Experts and BHG readers answer.
Rhubarb, maybe getting to much rain???
Thanks for writing. I'm sorry, but without being able to see your plant, I can't say for sure what's wrong with it. This free service really isn't suited to diagnosing plant problems because in most cases, we'd need to be able to examine the plant to determine a cause.
That said, you might check in with the folks at your local cooperative extension office --- they should be able to help more if they can come out and take a look --- or if you can bring a sample leaf in for them to examine.
---Justin, Senior Garden Editor, BHG.com