How to Write An Acrostic Poem:
Write the letters of your word or phrase down the left-hand side of your page, with one letter on each line. You can skip a line between letters if you want to leave room to write more than one word.
Now, think of words which begin with each letter - don't try to make a poem yet, just write down all the words you can think of which will describe or explain flowers. Use a thesaurus if you have trouble thinking of words! If you need more room, continue the list on another page!
Once you have a list, start thinking of how to write your poem. Which words or phrases are the best ones to describe or explain a flower? Which will make the clearest mental image? Which will make your readers understand flower the best?
Nobody else can tell you what to write - poetry is your own emotion put onto the page! Click on the Related Questions for more help.