I have a ponytail palm plant..this is my first plant ever im not really sure how to care for it..i know it needs sun and not much water..just got the plant im not sure if im suppose to put it in another pot and add new soil? if i do need to do that which soil do i buy? it saids i need to feed it liquid formula all purpose plant food but when and how many times and how much do i add? its also changing color on the end of the leaves and in the middle..also i have it sitting on my window the sun dosent shine much because im facing a tree and it blocks the sun in my window..it dosent get much sun but lack of the sun rays..