From the ArcaMax Publishing, Gardening Newsletter:
http://www.arcamax.com/news/gardening/s-11596-422839
The sudden appearance of yellow leaves on newly transplanted trees and shrubs is often a good indication of stress to the root system. It may signal too much water and oxygen starvation, or soil compaction. Aerating the soil will help to alleviate the problem. Do not fertilize woody landscape plants now, since applications of nitrogen can stimulate late growth that is susceptible to an early fall freeze or winter injury.
This news arrived on: 08/19/2004