This video teaches you
To preserve flowers in a jar, first you'll need to air-dry them. Remove the excess leaves, cut the stems down to fit in the jar you're using, and tie the flowers together with string. Hang them upside-down in a cool, dark place for at least 2 weeks. Once they're dry, spray them with hairspray to help them last longer. Then, arrange them in the jar and seal it with a lid. Decorate your jar with a bow made of twine if you'd like, then put it on display!