If you prefer not to use strong pesticides, there are other ways to get rid of unwanted aggressive and invasive plants.

Many perennials like to be divided in the fall, especially if they have outgrown their space or have ceased blooming well. 

Making potpourri from flowers is an easy dried-flower craft. It smells lovely and makes a great gift and looks pretty in bowls, baskets, and jars, reminding us of summer.