Answer: The symptoms you describe are most likely caused by transplant stress. When the roots of your new trees become established in their new homes they will perk up and will most likely replace the lost leaves. Summer is when they grow the most, and being uprooted and planted can shock them enough to concentrate on roots instead of leaves. For that reason they can drop some leaves as a sign of stress. The best thing for you to do at this point is to water your trees deeply once or twice a week to encourage deep root growth in soil that is cool. Don't water more frequently and don't just sprinkle them with a hose. Instead, make watering wells or watering basins beneath each by mounding up a few inches of soil all around the tree, about 12" from the trunk. Fill the basin with water, allow to drain, then fill it a second time. This method of watering concentrates the moisture over the roots of the tree and allows it to percolate down, wetting the entire root mass. Once a week should do it - twice a week if your soil is sandy and drains really fast. Your trees should perk up in a couple of weeks and begin to show new growth. Best wishes with your new trees.
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