You cannot! But, you can use it on Shaymin. Just go to your bag and select it, and choose 'Use'.
You'll have to have Shaymin in the Party and talk to her, then she'll notice your Shaymin and give you the Gracidea Flower. (Platinum only.)
you get the gracidea in floaroma city from a girl that has blond hair but to make her give it to you you need a shaymin that you captured in platinum in the flower paradise. I did it and a have a shaymin and the gracidea
Find someone who has Pokemon platinum then tell them to get a shaymin and a gracidea flower then tell them to use the flower on the shaymin and then trade it. PS you cant trade the gracidea flower because it is in the key item
first you have to get shaymin and talk to a lady near the flower shop in floaroma town and she will give you te gracidea flower
I'm guessing you're talking about the Gracidea Flower. To get it, you simply have to have Shaymin in your team and talk to a girl in Floaroma Town. She will then give you the Gracidea. This only works in Platinum.
get a gracidea flower and give it to it
Go to a girl in Floaroma Town and get the Gracidea Flower from her. Give the Gracidea Flower to Shaymin for it's sky form. The Gracidea Flower does not work at night.
show her event shaymin
first you need to go back to Shaymin village and talk to the Shaymin closes the the dungeon entrence on the right.
the gracidea flower
It needs to touch a Gracidea, which is a flower that can be bought from the Goldenrod Flower Shop. That is semi-correct. If you bring an event shaymin (not a hacked wild shaymin) to the Goldenrod Flower Shop as the lead Pokemon in your party the girl will give you the Gracidea.
The blond lady in Floaroma Town will only give you the Gracidea Flower if you have a specific Shaymin in your party meaning your Shaymin has to be either an event Shaymin or the Shaymin that was caught in the Flower Paradise in Pokémon Platinum, no other Shaymin will work not even ones that were hacked.