92aea58e____Friends_of_the_Urban_Forest__Possible_Causes
[Symptom] Yellowish leaves. However, the soil may be swampy or even smell bad. [Solution] Choose an appropriate species; amend soil with organic matter to increase drainiage; raise tree if possible. [Possible Causes] 
Overwatering/poor soil drainage
Common Problems & Disorders | Friends of the Urban Forest
Possible Causes