Flower Power is a two-part quest given by Bluebelle, around the time you gain access to the Flower Tower Place of Legend. For such an advanced quest (with such a great reward), the first part is wonderfully fast and easy!
If you'd like to look ahead and be ready for the next quest, check out the page on Seeds of Rebirth.
Part 1 of 2
Part 2 of 2
Send Bluebelle to the Flower Tower
Collect 1 Spellbound Orchid
Make 1 Spellbound Bandage