Symptoms of common nutrient and mineral disorders.
Excess ammonium in poinsettia
Spindly growth and pale; downward cupping leaf margins
Excess sodium in poinsettia
Marginal leaf necrosis
Iron-deficient gardenia
Interveinal chlorosis. Entire leaf may turn yellow or white, except for the veins
Excess boron in chrysanthemum
Chlorotic or purplish to brown marginal necrosis or spotting of leaves. Foliage may be dry or papery
Boron-deficient poinsettia
Chlorosis progressing to necrosis along margins of older leaves. Slight necrosis of leaf veins or chlorotic leaf spots
Iron-deficient gerbera
Interveinal chlorosis. Entire leaf may turn yellow or white, except for the veins
Manganese toxicity in chrysanthemum
Stunted, chlorotic younger leaves. Necrotic spots between veins
Nitrogen-deficient chrysanthemum
Leaves pale green to yellowish overall. Commonly appears first on older leaves
Phosphorus-deficient poinsettia
Foliage yellowish, reddish, or purplish, especially on older leaves.
