When a plant in the ground or in a pot begins to look pale and unhealthy, or starts to show signs of yellowing, reddening or browning leaves, it is probably experiencing some kind of problem. The exception to this is when a change is due to a normal part of the plant’s cycle, e.g. iris foliage dieback; or leaf color changes in deciduous trees in autumn.
Problems may be due to a number of factors — disease, drought, insects or environmental pollution. In order to treat the problem, it is important first to diagnose it.
Find fairly simple tips on solving plant nutrient deficiencies if it is diagnosed correctly.