Values deficient or in excess of those shown could result in poor plant health. Values generally considered desirable for elements in nutrient solutions as ppm . Deficiencies and Toxicity Mobile elements Mobile elements are more likely to exibit visual deficiencies in the older leaves, because during demand these elements will be exported to the new growth. Chlorosis will eventually spread throughout the plant. Stems, petioles and lower leaf surfaces may turn purple.
Leaves are often dark green and in the early stages abundant with foliage.
If excess is severe, leaves will dry and begin to fall off. Root system will remain under developed or deteriorate after time. Fruit and flower set will be inhibited or deformed. Plants are stunted and older leaves often dark dull green in color. Stems, petioles may turn purple.