1.   An overly wet soil causes leaves to yellow.

2.   But overly wet soil causes leaves to yellow.

3.   But sometimes too much water can cause leaves to yellow.

4.   Overwatering and underwatering can cause leaves to yellow.

5.   Salt buildup also can cause leaves to yellow.

6.   Sometimes great fluctuations in moisture will cause yellowing leaves.

7.   This causes leaves to yellow and drop.

8.   Too much or too little water will cause leaves to yellow.

9.   Too little water causes leaves to yellow and wilt.

10.   Yellowing leaves can be caused by an iron deficiency, over- or underwatering, or having the pH too high.