I've been lucky with mine--the only thing I have to do is spray it with a systemic insect spray maybe once a month--no aphids or japanese bean beetles. I don't like spraying anything and I won't spray around my pond at all, but in order to keep the bean beetles from killing this plant, I do it.
![Smiley :)](https://www.worldwidewatergardeners.org/forum/Smileys/smilies_smf/smiley.gif)
Oh, you need to get another one....
![Wink ;)](https://www.worldwidewatergardeners.org/forum/Smileys/smilies_smf/wink.gif)