Quote Originally Posted by Bright-Flower View Post
I think [you can exchange gendered items at] the calamity salvager or a npc next to them
Quote Originally Posted by InkstainedGwyn View Post
You can't exchange items that were bought off the mog station, only rewarded from the quest, so this isn't entirely impossible...
The NPC (I'm also not sure if it's the salvager or the other one) does let you exchange SOME gendered items, but I don't think it's been updated in ages. It's all older seasonal event gear that is now on Mog Station - kimonos, beachwear, Valentione's aprons, etc.

I'd be surprised if you can't still trade those items if you bought them from Mog Station rather than owning them from the event - it's still the same item to trade, and I'm pretty sure that's all the game looks at. I'd have to test it to be sure though.

In any case, it's irrelevant to the flower crown but it's a good way to try on some Mog Station gear to see whether you want to buy it or not.