My S. purpurea was doing fine outside until I came out to check on it one day, and found this.
It seemed to be doing great, and now all of the leaves are all crispy. I took the above picture about 3 days ago. This is what it looks like now. Mold is starting to grow on the growing point. I'm sure that it's dead.
I checked for pests, but found none. What the heck happened?