Stinging nettle, or urtica dioica, is a perennial flowering plant that has been used medicinally for ages, dating back as far as Ancient Greece. Today, stinging nettle can be found all over the world, but its origins are in the colder regions of Europe and Asia. The plant usually grows between two to four feet high and blooms from June to September. It grows best in nitrogen-rich soil, has heart-shaped leaves, and produces yellow or pink flowers.