Posted: 20/10/2016 at 07:29
I assume you're talking about buddleja?
I suspect they are suffering from transplant shock. It's likely that the roots have been damaged and can no longer sustain the amount of flowers and foliage they used to. I would cut the shrub hard back to lessen the demands on the roots while they recover. Ensure that they are well watered.
This site is primarily UK focused and few of us will have knowledge of the differences in gardening in various parts of the USA.
Last edited: 20 October 2016 07:30:16