Greetings Kenneth:
My initial concern, based on what you've written, is that you may be over-watering these newly planted trees. Newly planted trees do require a calculated watering regiment if adequate precipitation (e.g., rainfall) does not occur. Your water regiment is typically a factor of: precipitation, weather and temperature, soil texture, tree species, and size of the tree.
Please refer to the following MO Website: http://extension.missouri.edu/publications/DisplayPub.aspx?P=G5200
Best of luck!