Iris are famously easy to grow, and are some of the most persistent perennials of all. Irises will withstand grass, weeds, and other plants, even if a perennial garden is untended for years!
Irises grow from a root called a rhizome. Most Irises like to have their rhizomes somewhat “exposed,” usually running along like a sausage half buried in the soil. These rhizomes multiply horizontally, forming new sections and finally, a mat of rhizomes from which rise the beautiful fans of leaves and spectacular flowers!