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On the market we find various products for fertilizing the soil, which are essentially divided into organic and chemical fertilizers. Fertilizers of chemical origin are harmful to the environment and also impoverish the soil. To give plants nutrients and at the same time restore the fertility of the soil that has been lost due to chemistry, we can use natural fertilizers. Among these we find compost, manure, but also mineral deposits such as saltpetre, humus, peat. For example, most organic fertilizers contain nitrogen in insoluble form, which acts as a slow-release fertilizer, thus increasing the physical and biological mechanisms of soil conservation. But let's see in detail what the natural fertilizers mostly used in the garden.
Natural fertilizers, the stall
Lostallatico, which can be purchased from nurseries and agricultural consortia, can only be applied in combination with other compost. It is a type of manure consisting of a mixture of the manure of many animals (cattle, sheep, horses, etc.) treated and transformed to obtain the fertilizer that is available on the market.
Natural fertilizers, coffee grounds
Coffee grounds are an excellent fertilizer for their nutritional qualities. Their use is very simple: just add a part inside the pots where the plants grow.
If you have a domestic composter, you can of course use the coffee grounds for the preparation of COMPOST, as they belong to the so-called “green” category, which is an element rich in nitrogen. Coffee grounds contain about 1.45% nitrogen, but not only are they also composed of magnesium, calcium, potassium and traces of other minerals.
It can also be used as a liquid fertilizer: just add two cups of coffee grounds to a bucket of water, after a few hours of infusion, you will have your natural liquid fertilizer for garden and pot plants. It is ideal as a nourishment for the leaves.
Natural fertilizers, green manure
An effective and natural method widely used in organic farming to fertilize the soil is green manure. In practice it consists in cultivating a vegetable not to obtain food or other derivative products but to bury it and thus fertilize the earth for the next crop. Its use has many advantages:
- enrichment of the soil with organic matter and therefore with nutrients
- increase in the water availability of the land
- improvement of the physical structure of the soil
It also immediately provides 50% of available nutrients and the remaining 50% in subsequent years, protects the soil from erosion and controls weeds.
The plants most used for green manuring essentially belong to three families: crucifers, grasses and legumes.
Natural fertilizers, the lupine
Ground lupine is also a natural fertilizer, it is easily found on the market and is obtained from white lupine.
Its seeds are dried and then ground, thus becoming a natural fertilizer capable of making the soil fertile but not only: thanks to its properties it also performs an excellent amending action, that is, improving the physical and biological characteristics of the soil. As a fertilizer it is also able to supply large quantities of slow release nitrogen.
Its use is particularly suitable for lemons, oranges and citrus fruits in general and for acidophilic plants such as azaleas, camellias, gardenias, hydrangeas and erododendrons but its use is also excellent for all garden and apartment plants.
For the natural do-it-yourself fertilizer par excellence, we refer you to the more detailed information on do-it-yourself compost