My coconut tree is dying from the bottom up?
I have had this indoor palm for about 4 years, in three different apartments. It has grown about 8 or 9 feet tall, but in last 3 months three of the bottom frond pairs have turned from green to tan to brown over the course of about a week each. First was the lowest frond, then the second lowest, and finally the third lowest. After I lost the third one I dug up the tree and checked for root rot (there was none) I added some pellet fertilizer, and put it back in its pot. I also added three grow lights to it as I thought maybe the new position received less light, but the problem persists with the fourth leaf set. What could be the cause and the solution?