Last updated: August 7, 2021

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Organic fertiliser is a great way to help your garden sprout. Organic fertiliser made from pure plant and animal ingredients is a great way to help your plants grow and have a clear conscience at the same time.

In our big organic fertiliser test 2020, we want to help you find the perfect organic fertiliser for your plants. For this purpose, we have selected different organic fertilisers and the most important facts. We have also listed the advantages and disadvantages for you.

The most important facts

  • Unlike chemical fertilisers, organic fertilisers use only plant and animal ingredients. This means that your garden is not polluted by chemical additives.
  • By using organic fertiliser, nutrients are released naturally. Soil organisms decompose the organic fertiliser, allowing the important nutrients to reach your plants and sustainably nourish them.
  • The use of organic fertiliser is not only environmentally friendly, it also protects the preservation of the soil. The natural extraction of nutrients ensures all-round protection in your garden, for plants, animals and the soil.

The Best Organic Fertiliser: Our Picks

Buying and evaluation criteria for organic fertiliser

If you are looking for the right fertiliser for your garden, you will come across many different types on the internet. We want to make it easier for you to choose the right organic fertiliser with our guide. We want to show you which aspects you should pay attention to.

When choosing, you should consider the following criteria:

In the next sections we describe these criteria in more detail.

Suitability of the fertiliser

The fertiliser should of course be suitable for your plant. There are many different types of fertiliser, so you should find one that is suitable. As different fertilisers have different nutrient contents, not every fertiliser is suitable for every plant.

However, unlike mineral fertiliser, it is not so tragic if you use a little too much fertiliser, as this is broken down organically.

For example, there are different fertilisers for different types of vegetables or for certain flowers. With so many different types of fertiliser to choose from, it is not easy to make the right choice.

Therefore, when buying your organic fertiliser, you should make sure that it is right for your plant. For example, you should buy fertiliser for tomatoes specifically for your tomatoes.

Form of fertiliser

Organic fertiliser comes in many different forms. For example, you can buy your organic fertiliser in liquid or solid form.

This is entirely up to your personal preferences: there is not much difference in the way it works. For example, the solid pellets are easy to dose, but the liquid fertiliser works a little faster.

However, it is up to you to decide which form appeals to you and which is best for your plant.

Package contents / size

Organic fertiliser comes in different sizes and packages. Therefore, there is something for everyone. If you only need a little fertiliser for your flowers or a considerable amount for your whole bed or even your field: there is a suitable size for every wish.

So you can choose individually how much you need so that you don't waste any fertiliser.


The price of organic fertiliser is often a decisive factor when buying. But there is good news for you: Organic fertiliser and mineral fertiliser hardly differ in price.

So the price is no obstacle to start planting with a clear conscience. You can find the first fertilisers from around five pounds. However, the prices vary depending on the size.

Guide: Questions you should ask yourself before buying organic fertiliser

Buying the right organic fertiliser for your plants is not always easy with the wide range of products available. Before you buy organic fertiliser for your garden, you should therefore ask yourself a few questions.

In the following guide we have compiled the most important questions before buying organic fertiliser.

What is special about organic fertiliser and what advantages does it offer?

Anyone who wants to live biologically sustainably probably also wants to do this when planting. Therefore, organic fertiliser is a healthy alternative to chemical fertiliser. Those who focus on sustainability should therefore reach for organic fertiliser.


With organic fertiliser you can let your garden blossom in a sustainable and environmentally friendly way. (Image source: unsplash / Maarten van den Heuvel)

Fertilisers primarily contain the nutrients phosphorus, nitrogen and potassium. These can be obtained from a wide variety of sources. Unlike mineral fertiliser, the nutrients are not present in salts, but must first be made available by microorganisms.

These microorganisms process the organic fertiliser and break it down into its individual molecular components. This allows the nutrients to be released naturally after some time.

The following table shows the differences to chemical fertiliser.

Type ingredients effect advantages
Organic fertiliser plant or also animal ingredients must first be decomposed by microorganisms, therefore a longer period of effect is necessary, however, liquid fertilisers are also very fast in their effect due to added microorganisms improves the soil structure and promotes the soil fauna, biological _COPY0
Mineral fertiliser salts containing nutrients fast effect fast and simple application

It turns out they differ in their effects and benefits.

What types of organic fertiliser are there?

