Manganese, Manganese Deficiencies , Manganese Deficiency, Manganese Deficient, Nutrient Deficiency, Mineral deficiency
by Sten Porse (CC BY-SA 3.0)
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Manganese deficiencies are common in plants, but it's the gardens with sandy soils or high organic matter content which are most prone. Manganese is essential for plants because it assists in the formation of chlorophyll, the primary pigment responsible for photosynthesis. In cases where there's too much iron, manganese absorption can suffer. Similarly, with too much manganese, iron uptake is impacted. It's also common to have a lack of both nutrients!
Yellowing between the leaf veins appears on the older leaves first.
Plants lacking in manganese should be sprayed with a solution of manganese sulphate (1.5g per every 2 sqm).
Avoid over-liming soils if: garden soil is of a sandy consistency, contains high levels of fen peat, or if your garden is on marshland.