Chlorosis

From BonsaiWIKI

Chlorosis is yellowing of the leaves making up the foliage of a plant. The cause is usually one of too high a soil pH, but it can also happen if the soil pH is too low, or if other chemicals are present in too great an abundance. When chlorosis occurs, either iron or manganese become chemically bound-up in other compounds and unavailable to the plant.

Testing pH and lowering soil alkalinity, if necessary, is the correct way to deal with the problem.

Treating the soil with chelated iron may help to alleviate the symptoms.

Yellow leaves may have other root causes (including overwatering). Green leaf veins in those yellow leaves helps to identify the cause as chlorosis.

Fertilization Terms

Fertilization: Foliar fertilization | Fertigation | Feeding | CEC ratio | overfertilization | fertilizer deficiency

NPK: Nitrogen (nitrate ammonium and urea) | Phosphorus | Potassium

Minors: Boron | Chlorine | Chromium | Copper | Iron | Manganese | Magnesium | Molybdenum | Sulphur | Zinc

Organic fertilizer: Fertilizer cake | Fish emulsion | Seaweed extract | Bat guano | Bone meal | Blood meal | Biogold | Cottonseed meal | Fish Meal | Chicken Manure | Cow Manure | Soybean Meal | Alfalfa Meal

Misc: Epsom Salts | Rock Dust | Gypsum

Inorganic fertilizer: Miracle-Gro | Miracid | Osmocote | Dyna-Gro

pH: Acidity | Alkalinity | Chlorosis | Vinegar | Lime