Clematis lawsoniana

I grow this and I am ready to give up on it. Should I give it another chance?

Hi Vincent,
I must admit it is not a prolific flowerer, but when it DOES, they are 4-5" across, and really stand out in the shady place mine is in.
I bought a pot of what was purported to be Hagley Hybrid, but also had cuttings of Mrs.N.Thompson and Lawsoniana in with it!
Feed it in the spring, then tell it, it is its last chance!

I will take your advice. Mine seems to be darker than yours but the flowers are big ( but rather formless) I wonder if I just bought a pup.