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Ast mit reifen, dunkelroten Sauerkirschen

Foliar fertilisation in stone fruit

The foliar fertilisation with micro-nutrients (e.g. manganese, iron, magnesium) is well established since many years.

Foliar fertilizers can be used preventive as integrated part of the fertiliser strategy or if it comes to an undersupply with nutrients and visible symptoms. The leaf analysis can help to analyce and recognize the availability for each element.

Nutrient availability

Many parameters in the soil can limit the availability of nutrients – high pH-values can block micro-nutrients, low pH-values can block macro-nutrients. But also dry and cold weather conditions, soil texture and some nutrient antagonism (e.g. oversupply with potassium vs. magnesium and calcium) can lead to a deficiency of nutrients.

Specific requirements for stone fruits

Stone fruits are easier to fertilize and less demanding. Most important are the macro-nutrients, nitrogen for high yields and potassium/phosphorus for stimulating the fruit quality. The appropriate potassium-calcium-relation will enhance solid fruits with skin stability. In addition, the micro-nutrients zinc, iron and manganese are important for growing stone-fruits.

Stabile yields

The nutrition with amino acids in combination with the auxin effect of certain amino acids is particularly important for fruit setting and flower bud quality. The multiple application of Aminosol®  from beginning blossom will enhance fruit setting and the fruit growth. In addition, leaf and fruit symptoms in plums will be reduced and the quality improved.

Iron chloroses

Cherries are susceptible to iron chloroses. An iron deficiency will be visible by yellowness of the youngest leaves with dark veins. Different parameters, e.g. soil structure, moisture and pH value will influence the iron availability. The foliar fertilizer Lebosol®-HeptaEisen will enhance the iron supply and availability.

Fruit quality and shelf life

Lebosol®-Calcium-Forte SC, free of chloride, will improve the calcium concentration in the fruit and enhance quality and shelf life. Besides that, Lebosol®-Calcium-Forte SC is containing the micro nutrients manganese and zinc as well.

Post-harvest treatment

Boron and zinc are mandatory for flowering, fruit setting and leaf development. At this period, trees can’t take up enough nutrients from the soil. For best fertilization and nutrition, we recommend a post-harvest treatment with Lebosol®-Bor and Lebosol®-Zink 700 SC

These products can be combined with the application of urea and Aminosol® to enhance the storage of reserve substances for the next growing period.