Rose Petals are produced by Wild Rose Beds, at the rate of two per bed, every two minutes. To find out more about Wild Rose Beds, click this link.
Maximum sale price in sea trading:
14 royal coin
Myra's purchase price:
11 royal coin, 39 XP
Market where Myra purchases them:
Myra's Potions & Perfumes
How many fit per slot on sea trading ship:
First available at level:
Recipes using this item:
(Click on a name to go to the building or recipe)
Michelle's Note: You will likely be purchasing your first Wild Rose Bed around the same time that you claim the land underlying the Myra's Potions & Perfumes market. Once you have both of these available to you, Myra will begin asking you to sell her your first Rose Petal, and will continue to ask for them for quite a while. I would advise you to take advantage of this for as long as it is available to you, because it is a great way to level up more quickly!
While I wouldn't make this my only method of leveling, if you're already in the game, satisfying a Glurb or Liang request, or just crafting stuff to sell to Myra, make sure you collect your rose petals every time they ding, and then immediately sell them to Myra. She pays 22 RC and 39 XP every time you sell to her. This works out to 1170 XP per hour, with the nice side benefit of earning you 660 RC per hour as well!