Noun
はな
ヒマワリは、とてもきれいな花です。
The sunflower is a very beautiful flower.
この花の花ことばは、はな毛ボーボーです。
In the language of flowers, this one means bushy nose hair.
何か花を使った料理が知りたいんだけど。花のスープとかって聞いたことある？
I want to learn how to cook with flowers. Have you ever heard of flower soup?
The kanji and the word are exactly the same. That means they share meanings as well.
Since this word is made up of a single kanji, it should use the kun'yomi reading. This is the reading you learned when you learned the kanji, so you're good to go. Don't forget to stop and smell the roses on the way, though.