Last time I planted apple trees I was living in maine. A pretty good climate to grow apple trees. Plenty of rain, good soil over most of the state, sun not too intense, wind not too bad over most of the state. Just stick them in the dirt and they are good to go. New Mexico it's a lot different. I didn't realize how much water these things need until this time around. Depending on how hot it is I am watering them with 3 to 5 gallons of water per tree just about every other day if not daily. So I'm definitely going to need a reliable well pump setup and a backup, with out water trees planted that year could be dead in less than 5 days. Once the trees get rooted in they shouldn't need nearly as much hose water. I'm thinking once or twice a week at most, no hose water if it rains. The wind is another problem. The wind beats up and tears up the leaves. All I can do for that is plant next to some kind of wind break, such as another tree or fence. Then there is the sun. It's so hot here some of the leaves are scorching. If I keep the trees well watered it's not as much of a problem. Not sure how to fix the sun problem other than water, water, water.