Romanticism is a type of poem that expresses a love for nature. Originating during the Romantic Era towards the end of the 18th century, romantic poetry became a well-known way for poets to add to the literature of this very important philosophical movement that made a splash in various art forms including novels, poetry, architecture, and art.
Romantic poetry became prominent after the Industrial Revolution, and its subject matter was typically a return to nature, and denial of the emerging technologies and urbanization of much of Europe. William Wordsworth was a very famous romantic poet and included vivid descriptions of flowers and landscapes in his poetry. Most notable is his poem The Daffodil.
Regarding its poetic form, romantic poetry has no set rules or meters, but rather it must praise nature and its sublime beauty. It is a very beautiful and peaceful movement in poetry and there are many great poems to be read from these times where attitudes were changing and conventions were challenged.