I have what I believe is a California palm. We are new to this house, in the North Dallas area, which has an occasional freeze. From what the neighbors are telling me, the previous owners would wrap the trunk in the winter with heavy blankets to protect it. Is this necessary/recommended? My other and more pressing question is that the tips of the fronds are turning brown. Could this be attributed to too much water (it's been raining a lot in the last few weeks)? And lastly, should I fertilize and, if so, what do I use?
Too much water can certainly cause yellowing leaves and browning tips.
Pests and disease can also cause leaf damage.
Without some protection most Palms including the California Fan Palm will not survive winter in your area.
You will need to continue to winterize the Palm.