Fertilizer for viburnums

Fertilizer for viburnums

Question: what fertilizer for viburnum

I would like to know, please, which granular fertilizer to use to support the growth of some Viburnum plants, about 60 cm high, purchased and planted about a month ago. Thank you and best regards. Thomas


Fertilizer for viburnums: Answer: what fertilizer for viburnum

Dear Thomas,

the choice of a fertilizer to use in the garden must be made from season to season, because plants are living beings, and as such, at any time of the year, they need different substances, which improve their development, just like we beings do humans, which in the summer we take mineral salts supplements, because we excrete an excessive amount of them due to sweating, while in the middle of winter we do not need these minerals. On the packages of fertilizers it is precisely indicated which substances they contain, through the title (ie the concentration) of each macro-element of which the fertilizer is made; the three fundamental macro-elements are NPK, that is nitrogen, phosphorus and potassium. Nitrogen is useful to improve the development of the green parts of the plant, and therefore it is a fundamental element in the first months of spring, when the plants restart their vegetative cycle, and is then exploited, to a lesser extent, in the remaining months of the year; phosphorus, on the other hand, is essential for proper development of the root system, then enters the metabolic processes of the plant, and is particularly present in young shoots; potassium is important in fruit production, in the coloring of flowers, improves water absorption and makes plants more resistant to parasites and climate change.

In addition to these three fundamental elements, a fertilizer must also contain other elements, in smaller quantities, namely iron, molybdenum, boron, manganese, sulfur, calcium, copper, zinc. If none of the aforementioned trace elements are present on the label of the fertilizer you buy, I invite you to change fertilizer.

Typically in the garden, fertilizers richer in nitrogen are used in spring, richer in potassium in late spring and up to autumn, and then back to nitrogen-rich fertilizers in autumn; consider that any fertilizer will have sufficient amounts of phosphorus for your viburnums, because it is the element that the needs of plants are usually lower. I therefore invite you to use a fertilizer for green plants in late winter, one for flowering plants in spring and summer fertilizations; consider that if you use a slow release granular fertilizer, you will need to spread one dose at the end of winter, and another 4 months later; the last fertilization, the autumn one, is often done with manure, because in addition to enriching the soil, it also improves the mixture of the soil itself, and therefore should be spread and lightly hoed around the plants. If you don't want to use manure, use green plant fertilizer again.

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