After looking at the sick plant guide I am going to assume this is a chlorine problem as we have a lot in our water. I never thought about it before I used it.
I'd def say nute burn. What type of feeding regimen is she on? How old is she? Whats your soils ph? Give us all the info you can and someone will help you.
The ph is between 6.5 and 7.0. Cheap Ph test kit I got.
The soil I am using is Schultz potting soil plus. It is suppose to feed for 9 months and is states a slow release. It's:
0.12% nitrogen
0.09% phosphate
0.07% potash
0.01% sulfur
This all seemed to start when I left it outside one day. It was burt a bit from the sun but I never put it out again. It came back a bit but never recovered completely. Now it's just getting worse.