younger sister, Miele, tags along. Flora earns her Enchantix after saving her sister from the poisoned tears of the Black Willow and dumps the trix (who are sent to stop them from gathering the tears) into the Black Willow's tears where they turn into little girls.