Step by step
Choose a flower that interests you and spend some time thinking of words to describe the flower – the way it moves in the wind, smells, feels, its colour. Make these into flowery alliterations, use the same vowel sounds or experiment with onomatopoeias.
Write a simple poem based on the flower. This could be a cinquain (2,4,6,8,2 syllables) a haiku (5,7,5) a shape or Kennings poem (several 2 word metaphors that describe a noun without revealing what it is).
For an acrostic poem, write the flower name vertically down a piece of paper, with the letters in the middle of the page. Think of different lines of the poem including one of the letters of the flower name. For example, dandelion
Younger pupils can work in a group with the teacher writing down the pupils' descriptions.