I purchased a Raphis Palm in December, about 3' tall, and brought it home. I let it rest for a month or two before repotting into a slightly larger pot. I live in Southern California so the temperature is relatively temperate. The palm gets lots of indirect light but no direct light. I watered it about once per week but I'm afraid I either overwatered it or underwatered it. I'm not sure which, though! The leaves are drying up and shriveling, not just turning brown or yellow on the tips. It keeps getting worse. I'm not sure if I should let it keep drying out or if it needs water. It looks terrible! I've had palms in the past and done just fine. What should I do?
This is the start of a fungal infection. Only water when the top two inches of soil is dry. This can help prevent infection. For now, you will need, both, dolomitic lime, and wettable sulfur. Apply these as per the instructions, and it should recover. The affected leaves will not recover, but the new growth will come out normal.