Source: https://www.gardendesign.com/annuals/vs-perennials.html

Is the type of plants that last 2 to 3 years and up. Some may live for only 3 to 5 years.

They're typically cold-hardy plants and will return again in the spring. Usually bloom for only one season each year.

They may need to be pruned and divided regularly to maintain their vigor and keep them tidy.

Most perennials require less water once established.

Best plant in spring or early fall. It's difficult for plants to established during the heat of summer.