I planted 2 45gal Red Oaks about a month ago. They are about 20 feet apart and I planted them the same way and used root stimulator and compost. So far I've been trying to water them for about 15min each everyday with a spot sprinkler that will cover the root ball area and some. I've noticed one tree looks good but the other has started to have red tips on the end of a few branches, should I be worried?