Over 100 degrees is not a problem they take it in stride in full sun here. The babies will get sunburn and may even lose their leaves (mine did) and they quickly acclimated to Kansas weather after losing the leaves they shipped with (potted 4" plants). The alkaline soil here is very similar to yours so they will be fine. They benefit greatly from a shovel of manure on top of the ground and some wood chips. You might want to look at this thread Carmine Jewell's don't sucker much? and this one My "Romance series" cherries - #25 by clarkinks. I think the price for Juliet should be less http://honeyberryusa.com/info/HoneyberryUSAPricelist.pdf but maybe quantity or other factors are affecting the cost.