I'm pretty new to growing plants and this is the first plant that i care about. I did bought this plant about a month ago and it was delivered as it is in the photos. I've been watering it two to three times per week with about 1.5 liters (about 50 ounces) of tap water. I live in the capital of Brazil, Brasília, which is very dry (10% to 40% humidity) and hot (18° to 35°C / 66° to 95°F) during the day. The palm gets direct sun between 3 to 6 pm. What may be causing the dry leaves?