Clematis are one of the most beautiful winter-hardy flowering vines for the Upper Midwest, and there’s a little known way to double the volume of vines and flowers produced.
I learned the tip nearly 50 years ago, and it works so well that it deserves widespread promotion. As the clematis vines begin new growth in May, pinch out the central growing tip of each emerging vine. Where there was one shoot, 2 will arise. Continue this pinching of all shoots as they grow through May. Each single shoot becomes two, doubling the volume of vines and flowers. Stop pinching the tips in early June.
More Clematis tips can be found here: https://yardandgardenguide.org/2018/05/23/tips-for-helping-clematis-bloom-their-best/
