Several clematis with "bare bottoms"
Sorry for the goofy title, but it seemed to fit the issue I'm facing.
We moved into a house that has several fairly mature clematis growing. They are blooming beautifully, but the bottom 2 feet of all of them are bare and the brown stems are showing, detracting from the flowers. I'm assuming that this is because they haven't been pruned properly.
Luckily, a record of names were kept so I know which ones they are. There are 3 Jackmanii, 1 Asao, 1 Pink Champagne, 1 Madame Julia Correvon and 1 Multi-Blue.
I'm wondering if any of you have suggestions as to what I can do to encourage new growth for next season along the bottoms of these plants. Any advice would be appreciated.