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Using organic fertilizers in the garden: what types are there? | > – Guide

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Using organic fertilizers in the garden: what types are there?  |  > – Guide

Status: 07/21/2023 12:43 p.m

Mineral fertilizers can easily be replaced by organic ones such as horn shavings and plant manure. Which fertilizer is suitable for which plants and how can you make it yourself?

Good, fertile garden soil is the best prerequisite for lush blooming flowers and a rich harvest of vegetables and fruit. In the specialist markets there is a large number of different fertilizers to choose from, which provide the plants with the most important nutrients. Often these are mineral fertilizers with nitrate. These artificial fertilizers have a bad ecological balance: the production of one kilo uses two liters of oil. In addition, the nitrate can contaminate the groundwater and contribute to the over-fertilization of natural water bodies.

Especially in the vegetable garden it is better to avoid artificial fertilizers anyway, according to NDR garden expert Peter Rasch. Because the taste of the vegetables suffers, the rapid growth makes them very soft and spoils faster.

Organic fertilizers release nutrients more slowly

Rasch recommends using organic fertilizers instead. Compared to mineral fertilizers, they contain less nitrogen, so a slightly larger amount has to be applied. They only release the nitrogen when they are decomposed by the soil organisms and therefore develop their effect slowly and evenly.

Fertilize with manure, horn shavings and sheep’s wool

Horn shavings are made from crushed cattle horns and hooves and make a good organic fertilizer.

If you live in the country, you may have the opportunity to collect manure from the neighboring farm in autumn and work it into the soil. Alternatively, fertilizer pellets based on cattle manure or horse manure are available in garden centers. Horn shavings and sheep’s wool are particularly good long-term animal fertilizers. Here, too, it takes time for the nutrients to be released during decomposition. Therefore, it should be applied in good time and regularly.

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Vegetable fertilizer in pellet form

If you prefer to use fertilizers of plant origin instead of animal origin, you can also find them in pellet form or as liquid fertilizers in the garden market, for example based on cocoa bean shells. They are a by-product of the chocolate industry and contain many important plant nutrients.

Make nettle manure and other manure yourself

Plant manure is easy to produce, cheap and ecological.

Plant-based organic fertilizers are also very easy to make yourself. Plant manure contains a lot of nitrogen and potassium and is not only a gentle fertilizer, but also makes the plants resistant to aphids, spider mites and caterpillars. They can be made from various plants, such as nettles, horsetail, groundweed, dandelion, garlic, onions and chamomile.

For the production you need about one kilogram of plant cuttings to ten liters of water. The production of the liquid manure takes some time – it takes about two weeks until the batch is ready. Alternatively, you can buy the liquid manure as extracts and simply mix them.

Fertilize with coffee grounds and household waste

There is also a lot of waste in the household, which is well suited as fertilizer. Fish waste is a good fertilizer for tomatoes, says Peter Rasch. Bury the remains of the fish about ten centimeters under the young tomato plants. By the time the roots get there, the fish has rotted. Coffee grounds are particularly good for fertilizing plants that need acidic garden soil, such as hydrangeas and rhododendrons, or cucumbers, zucchini, and strawberries. Always allow the coffee grounds to cool well and dry – if they are damp, they will mold easily.

create compost

Compost is suitable for fertilizing and improving soil quality.

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Other household waste such as vegetable and fruit leftovers, egg shells, but also garden waste such as lawn, shrub and tree clippings can be composted. There they rot into nutrient-rich, humus-rich soil – perfect for fertilizing or as a soil conditioner. However, caring for the compost does take some work, and it should be turned over or turned over about every three months.

fertilizing with urine

What is less known is that urine is also a good fertilizer. However, it should never be applied undiluted, but diluted with water in a ratio of between 1:10 and 1:20. Urine is particularly suitable for heavy feeders such as potatoes, tomatoes, pumpkins and roses, and in autumn it is also ideal for fertilizing hedges and lawns. Compost can also be regularly poured with diluted urine, which enriches it with nutrients and accelerates decomposition.

Further information

3 Min

Garden professional Peter Rasch gives tips for a garden without chemicals. Manure, fish or wool are used, for example. 3 mins

Many use horse manure as fertilizer. But it may contain traces of a herbicide. Vegetable plants such as tomatoes wither away. more

Organic and mineral fertilizers, special fertilizers in liquid or solid form: an overview of fertilizers. more

Pests can weaken plants. They can be fought naturally, for example with milk or soap nuts. more

If you want to combat biting and sucking insects in a natural way, you can make a decoction of tansy. more

Millions of earthworms produce sustainable humus in Geesthacht – on Schleswig-Holstein’s only earthworm farm. more

This topic in the program:

NDR 1 Wave North | The tender ones in the garden | 07.07.2023 | 5:05 a.m

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