Bubbles said:It could be that your plant was in too much sun after being indoors over winter. The leaves may have "cooked" a bit
Can you tell us where you're located?
Bubbles said:@LemonBonsai....I see that your temp is quite different than mine. That's why I asked where you live. Austin temperature will be climbing to 92 this afternoon.
I checked one of my plant books, Tropical Foliage Disorders, and it could possibly be a potassium or nitrogen deficiency. Do you know the name of the plant? It may be easier to identify the cause. I sincerely hope you can save it.