Overwatering - As%20trees%20can%20be%20underwatered%2C%20they%20also%20can%20be%20overwatered.%20Too%20much%20water%20reduced%20a%20tree%27s%20ability%20to%20respirate%20and%20participate%20in%20gas%20exchanges%20outside%20of%20those%20conducted%20through%20photosynthesis.%20Signs%20of%20overwatering%20include%20yellowing%20in%20the%20leaves%2C%20frail%20leaf%20petioles%2C%20or%20persistent%20moisture%20in%20the%20area%20around%20the%20tree.