House & Garden Trace Mix is an excellent safeguard against micronutrient deficiencies in your plants. Trace Mix will also help plants recover from a lack of these essential minerals. Fast growing plants can often develop a deficiency of trace elements during their development. Trace elements regulate and facilitate the plant's metabolism. Without these important minerals, the plant cannot develop properly and growth will slow. Trace Mix supplements this deficiency and also contains enzymes and vitamins which act as a catalyst to growth. The most common deficiency symptom in plants is called chlorosis which shows in the yellowing of the plants leaves. This is mainly caused by the deficiency of trace minerals such as zinc, copper boron and a few other minerals. Trace Mix corrects all these deficiencies when added to your plants either via your nutrient tank or via a foliar spray.