Answer: If you prune now, you'll lose the autumn display so I'd suggesting waiting and pruning next spring. The general rule of thumb is to remove no more than one third of the live plant material in any one pruning session. So if your shrub is 6 feet tall you can safely remove about 2' of the height. Since you want it smaller than that, you'll want to wait until the following spring to remove another third of the plant. Pruning in this way will not stress your burning bush and it should continue to thrive. Pruning it down to 2' all at once can really stress it and it may take several years for it to recover. I'd do it over a 2 or 3 year period of time for best growth and performance. Good luck with your project!
Q&A Library Searching Tips