I've been told that I can start a new butterfly bush from the cuttings of an existing bush when I prune it. What is the best way to start a new plant from the cuttings? Any special soil or fertilizer? How long before it can be moved outside?
Butterfly Bush Propagation
Certified GKH Gardening Expert
Here is an article or two that you may find helpful: https://www.gardeningknowhow.com/ornamental/shrubs/butterfly-bush/propagating-butterfly-bush.htm