Organic fertilisers are very popular, especially when growing your own fruit and vegetables as well as herbs. Few people want chemical additives when growing their own fruit and vegetables. Organic fertilisers include compost on the one hand and horse or cattle manure on the other.

But since not everyone has space for their own compost heap or the like, the following are practical types of organic fertiliser.

  • Slow-release fertiliser
  • Organic fertiliser pellets
  • Liquid organic fertiliser
  • Vegan organic fertiliser

Slow-release fertiliser

Slow-release fertilisers are ideal for supplying the plant with nutrients all year round.

  • Long duration of effect
  • Good promotion of the soil
  • Release of nutrients takes a relatively long time
  • No quick effect

The biological slow-release fertiliser releases the nutrients gradually to the plant so that it is optimally supplied throughout the year. Slow-release fertilisers are, for example, horn shavings or sheep's wool.

Organic fertiliser pellets

The most common type besides compost are organic fertiliser pellets. Pellets are, for example, pressed manure.

  • Easy dosage
  • No complex production
  • Easy distribution
  • Does not provide as many nutrients as mineral fertiliser

Horse or cattle manure in particular is practically available in this form. The pellets are particularly easy to handle.

Liquid biofertiliser

One type of organic fertiliser is liquid organic fertiliser.

  • Fast action
  • Useful trace elements to help maintain the soil
  • Easy to use
  • Often only available as a mixed product
  • More expensive than solid fertiliser
  • Not a complete substitute for organic fertilisation

Due to its liquid consistency, the fertiliser can be easily absorbed and thus acts particularly quickly.

Purely organic liquid fertilisers are rarely available, because they usually contain minerals and are therefore mixed fertilisers.

Vegan organic fertiliser

If you not only want to grow your garden organically but also do without animal products, vegan organic fertiliser is the right choice for you.

  • No animal ingredients
  • Long-term effect
  • Slow and gentle release of nutrients to the plants
  • Low Co2 load due to the absence of animal ingredients
  • Environmentally friendly
  • Larger quantities required
  • More expensive than animal fertilisers

Since most nutrient sources are animal substances such as urea, faeces, slaughterhouse waste or horn, most organic fertilisers are not vegan.

However, there are some organic fertilisers that can be suppliers of potassium, phosphorus and nitrogen even without animal ingredients.

Who is organic fertiliser suitable for?

Organic fertiliser is suitable for anyone who wants to focus on sustainability in their garden. By using organic fertiliser, the environment is protected, soil conservation is promoted and healthy crops are grown in the long term.

Organic fertiliser is the sustainable alternative for providing your plants with all the nutrients they need.


Organic fertiliser is an excellent source of nutrients that will help you harvest vegetables in your garden soon. (Image source: unsplash / Elaine Casap)

With organic fertiliser, you can beautify your garden and help your plants grow. Unlike using mineral fertilisers, you also help to maintain the soil. This will keep your garden healthy in the long run!

How much does organic fertiliser cost?

The question of the cost of your fertiliser also plays an important role. However, there is good news: The price of organic fertiliser hardly differs from the price of mineral fertiliser.

However, since there are so many different types and sizes, the prices also vary greatly.

What's more, you can easily make organic fertiliser yourself, and it's completely free. How to make organic fertiliser yourself will be shown later in the guide.

How do I make organic fertiliser myself?

There are many ways to make organic fertiliser yourself. The best known way is to make compost. In this case, organic waste is collected at a composting site. This decomposes after a while and forms the perfect organic fertiliser for your garden.

Tip: Dried coffee grounds are also good for fertilising some plants.

Plant slurry is another organic fertiliser that is very easy to make yourself. Simply collect various wild herbs such as stinging nettle and chop them up in a bucket.

Then add water and let it ferment for about two weeks. The fermentation process releases various nutrients and you have a good, homemade fertiliser.

What are the alternatives to organic fertiliser?

Of course, there are also alternatives to organic fertiliser, such as the aforementioned mineral fertiliser and mixed fertiliser.

The following table will briefly describe the mineral fertiliser and the mixed fertiliser:

Alternative Description
Mineral fertiliser Consists of mineral substances, quick effect, simple and quick mode of action, no promotion of soil conservation
Mixed fertiliser Contains organic as well as mineral substances, relatively quick effect, little promotion of soil conservation

All types of fertiliser serve to promote the growth of your plants. However, organic fertiliser is particularly beneficial for maintaining the soil.

Image source: 123rf / 15528085

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