If the plant only has one or two yellow leaves, or if the yellow leaves are the older growth underneath or below new growth there is nothing to be concerned about. Plants and their constituent parts have lifespans, new growth replaces old growth and old growth dies away. Normally new growth replaces old growth so quickly that you may not notice the death of the old growth.

If, however, large portions have leaves (especially new growth) that are lighter green than they used to be, or have begun to yellow, that is an indication that the water-nutrient combination is out of balance.

There are two common causes of yellowing leaves in otherwise healthy plants: too much water and/or too little fertilizer. Below are tips for determining which of these common problems is affecting your planter. Follow the links to diagnose and learn treatments for your specific problem.

Do you consistently add water to the reservoir before it is empty?

In addition to filling the reservoir, is the plant regularly watered on top by an automated watering system or sprinklers?

Do you fertilize less often than once a week?

Are you fertilizing once a week, but the leaves are still yellowing?

Updated August 2006