Pomegranate leaves drying out
So I live in Las Vegas and brought over (from Southern CA) a Angel Red pomegranate. It's been about a week, still in the 5 gallon pot, and so far so good. Except the leaves have started to dry up on some of the branches, not turning yellow or anything, but simply drying to a crisp. I'm assuming it's just acclimating itself to the hotter weather, but my boyfriend believes it's not retaining enough water in it's pot so he decided to fill up a bottom tray with water for it to sit in. I'm thinking that's a bad idea and this will kill the pomegranate for sure. Any input would be appreciated, thanks!