In light of fall, Halloween, and Thanksgiving, pumpkins could make an interesting poetry topic idea to explore at this time. A number of poetry ideas can come from thinking about pumpkins.
Pumpkins could generally lead to poems about one of the three time periods mentioned above (fall, Halloween or Thanksgiving). A poet could, from one of those points, write about things such as jack-o-lanterns, pumpkin pie or decorations.
A poet could also write about the varieties of pumpkins and their shapes and colors.
Additionally, a poet could focus on the structure of a pumpkin: a thin skin, a thick wall, a hollow core and seeds inside, and use this structure metaphorically in a poem.