butterfly bush in a pot is dropping yellow leaves.

Question

I know I have a big aphid issue but I also have at least a dozen little Monarch caterpillars feasting on it. So is there anything I can do? I am afraid if the leaves keep dying there won’t be enough feed for the babies before cocoon time. 

Answer 1

This is likely a watering issue; too much or too little.
This article will help you.
https://www.gardeningknowhow.com/ornamental/shrubs/butterfly-bush/butterfly-bush-container-care.htm